xibme

# Conflicts:
#	Delta.xcodeproj/project.pbxproj

.gitignore

@@ -8,6 +8,7 @@
 ## Build generated
 build/
 DerivedData
+.build
 
 ## Various settings
 *.pbxuser

.gitmodules

@@ -28,3 +28,9 @@
 [submodule "Cores/MelonDSDeltaCore"]
 	path = Cores/MelonDSDeltaCore
 	url = https://github.com/rileytestut/MelonDSDeltaCore.git
+[submodule "Cores/GPGXDeltaCore"]
+	path = Cores/GPGXDeltaCore
+	url = https://github.com/rileytestut/GPGXDeltaCore.git
+[submodule "External/CheatBase"]
+	path = External/CheatBase
+	url = https://github.com/rileytestut/CheatBase.git

Cores/DSDeltaCore

@@ -1 +1 @@
-Subproject commit b59ca197068be7cf8ca66ff52b24e686154a1c15
+Subproject commit 6c84366b3a76045782905293c9616e33f5da1a35

Cores/DeltaCore

@@ -1 +1 @@
-Subproject commit 212cb618d7e3b90fd978c52c84e9c8c233982e37
+Subproject commit c1db5f51cd455a7033801cc19dc3dbfcb6f2b42c

Cores/GBADeltaCore

@@ -1 +1 @@
-Subproject commit e9327e44dde45e8eef15d28895e50e69ce031f4b
+Subproject commit 8ea36dff87bc1f787765de45fa8ccbcc1256a0e3

Cores/GBCDeltaCore

@@ -1 +1 @@
-Subproject commit 4313fa6670ab534e70d13532c2504761f849c432
+Subproject commit 81f8ffba56823637706689fb5c6bc634ee4d9b32

Cores/GPGXDeltaCore

@@ -0,0 +1 @@
+Subproject commit 18c595887a12ef23e0d54c63f83c91c99e7f4827

Cores/MelonDSDeltaCore

@@ -1 +1 @@
-Subproject commit 677d1e35da42855c29afa7c92882eeb051372d94
+Subproject commit 697ba731981824f53460f6e0193f159f71f22ba2

Cores/N64DeltaCore

@@ -1 +1 @@
-Subproject commit d92746745d52ea255579c707e005cfd57c4c85b7
+Subproject commit c8816c51f82210a9c4cc62b1a7c53fa21bc705ee

Cores/NESDeltaCore

@@ -1 +1 @@
-Subproject commit 78fa7db707655962a1077f4681c35fcf81510060
+Subproject commit 78a092d4e795f83153e98749b5cbeb66cf812d7e

Cores/SNESDeltaCore

@@ -1 +1 @@
-Subproject commit e16b8aa94593df3ee5e65ad6b748de25d59f3a60
+Subproject commit d5717291325578f64d519822aeb2be81217c67f3

Delta.xcodeproj/xcshareddata/xcschemes/Delta.xcscheme

@@ -3,7 +3,7 @@
    LastUpgradeVersion = "1020"
    version = "1.3">
    <BuildAction
-      parallelizeBuildables = "NO"
+      parallelizeBuildables = "YES"
       buildImplicitDependencies = "YES">
       <BuildActionEntries>
          <BuildActionEntry
@@ -29,7 +29,7 @@
             <BuildableReference
                BuildableIdentifier = "primary"
                BlueprintIdentifier = "BFFA71D61AAC406100EE9DD1"
-               BuildableName = "Delta.app"
+               BuildableName = "Retro Game Emulator.app"
                BlueprintName = "Delta"
                ReferencedContainer = "container:Delta.xcodeproj">
             </BuildableReference>
@@ -45,7 +45,7 @@
          <BuildableReference
             BuildableIdentifier = "primary"
             BlueprintIdentifier = "BFFA71D61AAC406100EE9DD1"
-            BuildableName = "Delta.app"
+            BuildableName = "Retro Game Emulator.app"
             BlueprintName = "Delta"
             ReferencedContainer = "container:Delta.xcodeproj">
          </BuildableReference>
@@ -54,7 +54,7 @@
       </Testables>
    </TestAction>
    <LaunchAction
-      buildConfiguration = "Debug"
+      buildConfiguration = "Release"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       enableASanStackUseAfterReturn = "YES"
@@ -69,7 +69,7 @@
          <BuildableReference
             BuildableIdentifier = "primary"
             BlueprintIdentifier = "BFFA71D61AAC406100EE9DD1"
-            BuildableName = "Delta.app"
+            BuildableName = "Retro Game Emulator.app"
             BlueprintName = "Delta"
             ReferencedContainer = "container:Delta.xcodeproj">
          </BuildableReference>
@@ -107,7 +107,7 @@
          <BuildableReference
             BuildableIdentifier = "primary"
             BlueprintIdentifier = "BFFA71D61AAC406100EE9DD1"
-            BuildableName = "Delta.app"
+            BuildableName = "Retro Game Emulator.app"
             BlueprintName = "Delta"
             ReferencedContainer = "container:Delta.xcodeproj">
          </BuildableReference>

Delta.xcodeproj/xcshareddata/xcschemes/DeltaFeatures.xcscheme

@@ -0,0 +1,67 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1420"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "D5D7C1F029E60DFF00663793"
+               BuildableName = "libDeltaFeatures.a"
+               BlueprintName = "DeltaFeatures"
+               ReferencedContainer = "container:Delta.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+      </Testables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "D5D7C1F029E60DFF00663793"
+            BuildableName = "libDeltaFeatures.a"
+            BlueprintName = "DeltaFeatures"
+            ReferencedContainer = "container:Delta.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

Delta.xcodeproj/xcshareddata/xcschemes/DeltaPreviews.xcscheme

@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1430"
+   version = "1.7">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "D539102E29E88B6B0006B350"
+               BuildableName = "DeltaPreviews.framework"
+               BlueprintName = "DeltaPreviews"
+               ReferencedContainer = "container:Delta.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      shouldAutocreateTestPlan = "YES">
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "D539102E29E88B6B0006B350"
+            BuildableName = "DeltaPreviews.framework"
+            BlueprintName = "DeltaPreviews"
+            ReferencedContainer = "container:Delta.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

Delta.xcodeproj/xcshareddata/xcschemes/Systems.xcscheme

@@ -0,0 +1,67 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1250"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "BF6E70B925D2187800E41CD1"
+               BuildableName = "Systems"
+               BlueprintName = "Systems"
+               ReferencedContainer = "container:Delta.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+      </Testables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "BF6E70B925D2187800E41CD1"
+            BuildableName = "Systems"
+            BlueprintName = "Systems"
+            ReferencedContainer = "container:Delta.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

Delta.xcodeproj/xcshareddata/xcschemes/mogenerator.xcscheme

@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1430"
+   version = "1.7">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "BF14D8941DE7A512002CA1BE"
+               BuildableName = "mogenerator"
+               BlueprintName = "mogenerator"
+               ReferencedContainer = "container:Delta.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      shouldAutocreateTestPlan = "YES">
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "BF14D8941DE7A512002CA1BE"
+            BuildableName = "mogenerator"
+            BlueprintName = "mogenerator"
+            ReferencedContainer = "container:Delta.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

Delta.xcworkspace/contents.xcworkspacedata

@@ -28,6 +28,9 @@
    <FileRef
       location = "group:Cores/DSDeltaCore/DSDeltaCore.xcodeproj">
    </FileRef>
+   <FileRef
+      location = "group:Cores/GPGXDeltaCore">
+   </FileRef>
    <FileRef
       location = "group:External/Harmony/Harmony.xcodeproj">
    </FileRef>

Delta.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings

@@ -2,9 +2,9 @@
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
-	<key>BuildSystemType</key>
-	<string>Original</string>
 	<key>IDEWorkspaceSharedSettings_AutocreateContextsIfNeeded</key>
 	<false/>
+	<key>PreviewsEnabled</key>
+	<false/>
 </dict>
 </plist>

Delta.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -0,0 +1,34 @@
+{
+  "object": {
+    "pins": [
+      {
+        "package": "AltKit",
+        "repositoryURL": "https://github.com/rileytestut/AltKit.git",
+        "state": {
+          "branch": null,
+          "revision": "2fd376df1c79ec06a5c80cc8933da027f65b3148",
+          "version": null
+        }
+      },
+      {
+        "package": "DeltaCore",
+        "repositoryURL": "https://github.com/rileytestut/DeltaCore.git",
+        "state": {
+          "branch": "ios14",
+          "revision": "74d2a7a6e36035cb5730d0b0cf2456cbeb6faf0c",
+          "version": null
+        }
+      },
+      {
+        "package": "ZIPFoundation",
+        "repositoryURL": "https://github.com/weichsel/ZIPFoundation.git",
+        "state": {
+          "branch": null,
+          "revision": "02b6abe5f6eef7e3cbd5f247c5cc24e246efcfe0",
+          "version": "0.9.19"
+        }
+      }
+    ]
+  },
+  "version": 1
+}

Delta/AppDelegate.swift

@@ -10,9 +10,7 @@ import UIKit
 
 import DeltaCore
 import Harmony
-
-import Fabric
-import Crashlytics
+import AltKit
 
 private extension CFNotificationName
 {
@@ -39,30 +37,14 @@ class AppDelegate: UIResponder, UIApplicationDelegate
         Settings.registerDefaults()
         
         self.registerCores()
-        
-        #if DEBUG
-        
-        // Must go AFTER registering cores, or else NESDeltaCore may not work correctly when not connected to debugger 🤷‍♂️
-        Fabric.with([Crashlytics.self])
-        
-        #else
-        
-        // Fabric doesn't allow us to change what value it uses for the bundle identifier.
-        // Normally this wouldn't be an issue, except AltStore creates a unique bundle identifier per user.
-        // Rather than have every copy of Delta be listed separately in Fabric, we temporarily swizzle Bundle.infoDictionary
-        // to return a constant identifier while Fabric is starting up. This way, Fabric will now group
-        // all copies of Delta under the bundle identifier "com.rileytestut.Delta.AltStore".
-        Bundle.swizzleBundleID {
-            Fabric.with([Crashlytics.self])
-        }
-        
-        #endif
-        
         self.configureAppearance()
         
         // Controllers
         ExternalGameControllerManager.shared.startMonitoring()
         
+        // JIT
+        ServerManager.shared.prepare()
+        
         // Notifications
         let center = CFNotificationCenterGetDarwinNotifyCenter()
         CFNotificationCenterAddObserver(center, nil, ReceivedApplicationState, CFNotificationName.altstoreRequestAppState.rawValue, nil, .deliverImmediately)
@@ -110,6 +92,34 @@ class AppDelegate: UIResponder, UIApplicationDelegate
     }
 }
 
+@available(iOS 13, *)
+extension AppDelegate
+{
+    func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration
+    {
+        // Called when a new scene session is being created.
+        // Use this method to select a configuration to create the new scene with.
+        
+        if connectingSceneSession.role == .windowExternalDisplay
+        {
+            // External Display
+            return UISceneConfiguration(name: "External Display", sessionRole: connectingSceneSession.role)
+        }
+        else
+        {
+            // Default Scene
+            return UISceneConfiguration(name: "Main", sessionRole: connectingSceneSession.role)
+        }
+    }
+    
+    func application(_ application: UIApplication, didDiscardSceneSessions sceneSessions: Set<UISceneSession>)
+    {
+        // Called when the user discards a scene session.
+        // If any sessions were discarded while the application was not running, this will be called shortly after application:didFinishLaunchingWithOptions.
+        // Use this method to release any resources that were specific to the discarded scenes, as they will not return.
+    }
+}
+
 private extension AppDelegate
 {
     func registerCores()
@@ -128,7 +138,7 @@ private extension AppDelegate
         #if BETA
         System.allCases.forEach { Delta.register($0.deltaCore) }
         #else
-        System.allCases.filter { $0 != .ds }.forEach { Delta.register($0.deltaCore) }
+        System.allCases.filter { $0 != .genesis }.forEach { Delta.register($0.deltaCore) }
         #endif
         
         #endif

Delta/Base.lproj/LaunchScreen.storyboard

@@ -1,13 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13528" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="dkK-ii-Bx4">
-    <device id="retina4_7" orientation="portrait">
-        <adaptation id="fullscreen"/>
-    </device>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="32700.99.1234" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="dkK-ii-Bx4">
+    <device id="retina4_7" orientation="portrait" appearance="light"/>
     <dependencies>
         <deployment identifier="iOS"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13526"/>
-        <capability name="Aspect ratio constraints" minToolsVersion="5.1"/>
-        <capability name="Constraints with non-1.0 multipliers" minToolsVersion="5.1"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="22684"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <scenes>
@@ -23,21 +19,32 @@
                         <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                         <subviews>
-                            <imageView userInteractionEnabled="NO" contentMode="scaleToFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" image="Delta" translatesAutoresizingMaskIntoConstraints="NO" id="plh-tL-LY0">
-                                <rect key="frame" x="94" y="250" width="187.5" height="167"/>
-                                <constraints>
-                                    <constraint firstAttribute="width" secondItem="plh-tL-LY0" secondAttribute="height" multiplier="64:57" id="8qM-L2-ASa"/>
-                                </constraints>
+                            <imageView clipsSubviews="YES" userInteractionEnabled="NO" contentMode="scaleAspectFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" insetsLayoutMarginsFromSafeArea="NO" image="LaunchViewC" translatesAutoresizingMaskIntoConstraints="NO" id="5XD-I3-tLg">
+                                <rect key="frame" x="0.0" y="50" width="375" height="378"/>
                             </imageView>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Retro Game Emulator" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="vhb-Xd-o6a">
+                                <rect key="frame" x="55.5" y="448" width="264" height="33.5"/>
+                                <fontDescription key="fontDescription" type="system" weight="medium" pointSize="28"/>
+                                <color key="textColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                            <label opaque="NO" userInteractionEnabled="NO" alpha="0.44999998807907104" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="ENJOY CLASSIC MOMENT" textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="wWH-Lx-U9x">
+                                <rect key="frame" x="90.5" y="513.5" width="194.5" height="19.5"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="16"/>
+                                <color key="textColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                                <nil key="highlightedColor"/>
+                            </label>
                         </subviews>
-                        <color key="backgroundColor" white="0.14728124936421713" alpha="1" colorSpace="calibratedWhite"/>
+                        <color key="backgroundColor" red="0.071399740870000006" green="0.082175157959999995" blue="0.10832635309999999" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                         <constraints>
-                            <constraint firstItem="plh-tL-LY0" firstAttribute="width" relation="lessThanOrEqual" secondItem="8Uu-wz-ps8" secondAttribute="width" multiplier="0.5" id="8j9-39-Y2s"/>
-                            <constraint firstItem="plh-tL-LY0" firstAttribute="centerY" secondItem="8Uu-wz-ps8" secondAttribute="centerY" id="COW-Co-NFK"/>
-                            <constraint firstItem="plh-tL-LY0" firstAttribute="height" secondItem="8Uu-wz-ps8" secondAttribute="height" multiplier="0.5" priority="900" id="G3L-7B-xVc"/>
-                            <constraint firstItem="plh-tL-LY0" firstAttribute="width" secondItem="8Uu-wz-ps8" secondAttribute="width" multiplier="0.5" priority="950" id="n3i-kS-7eQ"/>
-                            <constraint firstItem="plh-tL-LY0" firstAttribute="centerX" secondItem="8Uu-wz-ps8" secondAttribute="centerX" id="sp5-Kf-N7G"/>
-                            <constraint firstItem="plh-tL-LY0" firstAttribute="height" relation="lessThanOrEqual" secondItem="8Uu-wz-ps8" secondAttribute="height" multiplier="0.5" id="ubN-Qh-I5H"/>
+                            <constraint firstItem="5XD-I3-tLg" firstAttribute="top" secondItem="qMb-3x-uIu" secondAttribute="bottom" constant="30" id="Aiv-ac-bYx"/>
+                            <constraint firstItem="wWH-Lx-U9x" firstAttribute="centerX" secondItem="vhb-Xd-o6a" secondAttribute="centerX" id="DEu-U7-qVq"/>
+                            <constraint firstAttribute="trailing" secondItem="5XD-I3-tLg" secondAttribute="trailing" id="Gc5-y0-Vsy"/>
+                            <constraint firstItem="vhb-Xd-o6a" firstAttribute="top" secondItem="5XD-I3-tLg" secondAttribute="bottom" constant="20" id="Ncn-Yh-ecr"/>
+                            <constraint firstItem="5XD-I3-tLg" firstAttribute="leading" secondItem="8Uu-wz-ps8" secondAttribute="leading" id="SSl-CS-XOC"/>
+                            <constraint firstItem="5XD-I3-tLg" firstAttribute="height" secondItem="8Uu-wz-ps8" secondAttribute="height" multiplier="1.7:3" id="WGx-z3-vXf"/>
+                            <constraint firstItem="wWH-Lx-U9x" firstAttribute="top" secondItem="vhb-Xd-o6a" secondAttribute="bottom" constant="32" id="lVY-5z-fz7"/>
+                            <constraint firstItem="vhb-Xd-o6a" firstAttribute="centerX" secondItem="8Uu-wz-ps8" secondAttribute="centerX" id="oCf-dA-bJX"/>
                         </constraints>
                     </view>
                 </viewController>
@@ -47,6 +54,6 @@
         </scene>
     </scenes>
     <resources>
-        <image name="Delta" width="1342" height="1196"/>
+        <image name="LaunchViewC" width="375" height="472.5"/>
     </resources>
 </document>

Delta/Base.lproj/Main.storyboard

@@ -1,16 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="16096" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="SPq-Bk-fQl">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="32700.99.1234" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="SPq-Bk-fQl">
     <device id="retina4_7" orientation="portrait" appearance="light"/>
     <dependencies>
         <deployment identifier="iOS"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="16086"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="22684"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <scenes>
-        <!--Games-->
+        <!--Games View Controller-->
         <scene sceneID="Cd2-Pf-cua">
             <objects>
-                <viewController id="jeE-WD-wXO" customClass="GamesViewController" customModule="Delta" customModuleProvider="target" sceneMemberID="viewController">
+                <viewController id="jeE-WD-wXO" customClass="GamesViewController" customModule="Retro_Game_Emulator" customModuleProvider="target" sceneMemberID="viewController">
                     <layoutGuides>
                         <viewControllerLayoutGuide type="top" id="WoX-O4-qy5"/>
                         <viewControllerLayoutGuide type="bottom" id="0om-QB-N5a"/>
@@ -25,48 +25,80 @@
                                     <segue destination="tpK-ou-yEA" kind="embed" identifier="embedPageViewController" id="cjU-nW-cHY"/>
                                 </connections>
                             </containerView>
-                        </subviews>
-                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                            <imageView clipsSubviews="YES" userInteractionEnabled="NO" contentMode="scaleAspectFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" image="bg" translatesAutoresizingMaskIntoConstraints="NO" id="J8K-ZI-4X1">
+                                <rect key="frame" x="0.0" y="56" width="375" height="591"/>
+                            </imageView>
+                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="CxB-GP-B6S">
+                                <rect key="frame" x="0.0" y="538" width="375" height="109"/>
+                                <inset key="imageEdgeInsets" minX="0.0" minY="0.0" maxX="2.2250738585072014e-308" maxY="0.0"/>
+                                <state key="normal" image="home_tab"/>
+                                <connections>
+                                    <segue destination="xMK-Cs-fAS" kind="presentation" modalPresentationStyle="fullScreen" id="bxS-9X-3vh"/>
+                                </connections>
+                            </button>
+                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="n4H-Kw-HPj">
+                                <rect key="frame" x="143.5" y="517" width="100" height="100"/>
                                 <constraints>
+                                    <constraint firstAttribute="height" constant="100" id="SLR-9h-t9y"/>
+                                    <constraint firstAttribute="width" constant="100" id="Tdv-6u-nlA"/>
+                                </constraints>
+                                <inset key="imageEdgeInsets" minX="0.0" minY="0.0" maxX="2.2250738585072014e-308" maxY="0.0"/>
+                                <state key="normal" image="addtwo"/>
+                                <connections>
+                                    <action selector="importfilesBtn:" destination="jeE-WD-wXO" eventType="touchUpInside" id="T2w-zr-j8V"/>
+                                </connections>
+                            </button>
+                        </subviews>
+                        <color key="backgroundColor" white="0.0" alpha="0.0" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                        <constraints>
+                            <constraint firstAttribute="trailing" secondItem="CxB-GP-B6S" secondAttribute="trailing" id="5sO-AB-YB5"/>
+                            <constraint firstAttribute="trailing" secondItem="J8K-ZI-4X1" secondAttribute="trailing" id="7MY-qA-ANn"/>
                             <constraint firstAttribute="trailing" secondItem="tmn-gd-5UN" secondAttribute="trailing" id="9Rq-HM-vqk"/>
+                            <constraint firstItem="J8K-ZI-4X1" firstAttribute="leading" secondItem="3Bk-k3-7J9" secondAttribute="leading" id="9kW-o9-BMv"/>
+                            <constraint firstItem="CxB-GP-B6S" firstAttribute="centerX" secondItem="3Bk-k3-7J9" secondAttribute="centerX" id="Dbp-v1-mUp"/>
+                            <constraint firstItem="n4H-Kw-HPj" firstAttribute="centerX" secondItem="3Bk-k3-7J9" secondAttribute="centerX" constant="6" id="H9T-X7-RK8"/>
+                            <constraint firstItem="0om-QB-N5a" firstAttribute="top" secondItem="n4H-Kw-HPj" secondAttribute="bottom" constant="30" id="QHB-jA-R0s"/>
+                            <constraint firstItem="0om-QB-N5a" firstAttribute="top" secondItem="CxB-GP-B6S" secondAttribute="bottom" id="QzJ-Kr-VZk"/>
+                            <constraint firstItem="CxB-GP-B6S" firstAttribute="leading" secondItem="3Bk-k3-7J9" secondAttribute="leading" id="axc-ed-3zE"/>
                             <constraint firstItem="tmn-gd-5UN" firstAttribute="leading" secondItem="3Bk-k3-7J9" secondAttribute="leading" id="f1f-sa-dBA"/>
                             <constraint firstAttribute="bottom" secondItem="tmn-gd-5UN" secondAttribute="bottom" id="ifM-Wa-u9y"/>
+                            <constraint firstItem="J8K-ZI-4X1" firstAttribute="top" secondItem="WoX-O4-qy5" secondAttribute="bottom" id="jaI-AF-tpn"/>
                             <constraint firstItem="tmn-gd-5UN" firstAttribute="top" secondItem="3Bk-k3-7J9" secondAttribute="top" id="nhS-aC-rUR"/>
+                            <constraint firstItem="0om-QB-N5a" firstAttribute="top" secondItem="J8K-ZI-4X1" secondAttribute="bottom" id="tvh-Sd-zA1"/>
                         </constraints>
                     </view>
-                    <navigationItem key="navigationItem" title="Games" id="pFk-as-3k4">
-                        <barButtonItem key="leftBarButtonItem" image="SettingsButton" id="2gg-lC-FhX">
-                            <connections>
-                                <segue destination="xMK-Cs-fAS" kind="presentation" identifier="showSettings" id="uN5-PN-7FK"/>
-                            </connections>
-                        </barButtonItem>
-                        <barButtonItem key="rightBarButtonItem" systemItem="add" id="FeA-O5-xd2">
+                    <navigationItem key="navigationItem" id="pFk-as-3k4">
+                        <barButtonItem key="leftBarButtonItem" image="home" id="2gg-lC-FhX"/>
+                        <barButtonItem key="rightBarButtonItem" style="plain" id="FeA-O5-xd2">
                             <connections>
                                 <action selector="importFiles" destination="jeE-WD-wXO" id="A1s-kE-NkM"/>
                             </connections>
                         </barButtonItem>
                     </navigationItem>
+                    <connections>
+                        <outlet property="importButton" destination="FeA-O5-xd2" id="A44-3S-Okz"/>
+                    </connections>
                 </viewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="JYx-xE-nis" userLabel="First Responder" sceneMemberID="firstResponder"/>
             </objects>
-            <point key="canvasLocation" x="1036" y="1002"/>
+            <point key="canvasLocation" x="1036" y="1001.649175412294"/>
         </scene>
         <!--Game Collection View Controller-->
         <scene sceneID="qNA-NP-TiF">
             <objects>
-                <collectionViewController storyboardIdentifier="gameCollectionViewController" clearsSelectionOnViewWillAppear="NO" id="kqu-75-owz" customClass="GameCollectionViewController" customModule="Delta" customModuleProvider="target" sceneMemberID="viewController">
+                <collectionViewController storyboardIdentifier="gameCollectionViewController" clearsSelectionOnViewWillAppear="NO" id="kqu-75-owz" customClass="GameCollectionViewController" customModule="Retro_Game_Emulator" customModuleProvider="target" sceneMemberID="viewController">
                     <collectionView key="view" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" indicatorStyle="white" dataMode="prototypes" id="OIq-Z8-kxO">
                         <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                         <color key="backgroundColor" red="0.0" green="0.0" blue="0.0" alpha="0.0" colorSpace="custom" customColorSpace="sRGB"/>
-                        <collectionViewFlowLayout key="collectionViewLayout" minimumLineSpacing="20" minimumInteritemSpacing="10" id="NKN-dd-bTh" customClass="GridCollectionViewLayout" customModule="Delta" customModuleProvider="target">
+                        <collectionViewFlowLayout key="collectionViewLayout" minimumLineSpacing="20" minimumInteritemSpacing="10" id="NKN-dd-bTh" customClass="GridCollectionViewLayout" customModule="Retro_Game_Emulator" customModuleProvider="target">
                             <size key="itemSize" width="100" height="100"/>
                             <size key="headerReferenceSize" width="0.0" height="0.0"/>
                             <size key="footerReferenceSize" width="0.0" height="0.0"/>
                             <inset key="sectionInset" minX="0.0" minY="20" maxX="0.0" maxY="20"/>
                         </collectionViewFlowLayout>
                         <cells>
-                            <collectionViewCell opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" reuseIdentifier="Cell" id="ioT-sh-j8y" customClass="GridCollectionViewCell" customModule="Delta" customModuleProvider="target">
+                            <collectionViewCell opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" reuseIdentifier="Cell" id="ioT-sh-j8y" customClass="GridCollectionViewCell" customModule="Retro_Game_Emulator" customModuleProvider="target">
                                 <rect key="frame" x="0.0" y="20" width="100" height="100"/>
                                 <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
                                 <view key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center">
@@ -82,7 +114,7 @@
                     </collectionView>
                     <connections>
                         <segue destination="X2o-q6-XD5" kind="unwind" identifier="unwindFromGames" unwindAction="unwindFromGamesViewControllerWith:" id="k8C-Xn-maU"/>
-                        <segue destination="MPk-bF-nkj" kind="presentation" identifier="saveStates" customClass="SaveStatesStoryboardSegue" customModule="Delta" customModuleProvider="target" id="1Xp-2J-0cq"/>
+                        <segue destination="MPk-bF-nkj" kind="presentation" identifier="saveStates" customClass="SaveStatesStoryboardSegue" customModule="Retro_Game_Emulator" customModuleProvider="target" id="1Xp-2J-0cq"/>
                         <segue destination="qdE-gb-V2e" kind="presentation" identifier="preferredControllerSkins" id="i6y-cP-3WM"/>
                         <segue destination="V2x-v0-jWm" kind="presentation" identifier="showDSSettings" id="kuV-tY-Y0B"/>
                     </connections>
@@ -95,7 +127,7 @@
         <!--Launch View Controller-->
         <scene sceneID="p7y-IT-nlb">
             <objects>
-                <viewController id="SPq-Bk-fQl" customClass="LaunchViewController" customModule="Delta" customModuleProvider="target" sceneMemberID="viewController">
+                <viewController id="SPq-Bk-fQl" customClass="LaunchViewController" customModule="Retro_Game_Emulator" customModuleProvider="target" sceneMemberID="viewController">
                     <layoutGuides>
                         <viewControllerLayoutGuide type="top" id="Qap-U8-zpQ"/>
                         <viewControllerLayoutGuide type="bottom" id="dca-QO-wba"/>
@@ -114,12 +146,38 @@
                             <containerView opaque="NO" contentMode="scaleToFill" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="vf5-Iy-lAb" userLabel="Launch Screen">
                                 <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
                                 <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                                <color key="backgroundColor" red="0.071399740870000006" green="0.082175157959999995" blue="0.10832635309999999" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                 <connections>
                                     <segue destination="ibA-aC-X3M" kind="embed" id="fsv-uf-AOE"/>
                                 </connections>
                             </containerView>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="Mgn-IF-ax7">
+                                <rect key="frame" x="187.5" y="448" width="0.0" height="0.0"/>
+                                <fontDescription key="fontDescription" type="system" weight="medium" pointSize="28"/>
+                                <color key="textColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                            <label opaque="NO" userInteractionEnabled="NO" alpha="0.44999998807907104" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="" textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="wnW-MB-udh">
+                                <rect key="frame" x="187.5" y="480" width="0.0" height="0.0"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="16"/>
+                                <color key="textColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                            <imageView clipsSubviews="YES" userInteractionEnabled="NO" contentMode="scaleAspectFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" translatesAutoresizingMaskIntoConstraints="NO" id="50O-wR-1hq">
+                                <rect key="frame" x="0.0" y="50" width="375" height="378"/>
+                            </imageView>
                         </subviews>
-                        <color key="backgroundColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
+                        <color key="backgroundColor" red="0.071399740870000006" green="0.082175157959999995" blue="0.10832635309999999" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <constraints>
+                            <constraint firstAttribute="trailing" secondItem="50O-wR-1hq" secondAttribute="trailing" id="2Xh-ZZ-Dbc"/>
+                            <constraint firstItem="50O-wR-1hq" firstAttribute="leading" secondItem="8jv-0a-ItC" secondAttribute="leading" id="6rJ-Cz-C3Z"/>
+                            <constraint firstItem="Mgn-IF-ax7" firstAttribute="centerX" secondItem="8jv-0a-ItC" secondAttribute="centerX" id="8kV-gZ-4TW"/>
+                            <constraint firstItem="50O-wR-1hq" firstAttribute="height" secondItem="8jv-0a-ItC" secondAttribute="height" multiplier="1.7:3" id="FTt-Ru-HhA"/>
+                            <constraint firstItem="wnW-MB-udh" firstAttribute="top" secondItem="Mgn-IF-ax7" secondAttribute="bottom" constant="32" id="IAR-im-kU7"/>
+                            <constraint firstItem="50O-wR-1hq" firstAttribute="top" secondItem="Qap-U8-zpQ" secondAttribute="bottom" constant="30" id="bo1-Am-BdP"/>
+                            <constraint firstItem="wnW-MB-udh" firstAttribute="centerX" secondItem="8jv-0a-ItC" secondAttribute="centerX" id="djF-KX-NgM"/>
+                            <constraint firstItem="Mgn-IF-ax7" firstAttribute="top" secondItem="50O-wR-1hq" secondAttribute="bottom" constant="20" id="igk-jf-lgM"/>
+                        </constraints>
                     </view>
                     <connections>
                         <outlet property="gameViewContainerView" destination="oBZ-xU-jeC" id="jMI-iF-JlU"/>
@@ -140,7 +198,7 @@
         <!--Game View Controller-->
         <scene sceneID="ASV-Uk-0aP">
             <objects>
-                <viewController id="yhz-fF-D91" customClass="GameViewController" customModule="Delta" customModuleProvider="target" sceneMemberID="viewController">
+                <viewController id="yhz-fF-D91" customClass="GameViewController" customModule="Retro_Game_Emulator" customModuleProvider="target" sceneMemberID="viewController">
                     <layoutGuides>
                         <viewControllerLayoutGuide type="top" id="ItC-Bu-WRI"/>
                         <viewControllerLayoutGuide type="bottom" id="g58-HO-6L5"/>
@@ -148,12 +206,23 @@
                     <view key="view" contentMode="scaleToFill" id="skW-1S-YD4">
                         <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
-                        <color key="backgroundColor" white="0.0" alpha="1" colorSpace="calibratedWhite"/>
+                        <subviews>
+                            <imageView clipsSubviews="YES" userInteractionEnabled="NO" contentMode="scaleAspectFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" image="bg" translatesAutoresizingMaskIntoConstraints="NO" id="0b6-zE-QS0">
+                                <rect key="frame" x="0.0" y="20" width="375" height="647"/>
+                            </imageView>
+                        </subviews>
+                        <color key="backgroundColor" red="0.02214059979" green="0.092763282360000004" blue="0.18196243049999999" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <constraints>
+                            <constraint firstAttribute="trailing" secondItem="0b6-zE-QS0" secondAttribute="trailing" id="5n6-uA-WLa"/>
+                            <constraint firstItem="0b6-zE-QS0" firstAttribute="top" secondItem="ItC-Bu-WRI" secondAttribute="bottom" id="DTE-cg-9BW"/>
+                            <constraint firstItem="0b6-zE-QS0" firstAttribute="leading" secondItem="skW-1S-YD4" secondAttribute="leading" id="Ej3-6D-wcR"/>
+                            <constraint firstItem="g58-HO-6L5" firstAttribute="top" secondItem="0b6-zE-QS0" secondAttribute="bottom" id="ozO-Ni-qpr"/>
+                        </constraints>
                     </view>
                     <connections>
-                        <segue destination="Yrw-9v-Pcr" kind="presentation" identifier="pause" customClass="PauseStoryboardSegue" customModule="Delta" customModuleProvider="target" id="FLq-Zt-HDv"/>
-                        <segue destination="wKV-3d-NIY" kind="presentation" identifier="showGamesViewController" customClass="GamesStoryboardSegue" customModule="Delta" customModuleProvider="target" id="Tey-6Z-UHp"/>
-                        <segue destination="wKV-3d-NIY" kind="presentation" identifier="showInitialGamesViewController" customClass="InitialGamesStoryboardSegue" customModule="Delta" customModuleProvider="target" id="eR2-0c-0Rv"/>
+                        <segue destination="Yrw-9v-Pcr" kind="presentation" identifier="pause" customClass="PauseStoryboardSegue" customModule="Retro_Game_Emulator" customModuleProvider="target" id="FLq-Zt-HDv"/>
+                        <segue destination="wKV-3d-NIY" kind="presentation" identifier="showGamesViewController" customClass="GamesStoryboardSegue" customModule="Retro_Game_Emulator" customModuleProvider="target" id="Tey-6Z-UHp"/>
+                        <segue destination="wKV-3d-NIY" kind="presentation" identifier="showInitialGamesViewController" customClass="InitialGamesStoryboardSegue" customModule="Retro_Game_Emulator" customModuleProvider="target" id="eR2-0c-0Rv"/>
                     </connections>
                 </viewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="gxI-00-NlJ" userLabel="First Responder" sceneMemberID="firstResponder"/>
@@ -171,10 +240,12 @@
         <!--Settings-->
         <scene sceneID="L3X-MM-hJL">
             <objects>
-                <viewControllerPlaceholder storyboardName="Settings" id="xMK-Cs-fAS" sceneMemberID="viewController"/>
+                <viewControllerPlaceholder storyboardName="Settings" id="xMK-Cs-fAS" sceneMemberID="viewController">
+                    <navigationItem key="navigationItem" id="7yR-QM-2bX"/>
+                </viewControllerPlaceholder>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="2N5-3k-beA" userLabel="First Responder" sceneMemberID="firstResponder"/>
             </objects>
-            <point key="canvasLocation" x="1036" y="605"/>
+            <point key="canvasLocation" x="1578" y="774"/>
         </scene>
         <!--Navigation Controller-->
         <scene sceneID="zJI-sC-1sm">
@@ -185,6 +256,8 @@
                     <navigationBar key="navigationBar" contentMode="scaleToFill" id="wj9-1e-eev">
                         <rect key="frame" x="0.0" y="0.0" width="375" height="56"/>
                         <autoresizingMask key="autoresizingMask"/>
+                        <color key="backgroundColor" white="0.0" alpha="0.0" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                        <color key="barTintColor" red="0.032843004910000001" green="0.076728828250000006" blue="0.13726195690000001" alpha="1" colorSpace="custom" customColorSpace="displayP3"/>
                     </navigationBar>
                     <nil name="viewControllers"/>
                     <toolbar key="toolbar" opaque="NO" clearsContextBeforeDrawing="NO" contentMode="scaleToFill" id="M4r-sO-G4H">
@@ -219,7 +292,7 @@
                     <nil name="viewControllers"/>
                     <connections>
                         <segue destination="Eae-Qk-9MI" kind="relationship" relationship="rootViewController" id="1Jh-Zf-ntp"/>
-                        <segue destination="WQV-Du-4IA" kind="unwind" identifier="unwindFromSaveStates" customClass="SaveStatesStoryboardUnwindSegue" customModule="Delta" customModuleProvider="target" unwindAction="unwindToGameCollectionViewController:" id="dwO-iv-XDr"/>
+                        <segue destination="WQV-Du-4IA" kind="unwind" identifier="unwindFromSaveStates" customClass="SaveStatesStoryboardUnwindSegue" customModule="Retro_Game_Emulator" customModuleProvider="target" unwindAction="unwindToGameCollectionViewController:" id="dwO-iv-XDr"/>
                     </connections>
                 </navigationController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="htj-tq-2KP" userLabel="First Responder" sceneMemberID="firstResponder"/>
@@ -274,29 +347,19 @@
                         <rect key="frame" x="0.0" y="0.0" width="375" height="56"/>
                         <autoresizingMask key="autoresizingMask"/>
                     </navigationBar>
-                    <connections>
-                        <segue destination="cFV-KV-B18" kind="relationship" relationship="rootViewController" id="VBP-fg-oNH"/>
-                    </connections>
                 </navigationController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="Jo9-gl-p5p" userLabel="First Responder" customClass="UIResponder" sceneMemberID="firstResponder"/>
             </objects>
             <point key="canvasLocation" x="2652" y="3085"/>
         </scene>
-        <!--dsSettingsViewController-->
-        <scene sceneID="anM-Cb-BaB">
-            <objects>
-                <viewControllerPlaceholder storyboardName="Settings" referencedIdentifier="dsSettingsViewController" id="cFV-KV-B18" sceneMemberID="viewController">
-                    <navigationItem key="navigationItem" id="Dkm-Hm-sQa"/>
-                </viewControllerPlaceholder>
-                <placeholder placeholderIdentifier="IBFirstResponder" id="IS2-hO-HBN" userLabel="First Responder" customClass="UIResponder" sceneMemberID="firstResponder"/>
-            </objects>
-            <point key="canvasLocation" x="3258" y="3084"/>
-        </scene>
     </scenes>
     <inferredMetricsTieBreakers>
         <segue reference="Tey-6Z-UHp"/>
     </inferredMetricsTieBreakers>
     <resources>
-        <image name="SettingsButton" width="22" height="22"/>
+        <image name="addtwo" width="519" height="519"/>
+        <image name="bg" width="375" height="812"/>
+        <image name="home" width="92" height="37"/>
+        <image name="home_tab" width="384.5" height="109"/>
     </resources>
 </document>

Delta/Base.lproj/PauseMenu.storyboard

@@ -1,9 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="15400" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="Dt0-nV-isV">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="17506" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="Dt0-nV-isV">
     <device id="retina4_7" orientation="portrait" appearance="light"/>
     <dependencies>
         <deployment identifier="iOS"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="15404"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="17504.1"/>
+        <capability name="System colors in document resources" minToolsVersion="11.0"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <scenes>
@@ -167,7 +168,7 @@
                                 </connections>
                             </barButtonItem>
                             <barButtonItem style="plain" id="has-I3-HDZ">
-                                <button key="customView" opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" id="y2a-9f-EFz">
+                                <button key="customView" opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="system" lineBreakMode="middleTruncation" id="y2a-9f-EFz">
                                     <rect key="frame" x="288.5" y="13" width="30" height="30"/>
                                     <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
                                     <state key="normal" title="▼"/>
@@ -206,7 +207,7 @@
                                         <visualEffectView opaque="NO" contentMode="scaleToFill" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="emc-gw-KkJ" userLabel="Selected Background View">
                                             <rect key="frame" x="0.0" y="0.0" width="375" height="45"/>
                                             <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
-                                            <view key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" ambiguous="YES" id="9bA-Tg-Bko">
+                                            <view key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" id="9bA-Tg-Bko">
                                                 <rect key="frame" x="0.0" y="0.0" width="375" height="45"/>
                                                 <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                                                 <color key="backgroundColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
@@ -266,7 +267,7 @@
                     <tableView key="view" clipsSubviews="YES" contentMode="scaleToFill" alwaysBounceVertical="YES" keyboardDismissMode="interactive" dataMode="static" style="grouped" separatorStyle="default" rowHeight="44" sectionHeaderHeight="18" sectionFooterHeight="18" id="BV9-ff-x83">
                         <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
-                        <color key="backgroundColor" red="0.93725490199999995" green="0.93725490199999995" blue="0.95686274510000002" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <color key="backgroundColor" red="0.94901960784313721" green="0.94901960784313721" blue="0.96862745098039216" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                         <sections>
                             <tableViewSection headerTitle="Name" id="QT6-DZ-g70">
                                 <cells>
@@ -337,7 +338,7 @@
                                             <subviews>
                                                 <textView clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" text="XXXXXXXX YYYYYYYY" translatesAutoresizingMaskIntoConstraints="NO" id="a17-LB-QXD" customClass="CheatTextView" customModule="Delta" customModuleProvider="target">
                                                     <rect key="frame" x="0.0" y="0.0" width="375" height="210"/>
-                                                    <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                                                    <color key="textColor" systemColor="labelColor"/>
                                                     <fontDescription key="fontDescription" name="Menlo-Regular" family="Menlo" pointSize="26"/>
                                                     <textInputTraits key="textInputTraits" autocapitalizationType="allCharacters" autocorrectionType="no" spellCheckingType="no" returnKeyType="done"/>
                                                     <connections>
@@ -398,4 +399,9 @@
             <point key="canvasLocation" x="2385" y="1377"/>
         </scene>
     </scenes>
+    <resources>
+        <systemColor name="labelColor">
+            <color white="0.0" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+        </systemColor>
+    </resources>
 </document>

Delta/Components/Collection View/GridCollectionViewCell.swift

@@ -39,7 +39,7 @@ class GridCollectionViewCell: UICollectionViewCell
         }
     }
     
-    var maximumImageSize: CGSize = CGSize(width: 100, height: 100) {
+    var maximumImageSize: CGSize = CGSize(width: 150, height: 120) {
         didSet {
             self.updateMaximumImageSize()
         }
@@ -109,13 +109,15 @@ class GridCollectionViewCell: UICollectionViewCell
         // Image View
         self.imageView.translatesAutoresizingMaskIntoConstraints = false
         
-        self.imageView.topAnchor.constraint(equalTo: self.contentView.topAnchor).isActive = true
-        self.imageView.centerXAnchor.constraint(equalTo: self.contentView.centerXAnchor).isActive = true
+        self.imageView.topAnchor.constraint(equalTo: self.vibrancyView.topAnchor).isActive = true
+        self.imageView.centerXAnchor.constraint(equalTo: self.vibrancyView.centerXAnchor).isActive = true
         
-        self.imageViewWidthConstraint = self.imageView.widthAnchor.constraint(equalToConstant: self.maximumImageSize.width)
+        self.imageViewWidthConstraint = self.imageView.widthAnchor.constraint(equalToConstant: 150)
         self.imageViewWidthConstraint.isActive = true
         
-        self.imageViewHeightConstraint = self.imageView.heightAnchor.constraint(equalToConstant: self.maximumImageSize.height)
+        self.imageViewHeightConstraint = self.imageView.heightAnchor.constraint(equalToConstant: 120)
+        
+        self.imageViewHeightConstraint.priority = UILayoutPriority(999) // Fixes "Unable to simultaneously satisfy constraints" runtime error when inserting new grid row.
         self.imageViewHeightConstraint.isActive = true
         
         
@@ -181,10 +183,15 @@ private extension GridCollectionViewCell
 {
     func updateMaximumImageSize()
     {
-        self.imageViewWidthConstraint.constant = self.maximumImageSize.width
-        self.imageViewHeightConstraint.constant = self.maximumImageSize.height
+        self.imageViewWidthConstraint.constant = 150
+        self.imageViewHeightConstraint.constant = 120
         
         self.textLabelVerticalSpacingConstraint.constant = 8
         self.textLabelFocusedVerticalSpacingConstraint?.constant = self.maximumImageSize.height / 10.0
+        // 修改 textLabel 的固定高度为 30
+//              let textLabelFixedHeight: CGFloat = 30
+//              
+//              self.textLabelVerticalSpacingConstraint.constant = textLabelFixedHeight
+//              self.textLabelFocusedVerticalSpacingConstraint?.constant = textLabelFixedHeight / 50
     }
 }

Delta/Components/Collection View/GridCollectionViewLayout.swift

@@ -50,6 +50,8 @@ class GridCollectionViewLayout: UICollectionViewFlowLayout
         return interitemSpacing
     }
     
+    private var cachedCellLayoutAttributes = [IndexPath: UICollectionViewLayoutAttributes]()
+    
     override var estimatedItemSize: CGSize {
         didSet {
             fatalError("GridCollectionViewLayout does not support self-sizing cells.")
@@ -64,6 +66,18 @@ class GridCollectionViewLayout: UICollectionViewFlowLayout
         self.sectionInset.right = self.interitemSpacing + self.contentInset.right
     }
     
+    override func invalidateLayout(with context: UICollectionViewLayoutInvalidationContext)
+    {
+        super.invalidateLayout(with: context)
+        
+        if let context = context as? UICollectionViewFlowLayoutInvalidationContext,
+            context.invalidateFlowLayoutAttributes || context.invalidateFlowLayoutDelegateMetrics || context.invalidateEverything
+        {
+            // Clear layout cache to prevent crashing due to returning outdated layout attributes.
+            self.cachedCellLayoutAttributes = [:]
+        }
+    }
+    
     override func layoutAttributesForElements(in rect: CGRect) -> [UICollectionViewLayoutAttributes]?
     {
         let layoutAttributes = super.layoutAttributesForElements(in: rect)?.map({ $0.copy() }) as! [UICollectionViewLayoutAttributes]
@@ -137,9 +151,24 @@ class GridCollectionViewLayout: UICollectionViewFlowLayout
             }
         }
         
+        for attributes in layoutAttributes where attributes.representedElementCategory == .cell
+        {
+            // Update cached attributes for layoutAttributesForItem(at:)
+            self.cachedCellLayoutAttributes[attributes.indexPath] = attributes
+        }
+        
         return layoutAttributes
     }
     
+    override func layoutAttributesForItem(at indexPath: IndexPath) -> UICollectionViewLayoutAttributes?
+    {
+        if let cachedAttributes = self.cachedCellLayoutAttributes[indexPath]
+        {
+            return cachedAttributes
+        }
+        
+        return super.layoutAttributesForItem(at: indexPath)
+    }
 }
 
 private extension GridCollectionViewLayout

Delta/Components/Popover Menu/ListMenuViewController.swift

@@ -21,7 +21,8 @@ class ListMenuViewController: UITableViewController
     
     override var preferredContentSize: CGSize {
         get {
-            let navigationBarHeight = self.navigationController?.navigationBar.bounds.height ?? 0.0
+            // Don't include navigation bar height in calculation (as of iOS 13).
+            let navigationBarHeight = 0.0 // self.navigationController?.navigationBar.bounds.height ?? 0.0
             return CGSize(width: 0, height: (self.tableView.rowHeight * CGFloat(self.items.count)) + navigationBarHeight)
         }
         set {}

Delta/Components/Popover Menu/PopoverMenuButton.swift

@@ -17,7 +17,7 @@ extension UINavigationBar
         }
         
         // Make "copy" of self.
-        let navigationBar = UINavigationBar(frame: .zero)
+        let navigationBar = UINavigationBar(frame: self.bounds) // Use self.bounds to avoid "Unable to simultaneously satisfy constraints" runtime error.
         navigationBar.barStyle = self.barStyle
         
         // Set item with title so we can retrieve default text attributes.
@@ -38,11 +38,33 @@ extension UINavigationBar
     private var _defaultTitleTextAttributes: [NSAttributedString.Key: Any]? {
         guard self.titleTextAttributes == nil else { return self.titleTextAttributes }
         
-        guard
-            let contentView = self.subviews.first(where: { NSStringFromClass(type(of: $0)).contains("ContentView") || NSStringFromClass(type(of: $0)).contains("ItemView") }),
-            let titleLabel = contentView.subviews.first(where: { $0 is UILabel }) as? UILabel
+        guard let contentView = self.subviews.first(where: { NSStringFromClass(type(of: $0)).contains("ContentView") || NSStringFromClass(type(of: $0)).contains("ItemView") })
         else { return nil }
         
+        let containerView: UIView
+        
+        //TODO: Recursively search all subviews for title UILabel instead of hardcoded OS version-specific hierarchy traversals...
+        if #available(iOS 16, *)
+        {
+            guard let titleControl = contentView.subviews.first(where: { NSStringFromClass(type(of: $0)).contains("Title") }) else { return nil }
+            
+            if #available(iOS 17, *)
+            {
+                guard let view = titleControl.subviews.first else { return nil }
+                containerView = view
+            }
+            else
+            {
+                containerView = titleControl
+            }
+        }
+        else
+        {
+            containerView = contentView
+        }
+        
+        guard let titleLabel = containerView.subviews.first(where: { $0 is UILabel }) as? UILabel else { return nil }
+        
         let textAttributes = titleLabel.attributedText?.attributes(at: 0, effectiveRange: nil)
         return textAttributes
     }
@@ -63,6 +85,8 @@ class PopoverMenuButton: UIControl
     private let arrowLabel: UILabel
     private let stackView: UIStackView
     
+    private var _didLayoutSubviews = false
+    
     private var parentNavigationBar: UINavigationBar? {
         guard let navigationController = self.parentViewController as? UINavigationController ?? self.parentViewController?.navigationController else { return nil }
         guard self.isDescendant(of: navigationController.navigationBar) else { return nil }
@@ -104,6 +128,21 @@ class PopoverMenuButton: UIControl
     {
         self.updateTextAttributes()
     }
+    
+    override func layoutSubviews()
+    {
+        super.layoutSubviews()
+        
+        if !_didLayoutSubviews
+        {
+            _didLayoutSubviews = true
+            
+            // didMoveToSuperview() can be too early to accurately
+            // update text attributes, so ensure we also update
+            // during first layoutSubviews() call.
+            self.updateTextAttributes()
+        }
+    }
 }
 
 private extension PopoverMenuButton

Delta/Database/Cheats/CheatBase.swift

@@ -0,0 +1,143 @@
+//
+//  CheatBase.swift
+//  Delta
+//
+//  Created by Riley Testut on 1/17/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import Foundation
+import SQLite
+
+import Roxas
+
+private extension UserDefaults
+{
+    @NSManaged var previousCheatBaseVersion: Int
+}
+
+extension ExpressionType
+{
+    static var cheatID: SQLite.Expression<Int> {
+        return SQLite.Expression<Int>("cheatID")
+    }
+    
+    static var cheatName: SQLite.Expression<String> {
+        return SQLite.Expression<String>("cheatName")
+    }
+    
+    static var cheatDescription: SQLite.Expression<String?> {
+        return SQLite.Expression<String?>("cheatDescription")
+    }
+    
+    static var cheatCode: SQLite.Expression<String> {
+        return SQLite.Expression<String>("cheatCode")
+    }
+    
+    static var cheatDeviceID: SQLite.Expression<Int> {
+        return SQLite.Expression<Int>("cheatDeviceID")
+    }
+    
+    static var cheatActivation: SQLite.Expression<String?> {
+        return SQLite.Expression<String?>("cheatActivation")
+    }
+    
+    static var cheatCategoryID: SQLite.Expression<Int> {
+        return SQLite.Expression<Int>("cheatCategoryID")
+    }
+    
+    static var cheatCategoryName: SQLite.Expression<String> {
+        return SQLite.Expression<String>("cheatCategory")
+    }
+    
+    static var cheatCategoryDescription: SQLite.Expression<String> {
+        return SQLite.Expression<String>("cheatCategoryDescription")
+    }
+}
+
+
+extension Table
+{
+    static var cheats: Table {
+        return Table("CHEATS")
+    }
+    
+    static var cheatCategories: Table {
+        return Table("CHEAT_CATEGORIES")
+    }
+}
+
+@available(iOS 14, *)
+class CheatBase: GamesDatabase
+{
+    static let cheatsVersion = 1
+    static var previousCheatsVersion: Int? {
+        return UserDefaults.standard.previousCheatBaseVersion
+    }
+    
+    private let connection: Connection
+    
+    override init() throws
+    {
+        let fileURL = DatabaseManager.cheatBaseURL
+        guard FileManager.default.fileExists(atPath: fileURL.path) else { throw GamesDatabase.Error.doesNotExist }
+        
+        self.connection = try Connection(fileURL.path)
+        
+        try super.init()
+        
+        UserDefaults.standard.previousCheatBaseVersion = CheatBase.cheatsVersion
+    }
+    
+    func cheats(for game: Game) async throws -> [CheatMetadata]?
+    {
+        let metadata = await withCheckedContinuation { continuation in
+            if let context = game.managedObjectContext
+            {
+                context.perform {
+                    let metadata = self.metadata(for: game)
+                    continuation.resume(returning: metadata)
+                }
+            }
+            else
+            {
+                let metadata = self.metadata(for: game)
+                continuation.resume(returning: metadata)
+            }
+        }
+        
+        guard let romIDValue = metadata?.romID else { return nil }
+        
+        let cheatID = Expression<Any>.cheatID
+        let cheatName = Expression<Any>.cheatName
+        let cheatCode = Expression<Any>.cheatCode
+        let cheatDescription = Expression<Any>.cheatDescription
+        let cheatActivation = Expression<Any>.cheatActivation
+        let cheatDeviceID = Expression<Any>.cheatDeviceID
+        
+        let categoryID = Expression<Any>.cheatCategoryID
+        let categoryName = Expression<Any>.cheatCategoryName
+        let categoryDescription = Expression<Any>.cheatCategoryDescription
+        
+        let romID = Expression<Any>.romID
+        
+        let query = Table.cheats.select(cheatID, cheatName, cheatCode, cheatDescription, cheatActivation, cheatDeviceID, Table.cheats[categoryID], categoryName, categoryDescription)
+            .filter(romID == romIDValue)
+            .join(Table.cheatCategories, on: Table.cheats[categoryID] == Table.cheatCategories[categoryID])
+            .order(cheatName)
+        
+        let rows = try self.connection.prepare(query)
+        
+        let results = rows.compactMap { (row) -> CheatMetadata? in
+            guard case let deviceID = Int16(row[cheatDeviceID]), let device = CheatDevice(rawValue: deviceID) else { return nil }
+            
+            let id = row[Table.cheats[categoryID]]
+            
+            let category = CheatCategory(id: id, name: row[categoryName], categoryDescription: row[categoryDescription])
+            let metadata = CheatMetadata(id: row[cheatID], name: row[cheatName], code: row[cheatCode], description: row[cheatDescription], activationHint: row[cheatActivation], device: device, category: category)
+            return metadata
+        }
+        
+        return results
+    }
+}

Delta/Database/Cheats/CheatBaseView.swift

@@ -0,0 +1,273 @@
+//
+//  CheatBaseView.swift
+//  Delta
+//
+//  Created by Riley Testut on 1/17/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import SwiftUI
+
+import enum SQLite.Result
+
+@available(iOS 14, *)
+extension CheatBaseView
+{
+    private class ViewModel: ObservableObject
+    {
+        @Published
+        var allCheats: [CheatMetadata]? {
+            didSet {
+                guard let cheats = allCheats else {
+                    self.cheatsByCategory = nil
+                    return
+                }
+                
+                let cheatsByCategory = Dictionary(grouping: cheats, by: { $0.category }).sorted { $0.key.id < $1.key.id }
+                self.cheatsByCategory = cheatsByCategory
+            }
+        }
+        
+        @Published
+        private(set) var cheatsByCategory: [(CheatCategory, [CheatMetadata])]?
+        
+        @Published
+        private(set) var error: Error?
+        
+        @Published
+        var searchText: String = "" {
+            didSet {
+                self.searchCheats()
+            }
+        }
+        
+        @Published
+        private(set) var filteredCheats: [CheatMetadata]?
+        
+        @MainActor
+        func fetchCheats(for game: Game) async
+        {
+            guard self.allCheats == nil else { return }
+            
+            do
+            {
+                let database = try CheatBase()                
+                let cheats = try await database.cheats(for: game) ?? []
+                self.allCheats = cheats
+            }
+            catch
+            {
+                self.error = error
+            }
+        }
+        
+        private func searchCheats()
+        {
+            if let cheats = self.allCheats, !self.searchText.isEmpty
+            {
+                let predicate = NSPredicate(forSearchingForText: self.searchText, inValuesForKeyPaths: [#keyPath(CheatMetadata.name), #keyPath(CheatMetadata.cheatDescription)])
+                
+                let filteredCheats = cheats.filter { predicate.evaluate(with: $0) }
+                self.filteredCheats = filteredCheats
+            }
+            else
+            {
+                self.filteredCheats = nil
+            }
+        }
+    }
+}
+
+@available(iOS 14, *)
+struct CheatBaseView: View
+{
+    let game: Game?
+    
+    var cancellationHandler: (() -> Void)?
+    var selectionHandler: ((CheatMetadata) -> Void)?
+    
+    @StateObject
+    private var viewModel = ViewModel()
+    
+    @State
+    private var activationHintCheat: CheatMetadata?
+    
+    var body: some View {
+        NavigationView {
+            ZStack {
+                if let cheats = viewModel.allCheats, !cheats.isEmpty
+                {
+                    // Only show List if there is at least one cheat for this game.
+                    cheatList()
+                }
+                
+                // Place above List
+                placeholderView()
+            }
+            .alert(item: $activationHintCheat) { cheat in
+                Alert(title: Text("How to Activate"),
+                      message: Text(cheat.activationHint ?? ""),
+                      dismissButton: .default(Text("OK")))
+            }
+            .navigationTitle(Text(game?.name ?? "CheatBase"))
+            .navigationBarTitleDisplayMode(.inline)
+            .toolbar {
+                ToolbarItem(placement: .cancellationAction) {
+                    Button("Cancel") {
+                        cancellationHandler?()
+                    }
+                }
+            }
+        }
+        .onAppear {
+            Task {
+                guard let game = self.game else { return }
+                await viewModel.fetchCheats(for: game)
+            }
+        }
+    }
+    
+    private func cheatList() -> some View
+    {
+        VStack {
+            if #unavailable(iOS 15)
+            {
+                LegacySearchBar(text: $viewModel.searchText)
+            }
+            
+            let listView = List {
+                if let filteredCheats = viewModel.filteredCheats
+                {
+                    ForEach(filteredCheats) { cheat in
+                        cell(for: cheat)
+                    }
+                }
+                else if let cheats = viewModel.cheatsByCategory
+                {
+                    ForEach(cheats, id: \.0.id) { (category, cheats) in
+                        Section {
+                            DisclosureGroup {
+                                ForEach(cheats) { cheat in
+                                    cell(for: cheat)
+                                }
+                            } label: {
+                                Text(category.name)
+                            }
+                        } footer: {
+                            Text(category.categoryDescription)
+                        }
+                    }
+                }
+            }
+            
+            if #available(iOS 15, *)
+            {
+                listView.searchable(text: $viewModel.searchText)
+            }
+            else
+            {
+                listView
+            }
+        }
+        .listStyle(.insetGrouped)
+        .frame(minWidth: 0, maxWidth: .infinity, minHeight: 0, maxHeight: .infinity, alignment: .top)
+    }
+
+    
+    private func cell(for cheat: CheatMetadata) -> some View
+    {
+        ZStack(alignment: .leading) {
+            Button(action: { choose(cheat) }) {}
+            
+            HStack {
+                // Name + Description
+                VStack(alignment: .leading, spacing: 4) {
+                    Text(cheat.name)
+                    
+                    if let description = cheat.cheatDescription
+                    {
+                        Text(description)
+                            .font(.caption)
+                    }
+                }
+                
+                // Activation Hint
+                if cheat.activationHint != nil
+                {
+                    Spacer()
+                    
+                    Button(action: { activationHintCheat = cheat }) {
+                        Image(systemName: "info.circle")
+                    }
+                    .buttonStyle(.borderless)
+                }
+            }
+            .multilineTextAlignment(.leading)
+        }
+    }
+
+    private func placeholderView() -> some View
+    {
+        VStack(spacing: 8) {
+            if let error = viewModel.error
+            {
+                Text("Unable to Load Cheats")
+                    .font(.title)
+                
+                if let error = error as? SQLite.Result
+                {
+                    // SQLite.Result implements CustomStringConvertible.description, but not localizedDescription.
+                    Text(String(describing: error))
+                        .font(.callout)
+                }
+                else
+                {
+                    Text(error.localizedDescription)
+                        .font(.callout)
+                }
+            }
+            else if let filteredCheats = viewModel.filteredCheats, filteredCheats.isEmpty
+            {
+                Text("Cheat Not Found")
+                    .font(.title)
+                
+                Text("Please make sure the name is correct, or try searching for another cheat.")
+                    .font(.callout)
+            }
+            else if let cheats = viewModel.allCheats, cheats.isEmpty
+            {
+                Text("No Cheats")
+                    .font(.title)
+                
+                Text("There are no cheats for this game in Delta's CheatBase. Please try a different game.")
+                    .font(.callout)
+            }
+            else if viewModel.allCheats == nil
+            {
+                ProgressView()
+                    .progressViewStyle(.circular)
+            }
+        }
+        .frame(minWidth: 0, maxWidth: .infinity, minHeight: 0, maxHeight: .infinity, alignment: .center)
+        .foregroundColor(.gray)
+        .padding()
+    }
+    
+    init(game: Game, cheats: [CheatMetadata]? = nil)
+    {
+        self.game = game
+        
+        let viewModel = ViewModel()
+        viewModel.allCheats = cheats
+        self._viewModel = StateObject(wrappedValue: viewModel)
+    }
+}
+
+@available(iOS 14, *)
+private extension CheatBaseView
+{
+    func choose(_ cheatMetadata: CheatMetadata)
+    {
+        self.selectionHandler?(cheatMetadata)
+    }
+}

Delta/Database/Cheats/CheatDevice.swift

@@ -0,0 +1,111 @@
+//
+//  CheatDevice.swift
+//  Delta
+//
+//  Created by Riley Testut on 1/30/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import Foundation
+
+import DeltaCore
+import NESDeltaCore
+
+@objc
+enum CheatDevice: Int16
+{
+    case famicomGameGenie = 1
+    case famicomRaw = 2
+    case famicomRawCompare = 3
+    
+    case gbGameGenie = 4
+    
+    case gbaActionReplayMax = 5
+    case gbaCodeBreaker = 6
+    case gbaGameShark = 7
+    
+    case gbcGameShark = 8
+    
+    case n64GameShark = 9
+    
+    case dsActionReplay = 10
+    case dsCodeBreaker = 11
+    
+    case nesGameGenie = 12
+    case nesRaw = 13
+    case nesRawCompare = 14
+    
+    case snesActionReplay = 15
+    case snesGameGenie = 16
+    
+    case gameGearActionReplay = 17
+    case gameGearGameGenie = 18
+    
+    case masterSystemActionReplay = 19
+    case masterSystemGameGenie = 20
+    
+    case cdActionReplay10 = 21
+    case cdActionReplay8 = 22
+    
+    case genesisActionReplay10 = 23
+    case genesisActionReplay8 = 24
+}
+
+extension CheatDevice
+{
+    var cheatType: CheatType? {
+        switch self
+        {
+        case .snesActionReplay, .gbaActionReplayMax, .dsActionReplay, .gameGearActionReplay, .masterSystemActionReplay, .genesisActionReplay8, .genesisActionReplay10, .cdActionReplay8, .cdActionReplay10:
+            return .actionReplay
+            
+        case .n64GameShark, .gbcGameShark, .gbaGameShark:
+            return .gameShark
+            
+        case .famicomGameGenie, .snesGameGenie, .gbGameGenie, .gameGearGameGenie, .masterSystemGameGenie:
+            return .gameGenie
+            
+        case .nesGameGenie:
+            return CheatType(rawValue: DeltaCore.CheatType.gameGenie8.rawValue)
+            
+        case .gbaCodeBreaker, .dsCodeBreaker:
+            return .codeBreaker
+            
+        case .famicomRaw, .famicomRawCompare:
+            return nil
+            
+        case .nesRaw, .nesRawCompare:
+            return nil
+        }
+    }
+    
+    var gameType: GameType? {
+        switch self
+        {
+        case .famicomGameGenie, .famicomRaw, .famicomRawCompare: return .nes
+        case .nesGameGenie, .nesRaw, .nesRawCompare: return .nes
+        case .snesActionReplay, .snesGameGenie: return .snes
+        case .n64GameShark: return .n64
+        case .gbGameGenie, .gbcGameShark: return .gbc
+        case .gbaActionReplayMax, .gbaGameShark, .gbaCodeBreaker: return .gba
+        case .dsActionReplay, .dsCodeBreaker: return .ds
+        case .genesisActionReplay8, .genesisActionReplay10: return .genesis
+        case .cdActionReplay8, .cdActionReplay10: return .genesis
+            
+        // Not yet supported
+        case .gameGearActionReplay, .gameGearGameGenie: return nil
+        case .masterSystemActionReplay, .masterSystemGameGenie: return nil
+        }
+    }
+    
+    var cheatFormat: CheatFormat? {
+        guard
+            let cheatType = self.cheatType,
+            let gameType = self.gameType,
+            let deltaCore = Delta.core(for: gameType)
+        else { return nil }
+        
+        let cheatFormat = deltaCore.supportedCheatFormats.first { $0.type == cheatType }
+        return cheatFormat
+    }
+}

Delta/Database/Cheats/CheatMetadata.swift

@@ -0,0 +1,45 @@
+//
+//  CheatMetadata.swift
+//  Delta
+//
+//  Created by Riley Testut on 1/17/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import UIKit
+
+import DeltaCore
+
+struct CheatCategory: Identifiable, Hashable
+{
+    var id: Int
+    
+    var name: String
+    var categoryDescription: String
+}
+
+@objcMembers // @objcMembers required for NSPredicate-based filtering.
+final class CheatMetadata: NSObject, Identifiable
+{
+    let id: Int
+    
+    let name: String
+    let code: String
+    
+    let cheatDescription: String?
+    let activationHint: String?
+    
+    let device: CheatDevice
+    let category: CheatCategory
+    
+    init(id: Int, name: String, code: String, description: String?, activationHint: String?, device: CheatDevice, category: CheatCategory)
+    {
+        self.id = id
+        self.name = name
+        self.code = code
+        self.cheatDescription = description
+        self.activationHint = activationHint
+        self.device = device
+        self.category = category
+    }
+}

Delta/Database/Cheats/LegacySearchBar.swift

@@ -0,0 +1,51 @@
+//
+//  LegacySearchBar.swift
+//  Delta
+//
+//  Created by Riley Testut on 1/25/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import UIKit
+import SwiftUI
+
+@available(iOS 13, *)
+struct LegacySearchBar: UIViewRepresentable
+{
+    class Coordinator: NSObject, UISearchBarDelegate
+    {
+        @Binding
+        var text: String
+        
+        init(text: Binding<String>)
+        {
+            self._text = text
+        }
+        
+        func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String)
+        {
+            self.text = searchText
+        }
+    }
+    
+    @Binding
+    var text: String
+    
+    func makeUIView(context: Context) -> UISearchBar
+    {
+        let searchBar = UISearchBar(frame: .zero)
+        searchBar.delegate = context.coordinator
+        searchBar.placeholder = NSLocalizedString("Search", comment: "")
+        return searchBar
+    }
+    
+    func updateUIView(_ uiView: UISearchBar, context: Context)
+    {
+        uiView.text = self.text
+    }
+    
+    func makeCoordinator() -> Coordinator
+    {
+        return Coordinator(text: $text)
+    }
+}

Delta/Database/DatabaseManager.swift

@@ -111,27 +111,62 @@ extension DatabaseManager
         switch system
         {
         case .ds where core == MelonDS.core:
-            let predicate = NSPredicate(format: "%K == %@", #keyPath(Game.identifier), Game.melonDSBIOSIdentifier)
+            
+            // Returns nil if game already exists.
+            func makeBIOS(name: String, identifier: String) -> Game?
+            {
+                let predicate = NSPredicate(format: "%K == %@", #keyPath(Game.identifier), identifier)
                 if let _ = Game.instancesWithPredicate(predicate, inManagedObjectContext: context, type: Game.self).first
                 {
-                // Game already exists, so don't do anything.
-                break
+                    // BIOS already exists, so don't do anything.
+                    return nil
                 }
                 
-            let game = Game(context: context)
-            game.identifier = Game.melonDSBIOSIdentifier
-            game.type = .ds
-            game.filename = "melonDS-BIOS"
+                let filename: String
                 
-            game.name = NSLocalizedString("Home Screen", comment: "")
+                switch identifier
+                {
+                case Game.melonDSBIOSIdentifier:
+                    guard
+                        FileManager.default.fileExists(atPath: MelonDSEmulatorBridge.shared.bios7URL.path) &&
+                        FileManager.default.fileExists(atPath: MelonDSEmulatorBridge.shared.bios9URL.path) &&
+                        FileManager.default.fileExists(atPath: MelonDSEmulatorBridge.shared.firmwareURL.path)
+                    else { return nil }
                     
-            if let sourceURL = Bundle.main.url(forResource: "DS", withExtension: "png")
+                    filename = "nds.bios"
+                    
+                case Game.melonDSDSiBIOSIdentifier:
+                    #if BETA
+                    
+                    guard
+                        FileManager.default.fileExists(atPath: MelonDSEmulatorBridge.shared.dsiBIOS7URL.path) &&
+                        FileManager.default.fileExists(atPath: MelonDSEmulatorBridge.shared.dsiBIOS9URL.path) &&
+                        FileManager.default.fileExists(atPath: MelonDSEmulatorBridge.shared.dsiFirmwareURL.path) &&
+                        FileManager.default.fileExists(atPath: MelonDSEmulatorBridge.shared.dsiNANDURL.path)
+                    else { return nil }
+                    
+                    filename = "dsi.bios"
+                    
+                    #else
+                    return nil
+                    #endif
+                
+                default: filename = "system.bios"
+                }
+                
+                let bios = Game(context: context)
+                bios.name = name
+                bios.identifier = identifier
+                bios.type = .ds
+                bios.filename = filename
+                
+                if let artwork = UIImage(named: "DS Home Screen"), let artworkData = artwork.pngData()
                 {
                     do
                     {
-                    let destinationURL = DatabaseManager.artworkURL(for: game)
-                    try FileManager.default.copyItem(at: sourceURL, to: destinationURL, shouldReplace: true)
-                    game.artworkURL = destinationURL
+                        let destinationURL = DatabaseManager.artworkURL(for: bios)
+                        try artworkData.write(to: destinationURL, options: .atomic)
+                        bios.artworkURL = destinationURL
                     }
                     catch
                     {
@@ -139,14 +174,27 @@ extension DatabaseManager
                     }
                 }
                 
+                return bios
+            }
+            
+            let insertedGames = [
+                (name: NSLocalizedString("Home Screen", comment: ""), identifier: Game.melonDSBIOSIdentifier),
+                (name: NSLocalizedString("Home Screen (DSi)", comment: ""), identifier: Game.melonDSDSiBIOSIdentifier)
+            ].compactMap(makeBIOS)
+            
+            // Break if we didn't create any new Games.
+            guard !insertedGames.isEmpty else { break }
+            
             let gameCollection = GameCollection(context: context)
             gameCollection.identifier = GameType.ds.rawValue
             gameCollection.index = Int16(System.ds.year)
-            gameCollection.games.insert(game)
+            gameCollection.games.formUnion(insertedGames)
             
         case .ds:
-            let predicate = NSPredicate(format: "%K == %@", #keyPath(Game.identifier), Game.melonDSBIOSIdentifier)
-            if let game = Game.instancesWithPredicate(predicate, inManagedObjectContext: context, type: Game.self).first
+            let predicate = NSPredicate(format: "%K IN %@", #keyPath(Game.identifier), [Game.melonDSBIOSIdentifier, Game.melonDSDSiBIOSIdentifier])
+            
+            let games = Game.instancesWithPredicate(predicate, inManagedObjectContext: context, type: Game.self)
+            for game in games
             {
                 context.delete(game)
             }
@@ -207,10 +255,27 @@ private extension DatabaseManager
             
             do
             {                
-                if !FileManager.default.fileExists(atPath: DatabaseManager.gamesDatabaseURL.path)
+                if !FileManager.default.fileExists(atPath: DatabaseManager.gamesDatabaseURL.path) || GamesDatabase.version != GamesDatabase.previousVersion
                 {
                     guard let bundleURL = Bundle.main.url(forResource: "openvgdb", withExtension: "sqlite") else { throw GamesDatabase.Error.doesNotExist }
-                    try FileManager.default.copyItem(at: bundleURL, to: DatabaseManager.gamesDatabaseURL)
+                    try FileManager.default.copyItem(at: bundleURL, to: DatabaseManager.gamesDatabaseURL, shouldReplace: true)
+                }
+                
+                if #available(iOS 14, *), !FileManager.default.fileExists(atPath: DatabaseManager.cheatBaseURL.path) || CheatBase.cheatsVersion != CheatBase.previousCheatsVersion
+                {
+                    guard let archiveURL = Bundle.main.url(forResource: "cheatbase", withExtension: "zip") else { throw GamesDatabase.Error.doesNotExist }
+                    
+                    let temporaryDirectoryURL = FileManager.default.uniqueTemporaryURL()
+                    try FileManager.default.createDirectory(at: temporaryDirectoryURL, withIntermediateDirectories: true)
+                    defer {
+                        try? FileManager.default.removeItem(at: temporaryDirectoryURL)
+                    }
+                    
+                    // Unzip to temporaryDirectoryURL first to ensure we don't accidentally unzip other items into DatabaseManager.cheatBaseURL directory (e.g. __MACOSX directory).
+                    try FileManager.default.unzipItem(at: archiveURL, to: temporaryDirectoryURL, skipCRC32: true) // skipCRC32 to avoid ~10 second extraction.
+                    
+                    let extractedDatabaseURL = temporaryDirectoryURL.appendingPathComponent("cheatbase.sqlite")
+                    try FileManager.default.copyItem(at: extractedDatabaseURL, to: DatabaseManager.cheatBaseURL, shouldReplace: true)
                 }
                 
                 self.gamesDatabase = try GamesDatabase()
@@ -480,7 +545,7 @@ extension DatabaseManager
                             try FileManager.default.removeItem(at: outputURL)
                         }
                         
-                        _ = try archive.extract(entry, to: outputURL)
+                        _ = try archive.extract(entry, to: outputURL, skipCRC32: true)
                         
                         outputURLs.insert(outputURL)
                     }
@@ -571,6 +636,12 @@ extension DatabaseManager
         return gamesDatabaseURL
     }
     
+    class var cheatBaseURL: URL
+    {
+        let gamesDatabaseURL = self.defaultDirectoryURL().appendingPathComponent("cheatbase.sqlite")
+        return gamesDatabaseURL
+    }
+
     class var gamesDirectoryURL: URL
     {
         let gamesDirectoryURL = DatabaseManager.defaultDirectoryURL().appendingPathComponent("Games")
@@ -615,7 +686,7 @@ extension DatabaseManager
     {
         let gameURL = game.fileURL
         
-        let artworkURL = gameURL.deletingPathExtension().appendingPathExtension("jpg")
+        let artworkURL = gameURL.deletingPathExtension().appendingPathExtension("png")
         return artworkURL
     }
 }

Delta/Database/Model/Delta.xcdatamodeld/.xccurrentversion

@@ -3,6 +3,6 @@
 <plist version="1.0">
 <dict>
 	<key>_XCCurrentVersionName</key>
-	<string>Delta 6.xcdatamodel</string>
+	<string>Delta 7.xcdatamodel</string>
 </dict>
 </plist>

Delta/Database/Model/Delta.xcdatamodeld/Delta 7.xcdatamodel/contents

@@ -0,0 +1,152 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<model type="com.apple.IDECoreDataModeler.DataModel" documentVersion="1.0" lastSavedToolsVersion="22158.8" systemVersion="22F66" minimumToolsVersion="Xcode 7.0" sourceLanguage="Objective-C" userDefinedModelVersionIdentifier="1.0">
+    <entity name="Cheat" representedClassName="Cheat" syncable="YES">
+        <attribute name="code" attributeType="String" syncable="YES"/>
+        <attribute name="creationDate" attributeType="Date" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="identifier" attributeType="String" syncable="YES"/>
+        <attribute name="isEnabled" attributeType="Boolean" defaultValueString="NO" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="modifiedDate" attributeType="Date" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="name" attributeType="String" syncable="YES"/>
+        <attribute name="type" attributeType="Transformable" valueTransformerName="NSSecureUnarchiveFromData" syncable="YES">
+            <userInfo>
+                <entry key="attributeValueClassName" value="CheatType"/>
+            </userInfo>
+        </attribute>
+        <relationship name="game" optional="YES" maxCount="1" deletionRule="Nullify" destinationEntity="Game" inverseName="cheats" inverseEntity="Game" syncable="YES"/>
+        <uniquenessConstraints>
+            <uniquenessConstraint>
+                <constraint value="identifier"/>
+            </uniquenessConstraint>
+        </uniquenessConstraints>
+    </entity>
+    <entity name="ControllerSkin" representedClassName="ControllerSkin" syncable="YES">
+        <attribute name="filename" attributeType="String" syncable="YES"/>
+        <attribute name="gameType" attributeType="Transformable" valueTransformerName="NSSecureUnarchiveFromData" syncable="YES">
+            <userInfo>
+                <entry key="attributeValueClassName" value="GameType"/>
+            </userInfo>
+        </attribute>
+        <attribute name="identifier" attributeType="String" syncable="YES"/>
+        <attribute name="isStandard" attributeType="Boolean" defaultValueString="NO" usesScalarValueType="YES" syncable="YES"/>
+        <attribute name="name" attributeType="String" syncable="YES"/>
+        <attribute name="supportedConfigurations" attributeType="Integer 16" defaultValueString="0" usesScalarValueType="YES" syncable="YES">
+            <userInfo>
+                <entry key="attributeValueScalarType" value="ControllerSkinConfigurations"/>
+            </userInfo>
+        </attribute>
+        <relationship name="preferredLandscapeSkinByGames" toMany="YES" deletionRule="Nullify" destinationEntity="Game" inverseName="preferredLandscapeSkin" inverseEntity="Game" syncable="YES"/>
+        <relationship name="preferredPortraitSkinByGames" toMany="YES" deletionRule="Nullify" destinationEntity="Game" inverseName="preferredPortraitSkin" inverseEntity="Game" syncable="YES"/>
+        <uniquenessConstraints>
+            <uniquenessConstraint>
+                <constraint value="identifier"/>
+                <constraint value="gameType"/>
+            </uniquenessConstraint>
+        </uniquenessConstraints>
+    </entity>
+    <entity name="Game" representedClassName="Game" syncable="YES">
+        <attribute name="artworkURL" optional="YES" attributeType="Transformable" valueTransformerName="NSSecureUnarchiveFromData" syncable="YES">
+            <userInfo>
+                <entry key="attributeValueClassName" value="URL"/>
+            </userInfo>
+        </attribute>
+        <attribute name="filename" attributeType="String" syncable="YES">
+            <userInfo>
+                <entry key="attributeValueClassName" value="NSURL"/>
+            </userInfo>
+        </attribute>
+        <attribute name="identifier" attributeType="String" syncable="YES"/>
+        <attribute name="name" attributeType="String" syncable="YES"/>
+        <attribute name="playedDate" optional="YES" attributeType="Date" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="type" attributeType="Transformable" valueTransformerName="NSSecureUnarchiveFromData" syncable="YES">
+            <userInfo>
+                <entry key="attributeValueClassName" value="GameType"/>
+            </userInfo>
+        </attribute>
+        <relationship name="cheats" toMany="YES" deletionRule="Cascade" destinationEntity="Cheat" inverseName="game" inverseEntity="Cheat" syncable="YES"/>
+        <relationship name="gameCollection" optional="YES" maxCount="1" deletionRule="Nullify" destinationEntity="GameCollection" inverseName="games" inverseEntity="GameCollection" syncable="YES"/>
+        <relationship name="gameSave" optional="YES" maxCount="1" deletionRule="Cascade" destinationEntity="GameSave" inverseName="game" inverseEntity="GameSave" syncable="YES"/>
+        <relationship name="preferredLandscapeSkin" optional="YES" maxCount="1" deletionRule="Nullify" destinationEntity="ControllerSkin" inverseName="preferredLandscapeSkinByGames" inverseEntity="ControllerSkin" syncable="YES"/>
+        <relationship name="preferredPortraitSkin" optional="YES" maxCount="1" deletionRule="Nullify" destinationEntity="ControllerSkin" inverseName="preferredPortraitSkinByGames" inverseEntity="ControllerSkin" syncable="YES"/>
+        <relationship name="previewSaveState" optional="YES" maxCount="1" deletionRule="Nullify" destinationEntity="SaveState" inverseName="previewGame" inverseEntity="SaveState" syncable="YES"/>
+        <relationship name="saveStates" toMany="YES" deletionRule="Cascade" destinationEntity="SaveState" inverseName="game" inverseEntity="SaveState" syncable="YES"/>
+        <uniquenessConstraints>
+            <uniquenessConstraint>
+                <constraint value="identifier"/>
+            </uniquenessConstraint>
+        </uniquenessConstraints>
+    </entity>
+    <entity name="GameCollection" representedClassName="GameCollection" syncable="YES">
+        <attribute name="identifier" attributeType="String" syncable="YES"/>
+        <attribute name="index" attributeType="Integer 16" defaultValueString="0" usesScalarValueType="NO" syncable="YES"/>
+        <relationship name="games" toMany="YES" deletionRule="Nullify" destinationEntity="Game" inverseName="gameCollection" inverseEntity="Game" syncable="YES"/>
+        <uniquenessConstraints>
+            <uniquenessConstraint>
+                <constraint value="identifier"/>
+            </uniquenessConstraint>
+        </uniquenessConstraints>
+    </entity>
+    <entity name="GameControllerInputMapping" representedClassName="GameControllerInputMapping" syncable="YES">
+        <attribute name="deltaCoreInputMapping" attributeType="Transformable" valueTransformerName="GameControllerInputMappingTransformer" syncable="YES">
+            <userInfo>
+                <entry key="attributeValueClassName" value="Any"/>
+            </userInfo>
+        </attribute>
+        <attribute name="gameControllerInputType" attributeType="Transformable" valueTransformerName="NSSecureUnarchiveFromData" syncable="YES">
+            <userInfo>
+                <entry key="attributeValueClassName" value="GameControllerInputType"/>
+            </userInfo>
+        </attribute>
+        <attribute name="gameType" attributeType="Transformable" valueTransformerName="NSSecureUnarchiveFromData" syncable="YES">
+            <userInfo>
+                <entry key="attributeValueClassName" value="GameType"/>
+            </userInfo>
+        </attribute>
+        <attribute name="identifier" attributeType="String" syncable="YES"/>
+        <attribute name="playerIndex" attributeType="Integer 16" defaultValueString="0" usesScalarValueType="NO" syncable="YES"/>
+        <uniquenessConstraints>
+            <uniquenessConstraint>
+                <constraint value="gameControllerInputType"/>
+                <constraint value="gameType"/>
+                <constraint value="playerIndex"/>
+            </uniquenessConstraint>
+            <uniquenessConstraint>
+                <constraint value="identifier"/>
+            </uniquenessConstraint>
+        </uniquenessConstraints>
+    </entity>
+    <entity name="GameSave" representedClassName="GameSave" syncable="YES">
+        <attribute name="identifier" attributeType="String" syncable="YES"/>
+        <attribute name="modifiedDate" attributeType="Date" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="sha1" optional="YES" attributeType="String" syncable="YES"/>
+        <relationship name="game" optional="YES" maxCount="1" deletionRule="Nullify" destinationEntity="Game" inverseName="gameSave" inverseEntity="Game" syncable="YES"/>
+        <uniquenessConstraints>
+            <uniquenessConstraint>
+                <constraint value="identifier"/>
+            </uniquenessConstraint>
+        </uniquenessConstraints>
+    </entity>
+    <entity name="SaveState" representedClassName="SaveState" versionHashModifier="quick" syncable="YES">
+        <attribute name="coreIdentifier" optional="YES" attributeType="String" syncable="YES"/>
+        <attribute name="creationDate" attributeType="Date" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="filename" attributeType="String" syncable="YES">
+            <userInfo>
+                <entry key="attributeValueClassName" value="NSURL"/>
+            </userInfo>
+        </attribute>
+        <attribute name="identifier" attributeType="String" syncable="YES"/>
+        <attribute name="modifiedDate" attributeType="Date" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="name" optional="YES" attributeType="String" syncable="YES"/>
+        <attribute name="type" attributeType="Integer 16" defaultValueString="2" usesScalarValueType="NO" syncable="YES">
+            <userInfo>
+                <entry key="attributeValueScalarType" value="SaveStateType"/>
+            </userInfo>
+        </attribute>
+        <relationship name="game" optional="YES" maxCount="1" deletionRule="Nullify" destinationEntity="Game" inverseName="saveStates" inverseEntity="Game" syncable="YES"/>
+        <relationship name="previewGame" optional="YES" maxCount="1" deletionRule="Nullify" destinationEntity="Game" inverseName="previewSaveState" inverseEntity="Game" syncable="YES"/>
+        <uniquenessConstraints>
+            <uniquenessConstraint>
+                <constraint value="identifier"/>
+            </uniquenessConstraint>
+        </uniquenessConstraints>
+    </entity>
+</model>

Delta/Database/Model/Human/Cheat.swift

@@ -53,4 +53,9 @@ extension Cheat: Syncable
     public var syncableLocalizedName: String? {
         return self.name
     }
+    
+    public func resolveConflict(_ record: AnyRecord) -> ConflictResolution
+    {
+        return .newest
+    }
 }

Delta/Database/Model/Human/ControllerSkin.swift

@@ -13,16 +13,27 @@ import Harmony
 
 extension ControllerSkinConfigurations
 {
-    init(traits: DeltaCore.ControllerSkin.Traits)
+    init?(traits: DeltaCore.ControllerSkin.Traits)
     {
-        switch (traits.displayType, traits.orientation)
+        switch (traits.device, traits.displayType, traits.orientation)
         {
-        case (.standard, .portrait): self = .standardPortrait
-        case (.standard, .landscape): self = .standardLandscape
-        case (.edgeToEdge, .portrait): self = .edgeToEdgePortrait
-        case (.edgeToEdge, .landscape): self = .edgeToEdgeLandscape
-        case (.splitView, .portrait): self = .splitViewPortrait
-        case (.splitView, .landscape): self = .splitViewLandscape
+        case (.iphone, .standard, .portrait): self = .iphoneStandardPortrait
+        case (.iphone, .standard, .landscape): self = .iphoneStandardLandscape
+        case (.iphone, .edgeToEdge, .portrait): self = .iphoneEdgeToEdgePortrait
+        case (.iphone, .edgeToEdge, .landscape): self = .iphoneEdgeToEdgeLandscape
+        case (.iphone, .splitView, _): return nil
+            
+        case (.ipad, .standard, .portrait): self = .ipadStandardPortrait
+        case (.ipad, .standard, .landscape): self = .ipadStandardLandscape
+        case (.ipad, .edgeToEdge, .portrait): self = .ipadEdgeToEdgePortrait
+        case (.ipad, .edgeToEdge, .landscape): self = .ipadEdgeToEdgeLandscape
+        case (.ipad, .splitView, .portrait): self = .ipadSplitViewPortrait
+        case (.ipad, .splitView, .landscape): self = .ipadSplitViewLandscape
+            
+        case (.tv, .standard, .portrait): self = .tvStandardPortrait
+        case (.tv, .standard, .landscape): self = .tvStandardLandscape
+        case (.tv, .edgeToEdge, _): return nil
+        case (.tv, .splitView, _): return nil
         }
     }
 }
@@ -71,11 +82,6 @@ extension ControllerSkin: ControllerSkinProtocol
         return self.controllerSkin?.thumbstick(for: item, traits: traits, preferredSize: preferredSize)
     }
     
-    public func inputs(for traits: DeltaCore.ControllerSkin.Traits, at point: CGPoint) -> [Input]?
-    {
-        return self.controllerSkin?.inputs(for: traits, at: point)
-    }
-    
     public func items(for traits: DeltaCore.ControllerSkin.Traits) -> [DeltaCore.ControllerSkin.Item]?
     {
         return self.controllerSkin?.items(for: traits)
@@ -86,11 +92,6 @@ extension ControllerSkin: ControllerSkinProtocol
         return self.controllerSkin?.isTranslucent(for: traits)
     }
     
-    public func gameScreenFrame(for traits: DeltaCore.ControllerSkin.Traits) -> CGRect?
-    {
-        return self.controllerSkin?.gameScreenFrame(for: traits)
-    }
-    
     public func screens(for traits: DeltaCore.ControllerSkin.Traits) -> [DeltaCore.ControllerSkin.Screen]?
     {
         return self.controllerSkin?.screens(for: traits)
@@ -100,6 +101,11 @@ extension ControllerSkin: ControllerSkinProtocol
     {
         return self.controllerSkin?.aspectRatio(for: traits)
     }
+    
+    public func contentSize(for traits: DeltaCore.ControllerSkin.Traits) -> CGSize?
+    {
+        return self.controllerSkin?.contentSize(for: traits)
+    }
 }
 
 extension ControllerSkin: Syncable
@@ -123,4 +129,9 @@ extension ControllerSkin: Syncable
     public var syncableLocalizedName: String? {
         return self.name
     }
+    
+    public func resolveConflict(_ record: AnyRecord) -> ConflictResolution
+    {
+        return .newest
+    }
 }

Delta/Database/Model/Human/Game.swift

@@ -9,11 +9,14 @@
 import Foundation
 
 import DeltaCore
+import MelonDSDeltaCore
+
 import Harmony
 
 public extension Game
 {
     static let melonDSBIOSIdentifier = "com.rileytestut.MelonDSDeltaCore.BIOS"
+    static let melonDSDSiBIOSIdentifier = "com.rileytestut.MelonDSDeltaCore.DSiBIOS"
 }
 
 @objc(Game)
@@ -21,7 +24,7 @@ public class Game: _Game, GameProtocol
 {
     public var fileURL: URL {
         var fileURL: URL!
-        
+        //通过将指定的路径组件附加到 self 来返回 URL
         self.managedObjectContext?.performAndWait {
             fileURL = DatabaseManager.gamesDirectoryURL.appendingPathComponent(self.filename)
         }
@@ -42,12 +45,16 @@ public class Game: _Game, GameProtocol
                     // Recreate the stored URL relative to current sandbox location.
                     artworkURL = URL(fileURLWithPath: unwrappedArtworkURL.relativePath, relativeTo: DatabaseManager.gamesDirectoryURL)
                 }
-                else if unwrappedArtworkURL.host?.lowercased() == "img.gamefaqs.net", var components = URLComponents(url: unwrappedArtworkURL, resolvingAgainstBaseURL: false)
+                else if let host = unwrappedArtworkURL.host?.lowercased(), host == "img.gamefaqs.net" || host == "gamefaqs1.cbsistatic.com",
+                        var components = URLComponents(url: unwrappedArtworkURL, resolvingAgainstBaseURL: false)
                 {
                     // Quick fix for broken album artwork URLs due to host change.
-                    components.host = "gamefaqs1.cbsistatic.com"
+                    components.host = "gamefaqs.gamespot.com"
                     components.scheme = "https"
                     
+                    let updatedPath = "/a" + components.path
+                    components.path = updatedPath
+                    
                     if let url = components.url
                     {
                         artworkURL = url
@@ -95,11 +102,17 @@ extension Game
         
         guard let managedObjectContext = self.managedObjectContext else { return }
                 
+        // If filename == empty string (e.g. during merge), ignore this deletion.
+        // Otherwise, we may accidentally delete the entire Games directory!
+        guard !self.filename.isEmpty else { return }
+        
         // If a game with the same identifier is also currently being inserted, Core Data is more than likely resolving a conflict by deleting the previous instance
         // In this case, we make sure we DON'T delete the game file + misc other Core Data relationships, or else we'll just lose all that data
         guard !managedObjectContext.insertedObjects.contains(where: { ($0 as? Game)?.identifier == self.identifier }) else { return }
         
-        guard FileManager.default.fileExists(atPath: self.fileURL.path) else { return }
+        // Double-check fileURL is NOT actually a directory, which we should never delete.
+        var isDirectory: ObjCBool = false
+        guard FileManager.default.fileExists(atPath: self.fileURL.path, isDirectory: &isDirectory), !isDirectory.boolValue else { return }
         
         do
         {
@@ -141,12 +154,42 @@ extension Game: Syncable
     }
     
     public var syncableFiles: Set<File> {
-        let gameFile = File(identifier: "game", fileURL: self.fileURL)
+        let artworkURL: URL
+        
+        if let fileURL = self.artworkURL, fileURL.isFileURL
+        {
+            artworkURL = fileURL
+        }
+        else
+        {
+            artworkURL = DatabaseManager.artworkURL(for: self)
+        }
         
-        let artworkURL = DatabaseManager.artworkURL(for: self)
         let artworkFile = File(identifier: "artwork", fileURL: artworkURL)
                 
-        return [gameFile, artworkFile]
+        switch self.identifier
+        {
+        case Game.melonDSBIOSIdentifier:
+            let bios7File = File(identifier: "bios7", fileURL: MelonDSEmulatorBridge.shared.bios7URL)
+            let bios9File = File(identifier: "bios9", fileURL: MelonDSEmulatorBridge.shared.bios9URL)
+            let firmwareFile = File(identifier: "firmware", fileURL: MelonDSEmulatorBridge.shared.firmwareURL)
+            
+            return [artworkFile, bios7File, bios9File, firmwareFile]
+            
+        case Game.melonDSDSiBIOSIdentifier:
+            let bios7File = File(identifier: "bios7", fileURL: MelonDSEmulatorBridge.shared.dsiBIOS7URL)
+            let bios9File = File(identifier: "bios9", fileURL: MelonDSEmulatorBridge.shared.dsiBIOS9URL)
+            let firmwareFile = File(identifier: "firmware", fileURL: MelonDSEmulatorBridge.shared.dsiFirmwareURL)
+            
+            // DSi NAND is ~240MB, so don't sync for now until Harmony can selectively download files.
+            // let nandFile = File(identifier: "nand", fileURL: MelonDSEmulatorBridge.shared.dsiNANDURL)
+            
+            return [artworkFile, bios7File, bios9File, firmwareFile]
+            
+        default:
+            let gameFile = File(identifier: "game", fileURL: self.fileURL)
+            return [artworkFile, gameFile]
+        }
     }
     
     public var syncableRelationships: Set<AnyKeyPath> {
@@ -157,7 +200,13 @@ extension Game: Syncable
         return self.name
     }
     
-    public var isSyncingEnabled: Bool {
-        return self.identifier != Game.melonDSBIOSIdentifier
+    public func awakeFromSync(_ record: AnyRecord) throws
+    {
+        guard let gameCollection = self.gameCollection else { throw SyncValidationError.incorrectGameCollection(nil) }
+        
+        if gameCollection.identifier != self.type.rawValue
+        {
+            throw SyncValidationError.incorrectGameCollection(gameCollection.name)
+        }
     }
 }

Delta/Database/Model/Human/GameSave.swift

@@ -8,6 +8,8 @@
 
 import Foundation
 
+import GBCDeltaCore
+
 import Harmony
 
 @objc(GameSave)
@@ -28,7 +30,7 @@ extension GameSave: Syncable
     }
     
     public var syncableKeys: Set<AnyKeyPath> {
-        return [\GameSave.modifiedDate]
+        return [\GameSave.modifiedDate, \GameSave.sha1]
     }
     
     public var syncableRelationships: Set<AnyKeyPath> {
@@ -51,7 +53,9 @@ extension GameSave: Syncable
     
     public var syncableMetadata: [HarmonyMetadataKey : String] {
         guard let game = self.game else { return [:] }
-        return [.gameID: game.identifier, .gameName: game.name]
+        
+        // Use self.identifier to always link with exact matching game.
+        return [.gameID: self.identifier, .gameName: game.name]
     }
     
     public var syncableLocalizedName: String? {
@@ -62,6 +66,51 @@ extension GameSave: Syncable
         // self.game may be nil if being downloaded, so don't enforce it.
         // guard let identifier = self.game?.identifier else { return false }
         
-        return self.game?.identifier != Game.melonDSBIOSIdentifier
+        return self.game?.identifier != Game.melonDSBIOSIdentifier && self.game?.identifier != Game.melonDSDSiBIOSIdentifier
+    }
+    
+    public func awakeFromSync(_ record: AnyRecord) throws
+    {
+        do
+        {
+            guard let game = self.game else { throw SyncValidationError.incorrectGame(nil) }
+            
+            if game.identifier != self.identifier
+            {
+                let fetchRequest = GameSave.fetchRequest()
+                fetchRequest.predicate = NSPredicate(format: "%K == %@", #keyPath(GameSave.identifier), game.identifier)
+                
+                if let misplacedGameSave = try self.managedObjectContext?.fetch(fetchRequest).first, misplacedGameSave.game == nil
+                {
+                    // Relink game with its correct gameSave, in case we accidentally misplaced it.
+                    // Otherwise, corrupted records might displace already-downloaded GameSaves
+                    // due to automatic Core Data relationship propagation, despite us throwing error.
+                    game.gameSave = misplacedGameSave
+                }
+                else
+                {
+                    // Either there is no misplacedGameSave, or there is but it's linked to another game somehow.
+                    game.gameSave = nil
+                }
+                
+                throw SyncValidationError.incorrectGame(game.name)
+            }
+        }
+        catch let error as SyncValidationError
+        {
+            guard SyncManager.shared.ignoredCorruptedRecordIDs.contains(record.recordID) else { throw error }
+            
+            let fetchRequest = Game.fetchRequest()
+            fetchRequest.predicate = NSPredicate(format: "%K == %@", #keyPath(Game.identifier), self.identifier)
+            
+            if let correctGame = try self.managedObjectContext?.fetch(fetchRequest).first
+            {
+                self.game = correctGame
+            }
+            else
+            {
+                throw ValidationError.nilRelationshipObjects(keys: [#keyPath(GameSave.game)])
+            }
+        }
     }
 }

Delta/Database/Model/Human/SaveState.swift

@@ -128,24 +128,29 @@ extension SaveState: Syncable
         // self.game may be nil if being downloaded, so don't enforce it.
         // guard let identifier = self.game?.identifier else { return false }
         
-        let isSyncingEnabled = (self.type != .auto && self.type != .quick) && (self.game?.identifier != Game.melonDSBIOSIdentifier)
+        let isSyncingEnabled = (self.type != .auto && self.type != .quick) && (self.game?.identifier != Game.melonDSBIOSIdentifier && self.game?.identifier != Game.melonDSDSiBIOSIdentifier)
         return isSyncingEnabled
     }
     
     public var syncableMetadata: [HarmonyMetadataKey : String] {
         guard let game = self.game else { return [:] }
-        return [.gameID: game.identifier, .gameName: game.name, .coreID: self.coreIdentifier].compactMapValues { $0 }
+        return [.gameID: game.identifier, .gameName: game.name, .coreID: self.coreIdentifier, .verifiedGameID: game.identifier].compactMapValues { $0 }
     }
     
     public var syncableLocalizedName: String? {
         return self.localizedName
     }
     
-    public func awakeFromSync(_ record: AnyRecord)
+    public func awakeFromSync(_ record: AnyRecord) throws
     {
-        guard self.coreIdentifier == nil else { return }
-        guard let game = self.game, let system = System(gameType: game.type) else { return }
+        let verifiedGameID = record.remoteMetadata?[.verifiedGameID]
         
+        do
+        {
+            guard let game = self.game else { return }
+            
+            if let system = System(gameType: game.type), self.coreIdentifier == nil
+            {
                 if let coreIdentifier = record.remoteMetadata?[.coreID]
                 {
                     // SaveState was synced to older version of Delta and lost its coreIdentifier,
@@ -161,4 +166,29 @@ extension SaveState: Syncable
                     }
                 }
             }
+            
+            if let verifiedGameID, verifiedGameID != game.identifier
+            {
+                // Game does not match verified game ID, which most likely means
+                // this SaveState was reviewed + fixed on another device, but not uploaded.
+                throw SyncValidationError.incorrectGame(game.name)
+            }
+        }
+        catch let error as SyncValidationError
+        {
+            guard let verifiedGameID, SyncManager.shared.ignoredCorruptedRecordIDs.contains(record.recordID) else { throw error }
+            
+            let fetchRequest = Game.fetchRequest()
+            fetchRequest.predicate = NSPredicate(format: "%K == %@", #keyPath(Game.identifier), verifiedGameID)
+            
+            if let correctGame = try self.managedObjectContext?.fetch(fetchRequest).first
+            {
+                self.game = correctGame
+            }
+            else
+            {
+                throw ValidationError.nilRelationshipObjects(keys: [#keyPath(GameSave.game)])
+            }
+        }
+    }
 }

Delta/Database/Model/Machine/_GameSave.swift

@@ -18,6 +18,8 @@ public class _GameSave: NSManagedObject
 
     @NSManaged public var modifiedDate: Date
 
+    @NSManaged public var sha1: String?
+
     // MARK: - Relationships
 
     @NSManaged public var game: Game?

Delta/Database/Model/Misc/ControllerSkinConfigurations.h

@@ -9,16 +9,35 @@
 #ifndef ControllerSkinConfigurations_h
 #define ControllerSkinConfigurations_h
 
+// Every possible (supported) combination of traits.
 typedef NS_OPTIONS(int16_t, ControllerSkinConfigurations)
 {
-    ControllerSkinConfigurationStandardPortrait   = 1 << 0,
-    ControllerSkinConfigurationStandardLandscape  = 1 << 1,
+    /* iPhone */
+    ControllerSkinConfigurationiPhoneStandardPortrait NS_SWIFT_NAME(iphoneStandardPortrait)        = 1 << 0,
+    ControllerSkinConfigurationiPhoneStandardLandscape NS_SWIFT_NAME(iphoneStandardLandscape)      = 1 << 1,
     
-    ControllerSkinConfigurationSplitViewPortrait    = 1 << 2,
-    ControllerSkinConfigurationSplitViewLandscape   = 1 << 3,
+    // iPhone doesn't support Split View
+    // ControllerSkinConfigurationiPhoneSplitViewPortrait                                          = 1 << 2,
+    // ControllerSkinConfigurationiPhoneSplitViewLandscape                                         = 1 << 3,
     
-    ControllerSkinConfigurationEdgeToEdgePortrait    = 1 << 4,
-    ControllerSkinConfigurationEdgeToEdgeLandscape   = 1 << 5,
+    ControllerSkinConfigurationiPhoneEdgeToEdgePortrait NS_SWIFT_NAME(iphoneEdgeToEdgePortrait)    = 1 << 4,
+    ControllerSkinConfigurationiPhoneEdgeToEdgeLandscape NS_SWIFT_NAME(iphoneEdgeToEdgeLandscape)  = 1 << 5,
+    
+    
+    /* iPad */
+    ControllerSkinConfigurationiPadStandardPortrait NS_SWIFT_NAME(ipadStandardPortrait)            = 1 << 6,
+    ControllerSkinConfigurationiPadStandardLandscape NS_SWIFT_NAME(ipadStandardLandscape)          = 1 << 7,
+
+    ControllerSkinConfigurationiPadSplitViewPortrait NS_SWIFT_NAME(ipadSplitViewPortrait)          = 1 << 2, // Backwards compatible with legacy ControllerSkinConfigurationSplitViewPortrait
+    ControllerSkinConfigurationiPadSplitViewLandscape NS_SWIFT_NAME(ipadSplitViewLandscape)        = 1 << 3, // Backwards compatible with legacy ControllerSkinConfigurationSplitViewLandscape
+    
+    ControllerSkinConfigurationiPadEdgeToEdgePortrait NS_SWIFT_NAME(ipadEdgeToEdgePortrait)        = 1 << 8,
+    ControllerSkinConfigurationiPadEdgeToEdgeLandscape NS_SWIFT_NAME(ipadEdgeToEdgeLandscape)      = 1 << 9,
+    
+    
+    /* TV */
+    ControllerSkinConfigurationTVStandardPortrait                                                  = 1 << 10,
+    ControllerSkinConfigurationTVStandardLandscape                                                 = 1 << 11,
 };
 
 #endif /* ControllerSkinConfigurations_h */

Delta/Database/OpenVGDB/GameMetadata.swift

@@ -11,15 +11,17 @@ import Foundation
 // Must be an NSObject subclass so it can be used with RSTCellContentDataSource.
 class GameMetadata: NSObject
 {
-    let identifier: Int
+    let releaseID: Int
+    let romID: Int
     
     let name: String?
     let artworkURL: URL?
     
-    init(identifier: Int, name: String?, artworkURL: URL?)
+    init(releaseID: Int, romID: Int, name: String?, artworkURL: URL?)
     {
+        self.releaseID = releaseID
+        self.romID = romID
         self.name = name
-        self.identifier = identifier
         self.artworkURL = artworkURL
     }
 }
@@ -27,13 +29,13 @@ class GameMetadata: NSObject
 extension GameMetadata
 {
     override var hash: Int {
-        return self.identifier.hashValue
+        return self.releaseID.hashValue ^ self.romID.hashValue
     }
     
     override func isEqual(_ object: Any?) -> Bool
     {
         guard let metadata = object as? GameMetadata else { return false }
         
-        return self.identifier == metadata.identifier
+        return self.releaseID == metadata.releaseID && self.romID == metadata.romID
     }
 }

Delta/Database/OpenVGDB/GamesDatabase.swift

@@ -57,16 +57,26 @@ extension VirtualTable
 
 extension GamesDatabase
 {
-    enum Error: Swift.Error
+    enum Error: LocalizedError
     {
         case doesNotExist
-        case connection(Swift.Error)
+        
+        var errorDescription: String? {
+            switch self
+            {
+            case .doesNotExist:
+                return NSLocalizedString("The SQLite database could not be found.", comment: "")
+            }
+        }
     }
 }
 
 class GamesDatabase
 {
-    static let version = -1
+    static let version = 3
+    static var previousVersion: Int? {
+        return UserDefaults.standard.previousGamesDatabaseVersion
+    }
     
     private let connection: Connection
     
@@ -80,7 +90,7 @@ class GamesDatabase
         }
         catch
         {
-            throw Error.connection(error)
+            throw error
         }
         
         self.invalidateVirtualTableIfNeeded()
@@ -89,10 +99,11 @@ class GamesDatabase
     func metadataResults(forGameName gameName: String) -> [GameMetadata]
     {
         let releaseID = Expression<Any>.releaseID
+        let romID = Expression<Any>.romID
         let name = Expression<Any>.name
         let artworkAddress = Expression<Any>.artworkAddress
         
-        let query = VirtualTable.search.select(releaseID, name, artworkAddress).filter(name.match(gameName + "*"))
+        let query = VirtualTable.search.select(releaseID, romID, name, artworkAddress).filter(name.match(gameName + "*"))
         
         do
         {
@@ -111,7 +122,7 @@ class GamesDatabase
                 }
                 
 
-                let metadata = GameMetadata(identifier: row[releaseID], name: row[name], artworkURL: artworkURL)
+                let metadata = GameMetadata(releaseID: row[releaseID], romID: row[romID], name: row[name], artworkURL: artworkURL)
                 return metadata
             }
             
@@ -145,7 +156,7 @@ class GamesDatabase
         let romID = Expression<Any>.romID
         
         let gameHash = game.identifier.uppercased()
-        let query = Table.roms.select(releaseID, name, artworkAddress).filter(sha1Hash == gameHash).join(Table.releases, on: Table.roms[romID] == Table.releases[romID])
+        let query = Table.roms.select(releaseID, name, artworkAddress, Table.roms[romID]).filter(sha1Hash == gameHash).join(Table.releases, on: Table.roms[romID] == Table.releases[romID])
         
         do
         {
@@ -161,7 +172,7 @@ class GamesDatabase
                     artworkURL = nil
                 }
                 
-                let metadata = GameMetadata(identifier: row[releaseID], name: row[name], artworkURL: artworkURL)
+                let metadata = GameMetadata(releaseID: row[releaseID], romID: row[Table.roms[romID]], name: row[name], artworkURL: artworkURL)
                 return metadata
             }
         }
@@ -197,12 +208,13 @@ private extension GamesDatabase
         let name = Expression<Any>.name
         let artworkAddress = Expression<Any>.artworkAddress
         let releaseID = Expression<Any>.releaseID
+        let romID = Expression<Any>.romID
         
         do
         {
-            try self.connection.run(VirtualTable.search.create(.FTS4([releaseID, name, artworkAddress], tokenize: .Unicode61())))
+            try self.connection.run(VirtualTable.search.create(.FTS4([releaseID, romID, name, artworkAddress], tokenize: .Unicode61())))
             
-            let update = VirtualTable.search.insert(Table.releases.select(releaseID, name, artworkAddress))
+            let update = VirtualTable.search.insert(Table.releases.select(releaseID, romID, name, artworkAddress))
             _ = try self.connection.run(update)
         }
         catch

Delta/Database/Repair/GamePickerViewController.swift

@@ -0,0 +1,126 @@
+//
+//  GamePickerViewController.swift
+//  Delta
+//
+//  Created by Riley Testut on 8/4/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import UIKit
+
+import Roxas
+
+class GamePickerViewController: UITableViewController
+{
+    private lazy var dataSource = self.makeDataSource()
+    
+    var gameHandler: ((Game?) -> Void)?
+    
+    init()
+    {
+        super.init(style: .insetGrouped)
+    }
+    
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+    
+    override func viewDidLoad()
+    {
+        super.viewDidLoad()
+        
+        self.navigationController?.delegate = self
+        
+        self.dataSource.proxy = self
+        self.tableView.dataSource = self.dataSource
+        self.tableView.prefetchDataSource = self.dataSource
+        
+        self.tableView.register(UITableViewCell.self, forCellReuseIdentifier: RSTCellContentGenericCellIdentifier)
+        
+        self.navigationItem.title = NSLocalizedString("Choose Game", comment: "")
+        self.navigationItem.searchController = self.dataSource.searchController
+        self.navigationItem.hidesSearchBarWhenScrolling = false
+    }
+}
+
+private extension GamePickerViewController
+{
+    func makeDataSource() -> RSTFetchedResultsTableViewPrefetchingDataSource<Game, UIImage>
+    {
+        let fetchRequest = Game.fetchRequest()
+        fetchRequest.propertiesToFetch = [#keyPath(Game.name), #keyPath(Game.identifier), #keyPath(Game.artworkURL)]
+        fetchRequest.sortDescriptors = [NSSortDescriptor(keyPath: \Game.gameCollection?.index, ascending: true), NSSortDescriptor(keyPath: \Game.name, ascending: true)]
+        
+        let fetchedResultsController = NSFetchedResultsController(fetchRequest: fetchRequest, managedObjectContext: DatabaseManager.shared.viewContext, sectionNameKeyPath: #keyPath(Game.gameCollection.name), cacheName: nil)
+        let dataSource = RSTFetchedResultsTableViewPrefetchingDataSource<Game, UIImage>(fetchedResultsController: fetchedResultsController)
+        dataSource.cellConfigurationHandler = { (cell, game, indexPath) in
+            var configuration = UIListContentConfiguration.valueCell()
+            configuration.prefersSideBySideTextAndSecondaryText = false
+            
+            configuration.text = game.name
+            
+            configuration.secondaryText = game.identifier
+            configuration.secondaryTextProperties.font = .preferredFont(forTextStyle: .caption1)
+            
+            configuration.image = UIImage(named: "BoxArt")
+            configuration.imageProperties.maximumSize = CGSize(width: 48, height: 48)
+            configuration.imageProperties.reservedLayoutSize = CGSize(width: 48, height: 48)
+            configuration.imageProperties.cornerRadius = 4
+            
+            cell.contentConfiguration = configuration
+        }
+        dataSource.prefetchHandler = { (game, indexPath, completionHandler) in
+            guard let artworkURL = game.artworkURL else {
+                completionHandler(nil, nil)
+                return nil
+            }
+            
+            let imageOperation = LoadImageURLOperation(url: artworkURL)
+            imageOperation.resultHandler = { (image, error) in
+                completionHandler(image, error)
+            }
+            
+            return imageOperation
+        }
+        dataSource.prefetchCompletionHandler = { (cell, image, indexPath, error) in
+            guard let image = image, var config = cell.contentConfiguration as? UIListContentConfiguration else { return }
+            config.image = image
+            cell.contentConfiguration = config
+        }
+        
+        dataSource.searchController.searchableKeyPaths = [#keyPath(Game.name), #keyPath(Game.identifier)]
+        
+        return dataSource
+    }
+}
+
+extension GamePickerViewController
+{
+    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)
+    {
+        let game = self.dataSource.item(at: indexPath)
+        self.gameHandler?(game)
+        
+        self.navigationController?.delegate = nil // Prevent calling navigationController(_:willShow:)
+        self.navigationController?.popViewController(animated: true)
+    }
+    
+    override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String?
+    {
+        guard let section = self.dataSource.fetchedResultsController.sections?[section], !section.name.isEmpty else {
+            return NSLocalizedString("Unknown System", comment: "")
+        }
+        
+        return section.name
+    }
+}
+
+extension GamePickerViewController: UINavigationControllerDelegate
+{
+    func navigationController(_ navigationController: UINavigationController, didShow viewController: UIViewController, animated: Bool)
+    {
+        guard viewController != self else { return }
+        
+        self.gameHandler?(nil)
+    }
+}

Delta/Database/Repair/RepairDatabaseViewController.swift

@@ -0,0 +1,479 @@
+//
+//  RepairDatabaseViewController.swift
+//  Delta
+//
+//  Created by Riley Testut on 8/4/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import UIKit
+import OSLog
+
+import DeltaCore
+
+import Roxas
+import Harmony
+
+private extension String
+{
+    func sanitizedFilePath() -> String
+    {
+        let sanitizedFilePath = self.components(separatedBy: .urlFilenameAllowed.inverted).joined()
+        return sanitizedFilePath
+    }
+}
+
+class RepairDatabaseViewController: UIViewController
+{
+    var completionHandler: (() -> Void)?
+    
+    private var _viewDidAppear = false
+    
+    private lazy var managedObjectContext = DatabaseManager.shared.newBackgroundSavingViewContext()
+    private lazy var gameSavesContext = DatabaseManager.shared.newBackgroundContext(withParent: self.managedObjectContext)
+    
+    private var gamesByID: [String: Game]?
+    
+    private lazy var backupsDirectory = FileManager.default.documentsDirectory.appendingPathComponent("Backups")
+    private lazy var gameSavesDirectory = DatabaseManager.gamesDirectoryURL
+    
+    override func viewDidLoad()
+    {
+        super.viewDidLoad()
+        
+        self.view.backgroundColor = .systemBackground
+        
+        self.isModalInPresentation = true
+        
+        let placeholderView = RSTPlaceholderView()
+        placeholderView.textLabel.text = NSLocalizedString("Verifying Database…", comment: "")
+        placeholderView.detailTextLabel.text = nil
+        placeholderView.activityIndicatorView.startAnimating()
+        placeholderView.stackView.spacing = 15
+        self.view.addSubview(placeholderView, pinningEdgesWith: .zero)
+    }
+    
+    override func viewDidAppear(_ animated: Bool)
+    {
+        super.viewDidAppear(animated)
+        
+        if !_viewDidAppear
+        {
+            self.repairDatabase()
+        }
+        
+        _viewDidAppear = true
+    }
+}
+
+private extension RepairDatabaseViewController
+{
+    func repairDatabase()
+    {
+        Logger.database.info("Begin repairing database...")
+        
+        self.repairGames { result in
+            switch result
+            {
+            case .failure(let error):
+                DispatchQueue.main.async {
+                    let alertController = UIAlertController(title: "Unable to Repair Games", error: error)
+                    self.present(alertController, animated: true)
+                }
+                
+            case .success:
+                self.repairGameSaves { result in
+                    DispatchQueue.main.async {
+                        switch result
+                        {
+                        case .failure(let error):
+                            let alertController = UIAlertController(title: "Unable to Repair Save Files", error: error)
+                            self.present(alertController, animated: true)
+                            
+                        case .success:
+                            self.showReviewViewController()
+                        }
+                    }
+                }
+            }
+        }
+    }
+    
+    func repairGames(completion: @escaping (Result<Void, Error>) -> Void)
+    {
+        self.managedObjectContext.perform {
+            do
+            {
+                let fetchRequest = Game.fetchRequest()
+                fetchRequest.propertiesToFetch = [#keyPath(Game.type)]
+                fetchRequest.relationshipKeyPathsForPrefetching = [#keyPath(Game.gameCollection)]
+                
+                let allGames = try self.managedObjectContext.fetch(fetchRequest)
+                let affectedGames = allGames.filter { $0.type.rawValue != $0.gameCollection?.identifier }
+                
+                let gameCollections = try self.managedObjectContext.fetch(GameCollection.fetchRequest())
+                let gameCollectionsByID = gameCollections.reduce(into: [:]) { $0[$1.identifier] = $1 }
+                
+                for game in affectedGames
+                {
+                    let gameCollection = gameCollectionsByID[game.type.rawValue]
+                    game.gameCollection = gameCollection
+                    
+                    Logger.database.notice("Re-associating “\(game.name, privacy: .public)” with GameCollection: \(gameCollection?.identifier ?? "nil", privacy: .public)")
+                }
+                
+                try self.managedObjectContext.save()
+                
+                completion(.success)
+            }
+            catch
+            {
+                completion(.failure(error))
+            }
+        }
+    }
+    
+    func repairGameSaves(completion: @escaping (Result<Void, Error>) -> Void)
+    {
+        self.managedObjectContext.perform {
+            do
+            {
+                // Fetch GameSaves that don't have same identifier as their Game,
+                // OR GameSaves that have a non-nil SHA1 hash.
+                //
+                // This covers GameSaves connected to wrong games and GameSaves with nil Games,
+                // as well as any GameSaves modified since last beta (which we assume are corrupted).
+                
+                let fetchRequest = GameSave.fetchRequest()
+                fetchRequest.predicate = NSPredicate(format: "(%K == nil) OR (%K != %K) OR (%K != nil)",
+                                                     #keyPath(GameSave.game),
+                                                     #keyPath(GameSave.identifier), #keyPath(GameSave.game.identifier),
+                                                     #keyPath(GameSave.sha1))
+                
+                let gameSaves = try self.managedObjectContext.fetch(fetchRequest)
+                let gameSavesByID = gameSaves.reduce(into: [:]) { $0[$1.identifier] = $1 }
+                
+                let gamesFetchRequest = Game.fetchRequest()
+                gamesFetchRequest.predicate = NSPredicate(format: "%K IN %@", #keyPath(Game.identifier), Set(gameSavesByID.keys))
+                
+                let games = try self.managedObjectContext.fetch(gamesFetchRequest)
+                self.gamesByID = games.reduce(into: [:]) { $0[$1.identifier] = $1 }
+                
+                let savesBackupsDirectory = self.backupsDirectory.appendingPathComponent("Saves")
+                try FileManager.default.createDirectory(at: savesBackupsDirectory, withIntermediateDirectories: true)
+                
+                var conflictedGames = Set<Game>()
+                
+                for gameSave in gameSaves
+                {
+                    let expectedGame = self.repair(gameSave, backupsDirectory: savesBackupsDirectory)
+                    
+                    // At this point, gameSave is only updated in gameSavesContext,
+                    // so gameSave here still points to previous game,
+                    
+                    if let game = gameSave.game
+                    {
+                        Logger.database.notice("The save file for “\(game.name, privacy: .public)” is potentially corrupted, writing to conflicts.txt")
+                        conflictedGames.insert(game)
+                    }
+                    
+                    if let expectedGame
+                    {
+                        Logger.database.notice("The save file for “\(expectedGame.name, privacy: .public)” is potentially corrupted, writing to conflicts.txt")
+                        conflictedGames.insert(expectedGame)
+                    }
+                }
+                
+                try self.gameSavesContext.performAndWait {
+                    try self.gameSavesContext.save()
+                }
+                
+                try self.managedObjectContext.save()
+                
+                let outputURL = self.backupsDirectory.appendingPathComponent("conflicts.txt")
+                
+                let conflictsLog = conflictedGames.map { $0.name + " (" + $0.identifier + ")" }.sorted().joined(separator: "\n")
+                try conflictsLog.write(to: outputURL, atomically: true, encoding: .utf8)
+                
+                completion(.success)
+            }
+            catch
+            {
+                completion(.failure(error))
+            }
+        }
+    }
+    
+    // Returns expectedGame, but in managedObjectContext (not gameSavesContext)
+    func repair(_ gameSave: GameSave, backupsDirectory: URL) -> Game?
+    {
+        Logger.database.notice("Repairing GameSave \(gameSave.identifier, privacy: .public)...")
+        
+        guard let expectedGame = self.gamesByID?[gameSave.identifier] else {
+            // Game doesn't exist, so we'll back up save file and delete record.
+            
+            Logger.database.warning("Orphaning GameSave \(gameSave.identifier, privacy: .public) due to no matching game.")
+            
+            do
+            {
+                try self.backup(gameSave, for: nil, to: backupsDirectory)
+            }
+            catch
+            {
+                Logger.database.error("Failed to back up save file for orphaned GameSave \(gameSave.identifier, privacy: .public). \(error, privacy: .public)")
+            }
+            
+            self.gameSavesContext.performAndWait {
+                let gameSave = self.gameSavesContext.object(with: gameSave.objectID) as! GameSave
+                gameSave.game = nil
+            }
+            
+            return nil
+        }
+        
+        let misplacedGameSave: GameSave?
+        if let otherGameSave = expectedGame.gameSave, otherGameSave != gameSave
+        {
+            misplacedGameSave = otherGameSave
+            
+            Logger.database.info("GameSave \(gameSave.identifier, privacy: .public) will misplace \(otherGameSave.identifier, privacy: .public)")
+        }
+        else
+        {
+            misplacedGameSave = nil
+        }
+        
+        do
+        {
+            // Back up the save file gameSave (incorrectly) refers to, but name it after the _expected_ game.
+            try self.backup(gameSave, for: expectedGame, to: backupsDirectory)
+        }
+        catch
+        {
+            Logger.database.error("Failed to back up save file for GameSave \(gameSave.identifier, privacy: .public). Expected Game: \(expectedGame.identifier). \(error, privacy: .public)")
+        }
+        
+        // Ignore error if we can't hash file, not that big a deal.
+        let hash = try? RSTHasher.sha1HashOfFile(at: expectedGame.gameSaveURL)
+        
+        // Make changes on separate context so we don't change any relationships until we're finished.
+        // This allows us to refer to previous relationships.
+        self.gameSavesContext.performAndWait {
+            let gameSave = self.gameSavesContext.object(with: gameSave.objectID) as! GameSave
+            let expectedGame = self.gameSavesContext.object(with: expectedGame.objectID) as! Game
+            let misplacedGameSave: GameSave? = misplacedGameSave.map { self.gameSavesContext.object(with: $0.objectID) as! GameSave }
+            
+            if hash == gameSave.sha1
+            {
+                // .sav has same hash as GameSave SHA1,
+                // so we can relink without changes.
+                
+                Logger.database.info("GameSave \(gameSave.identifier, privacy: .public)'s hash matches .sav, relinking without changes.")
+            }
+            else if let misplacedGameSave
+            {
+                // GameSave data differs from actual .sav file,
+                // so copy metadata from misplacedGameSave.
+                
+                Logger.database.info("GameSave \(gameSave.identifier, privacy: .public)'s hash does NOT match .sav, ignoring misplaced GameSave \(misplacedGameSave.identifier, privacy: .public).")
+                
+                // Not worth potential conflicts.
+                // gameSave.sha1 = misplacedGameSave.sha1
+                // gameSave.modifiedDate = misplacedGameSave.modifiedDate
+            }
+            else
+            {
+                // GameSave data differs from actual .sav file,
+                // so copy metadata from disk.
+                Logger.database.info("GameSave \(gameSave.identifier, privacy: .public)'s hash does NOT match .sav, ignoring.")
+                
+                // Not worth potential conflicts.
+                // let modifiedDate = try? FileManager.default.attributesOfItem(atPath: expectedGame.gameSaveURL.path)[.modificationDate] as? Date
+                // gameSave.sha1 = hash
+                // gameSave.modifiedDate = modifiedDate ?? Date()
+            }
+            
+            gameSave.game = expectedGame
+        }
+        
+        return expectedGame
+    }
+    
+    func backup(_ gameSave: GameSave, for expectedGame: Game?, to backupsDirectory: URL) throws
+    {
+        Logger.database.notice("Backing up GameSave \(gameSave.identifier, privacy: .public). Expected Game: \(expectedGame?.name ?? "nil", privacy: .public)")
+        
+        if let game = gameSave.game
+        {
+            // GameSave is linked with incorrect game.
+            
+            // Prefer using expectedGame's saveFileExtension over game's.
+            let saveFileExtension: String
+            if let deltaCore = Delta.core(for: expectedGame?.type ?? game.type)
+            {
+                saveFileExtension = deltaCore.gameSaveFileExtension
+            }
+            else
+            {
+                saveFileExtension = "sav"
+            }
+            
+            // 1. Backup existing file at `game`'s expected save file location
+            if FileManager.default.fileExists(atPath: game.gameSaveURL.path)
+            {
+                // Filename = expectedGame.name? + game.identifier
+                
+                let filename: String
+                if let expectedGame
+                {
+                    filename = expectedGame.name + "_" + game.identifier
+                }
+                else
+                {
+                    filename = game.identifier
+                }
+                
+                let sanitizedFilename = filename.sanitizedFilePath()
+                
+                let destinationURL = backupsDirectory.appendingPathComponent(sanitizedFilename).appendingPathExtension(saveFileExtension)
+                try FileManager.default.copyItem(at: game.gameSaveURL, to: destinationURL, shouldReplace: true)
+                
+                Logger.database.notice("Backed up save file \(game.gameSaveURL.lastPathComponent, privacy: .public) to \(destinationURL.lastPathComponent, privacy: .public)")
+                
+                let rtcFileURL = game.gameSaveURL.deletingPathExtension().appendingPathExtension("rtc")
+                if FileManager.default.fileExists(atPath: rtcFileURL.path)
+                {
+                    let destinationURL = backupsDirectory.appendingPathComponent(sanitizedFilename).appendingPathExtension("rtc")
+                    try FileManager.default.copyItem(at: rtcFileURL, to: destinationURL, shouldReplace: true)
+                    
+                    Logger.database.notice("Backed up RTC save file \(rtcFileURL.lastPathComponent, privacy: .public) to \(destinationURL.lastPathComponent, privacy: .public)")
+                }
+            }
+            
+            // 2. Backup existing file at `expectedGame`'s save file location
+            if let expectedGame, FileManager.default.fileExists(atPath: expectedGame.gameSaveURL.path)
+            {
+                // Filename = expectedGame.name + (misplacedGameSave.identifier ?? expectedGame.identifier)
+                
+                let filename = expectedGame.name + "_" + (expectedGame.gameSave?.identifier ?? expectedGame.identifier)
+                let sanitizedFilename = filename.sanitizedFilePath()
+                
+                let destinationURL = backupsDirectory.appendingPathComponent(sanitizedFilename).appendingPathExtension(saveFileExtension)
+                try FileManager.default.copyItem(at: expectedGame.gameSaveURL, to: destinationURL, shouldReplace: true)
+                
+                Logger.database.notice("Backed up expected save file \(expectedGame.gameSaveURL.lastPathComponent, privacy: .public) to \(destinationURL.lastPathComponent, privacy: .public)")
+                
+                let rtcFileURL = expectedGame.gameSaveURL.deletingPathExtension().appendingPathExtension("rtc")
+                if FileManager.default.fileExists(atPath: rtcFileURL.path)
+                {
+                    let destinationURL = backupsDirectory.appendingPathComponent(sanitizedFilename).appendingPathExtension("rtc")
+                    try FileManager.default.copyItem(at: rtcFileURL, to: destinationURL, shouldReplace: true)
+                    
+                    Logger.database.notice("Backed up expected RTC save file \(rtcFileURL.lastPathComponent, privacy: .public) to \(destinationURL.lastPathComponent, privacy: .public)")
+                }
+            }
+        }
+        else
+        {
+            @discardableResult
+            func backUp(_ saveFileURL: URL) throws -> Bool
+            {
+                guard FileManager.default.fileExists(atPath: saveFileURL.path) else { return false }
+                
+                // Filename = expectedGame.name? + gameSave.identifier
+                
+                let filename: String
+                if let expectedGame
+                {
+                    filename = expectedGame.name + "_" + gameSave.identifier
+                }
+                else
+                {
+                    filename = gameSave.identifier
+                }
+                
+                let sanitizedFilename = filename.sanitizedFilePath()
+                
+                let destinationURL = backupsDirectory.appendingPathComponent(sanitizedFilename).appendingPathExtension(saveFileURL.pathExtension)
+                try FileManager.default.copyItem(at: saveFileURL, to: destinationURL, shouldReplace: true)
+                
+                Logger.database.notice("Backed up discovered save file \(saveFileURL.lastPathComponent, privacy: .public) to \(destinationURL.lastPathComponent, privacy: .public)")
+                
+                return true
+            }
+            
+            // GameSave is _not_ linked to a Game, so instead we iterate through all save files on disk to find match.
+            let savURL = self.gameSavesDirectory.appendingPathComponent(gameSave.identifier).appendingPathExtension("sav")
+            let srmURL = self.gameSavesDirectory.appendingPathComponent(gameSave.identifier).appendingPathExtension("srm")
+            let dsvURL = self.gameSavesDirectory.appendingPathComponent(gameSave.identifier).appendingPathExtension("dsv")
+            
+            let saveFileURLs = [savURL, srmURL, dsvURL]
+            for saveFileURL in saveFileURLs
+            {
+                if try backUp(saveFileURL)
+                {
+                    break
+                }
+            }
+            
+            // ALWAYS attempt to back up RTC file.
+            let rtcURL = self.gameSavesDirectory.appendingPathComponent(gameSave.identifier).appendingPathExtension("rtc")
+            try backUp(rtcURL)
+        }
+    }
+    
+    func showReviewViewController()
+    {
+        Logger.database.info("Finished repairing Games and GameSaves, reviewing recent SaveStates...")
+        
+        let viewController = ReviewSaveStatesViewController()
+        viewController.filter = .sinceLastBeta
+        viewController.completionHandler = { [weak self] in
+            self?.finish()
+        }
+        self.navigationController?.pushViewController(viewController, animated: true)
+    }
+    
+    func finish()
+    {
+        Logger.database.info("Finished repairing database!")
+        
+        DispatchQueue.global(qos: .userInitiated).async {
+            if #available(iOS 15, *)
+            {
+                do
+                {
+                    let store = try OSLogStore(scope: .currentProcessIdentifier)
+                    
+                    // All logs since the app launched.
+                    let position = store.position(timeIntervalSinceLatestBoot: 0)
+                    
+                    let entries = try store.getEntries(at: position)
+                        .compactMap { $0 as? OSLogEntryLog }
+                        .filter { $0.subsystem == Logger.deltaSubsystem || $0.subsystem == Logger.harmonySubsystem }
+                        .map { "[\($0.date.formatted())] [\($0.level.localizedName)] \($0.composedMessage)" }
+                                    
+                    let outputURL = self.backupsDirectory.appendingPathComponent("repair.log")
+                    try FileManager.default.createDirectory(at: self.backupsDirectory, withIntermediateDirectories: true)
+                    
+                    let outputText = entries.joined(separator: "\n")
+                    try outputText.write(to: outputURL, atomically: true, encoding: .utf8)
+                }
+                catch
+                {
+                    print("Failed to export Harmony logs.", error)
+                }
+            }
+            
+            DispatchQueue.main.async {
+                let alertController = UIAlertController(title: NSLocalizedString("Database Repaired", comment: ""),
+                                                        message: NSLocalizedString("Some save files may still be corrupted and require you to restore an older version from the Delta Sync settings.\n\nA text file listing all affected games has been saved to “On My Device/Delta/Backups/conflicts.txt” in the Files app, alongside backups of any conflicted save files.", comment: ""),
+                                                        preferredStyle: .alert)
+                alertController.addAction(UIAlertAction(title: UIAlertAction.ok.title, style: UIAlertAction.ok.style) { _ in
+                    self.completionHandler?()
+                })
+                self.present(alertController, animated: true)
+            }
+        }
+    }
+}

Delta/Database/Repair/ReviewSaveStatesViewController.swift

@@ -0,0 +1,377 @@
+//
+//  ReviewSaveStatesViewController.swift
+//  Delta
+//
+//  Created by Riley Testut on 8/4/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import UIKit
+import OSLog
+
+import Harmony
+import Roxas
+
+extension ReviewSaveStatesViewController
+{
+    enum Filter
+    {
+        case recent
+        case all
+        case sinceLastBeta
+    }
+}
+
+extension RecordFlags
+{
+    static let isGameRelationshipVerified = RecordFlags(rawValue: 1 << 0)
+}
+
+class ReviewSaveStatesViewController: UITableViewController
+{
+    var filter: Filter = .recent {
+        didSet {
+            self.updateDataSource()
+        }
+    }
+    
+    var completionHandler: (() -> Void)?
+    
+    private lazy var managedObjectContext = DatabaseManager.shared.newBackgroundSavingViewContext()
+    
+    private lazy var dataSource = self.makeDataSource()
+    private lazy var descriptionDataSource = self.makeDescriptionDataSource()
+    private lazy var saveStatesDataSource = self.makeSaveStatesDataSource()
+    
+    private weak var _parentNavigationController: UINavigationController?
+    
+    init()
+    {
+        super.init(style: .insetGrouped)
+    }
+    
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+    
+    override func viewDidLoad()
+    {
+        super.viewDidLoad()
+                
+        self.dataSource.proxy = self
+        self.tableView.dataSource = self.dataSource
+        self.tableView.prefetchDataSource = self.dataSource
+        
+        self.tableView.register(UITableViewCell.self, forCellReuseIdentifier: RSTCellContentGenericCellIdentifier)
+        
+        let doneButton = UIBarButtonItem(barButtonSystemItem: .done, target: self, action: #selector(ReviewSaveStatesViewController.finish))
+        self.navigationItem.rightBarButtonItem = doneButton
+        
+        self.navigationItem.title = NSLocalizedString("Review Save States", comment: "")
+        
+        // Disable going back to RepairDatabaseViewController.
+        self.navigationItem.setHidesBackButton(true, animated: false)
+        self.navigationController?.interactivePopGestureRecognizer?.isEnabled = false
+    }
+    
+    override func viewWillAppear(_ animated: Bool)
+    {
+        super.viewWillAppear(animated)
+        
+        if let parent = self.parent, parent.navigationItem.title == nil
+        {
+            // Must change parent's navigationItem when we're contained in SwiftUI View.
+            parent.navigationItem.title = NSLocalizedString("Review Save States", comment: "")
+            parent.navigationItem.rightBarButtonItem = self.makeFilterButton()
+        }
+    }
+    
+    override func viewWillDisappear(_ animated: Bool)
+    {
+        super.viewWillDisappear(animated)
+        
+        _parentNavigationController = self.parent?.navigationController
+    }
+    
+    override func viewDidDisappear(_ animated: Bool)
+    {
+        super.viewDidDisappear(animated)
+        
+        switch self.filter
+        {
+        case .all, .recent:
+            if self.parent == nil || self.parent?.parent == nil
+            {
+                // Only finish if we're popped off navigation controller.
+                self.finish()
+            }
+            
+        case .sinceLastBeta: break
+        }
+    }
+}
+
+private extension ReviewSaveStatesViewController
+{
+    func makeDataSource() -> RSTCompositeTableViewPrefetchingDataSource<SaveState, UIImage>
+    {
+        let dataSource = RSTCompositeTableViewPrefetchingDataSource<SaveState, UIImage>(dataSources: [self.descriptionDataSource, self.saveStatesDataSource])
+        return dataSource
+    }
+    
+    func makeDescriptionDataSource() -> RSTDynamicTableViewPrefetchingDataSource<SaveState, UIImage>
+    {
+        let dataSource = RSTDynamicTableViewPrefetchingDataSource<SaveState, UIImage>()
+        dataSource.numberOfSectionsHandler = { 1 }
+        dataSource.numberOfItemsHandler = { _ in 0 }
+        return dataSource
+    }
+    
+    func makeSaveStatesDataSource() -> RSTFetchedResultsTableViewPrefetchingDataSource<SaveState, UIImage>
+    {
+        let fetchedResultsController = self.makeSaveStatesFetchedResultsController()
+        
+        let dataSource = RSTFetchedResultsTableViewPrefetchingDataSource<SaveState, UIImage>(fetchedResultsController: fetchedResultsController)
+        dataSource.cellConfigurationHandler = { (cell, saveState, indexPath) in
+            var configuration = UIListContentConfiguration.valueCell()
+            configuration.prefersSideBySideTextAndSecondaryText = false
+            
+            let fontDescriptor = UIFontDescriptor.preferredFontDescriptor(withTextStyle: .body).withSymbolicTraits(.traitBold) ?? .preferredFontDescriptor(withTextStyle: .body)
+            configuration.text = saveState.name ?? NSLocalizedString("Untitled", comment: "")
+            configuration.textProperties.font = UIFont(descriptor: fontDescriptor, size: 0)
+            
+            configuration.secondaryText = SaveState.localizedDateFormatter.string(from: saveState.modifiedDate)
+            configuration.secondaryTextProperties.font = .preferredFont(forTextStyle: .caption1)
+            
+            configuration.image = nil
+            configuration.imageProperties.maximumSize = CGSize(width: 80, height: 80)
+            configuration.imageProperties.reservedLayoutSize = CGSize(width: 80, height: 80)
+            configuration.imageProperties.cornerRadius = 6
+            
+            cell.contentConfiguration = configuration
+            
+            cell.accessoryType = .disclosureIndicator
+        }
+        dataSource.prefetchHandler = { (saveState, indexPath, completionHandler) in
+            guard saveState.game != nil else {
+                completionHandler(nil, nil)
+                return nil
+            }
+            
+            let imageOperation = LoadImageURLOperation(url: saveState.imageFileURL)
+            imageOperation.resultHandler = { (image, error) in
+                completionHandler(image, error)
+            }
+                        
+            if self.isAppearing
+            {
+                imageOperation.start()
+                imageOperation.waitUntilFinished()
+                return nil
+            }
+            
+            return imageOperation
+        }
+        dataSource.prefetchCompletionHandler = { (cell, image, indexPath, error) in
+            guard let image = image, var config = cell.contentConfiguration as? UIListContentConfiguration else { return }
+            config.image = image
+            cell.contentConfiguration = config
+        }
+        
+        return dataSource
+    }
+    
+    func makeSaveStatesFetchedResultsController() -> NSFetchedResultsController<SaveState>
+    {
+        let fetchRequest = SaveState.fetchRequest()
+        fetchRequest.returnsObjectsAsFaults = false
+        fetchRequest.sortDescriptors = [NSSortDescriptor(keyPath: \SaveState.game?.name, ascending: true), NSSortDescriptor(keyPath: \SaveState.modifiedDate, ascending: false)]
+        
+        let predicate = NSPredicate(format: "%K != %@", #keyPath(SaveState.type), SaveStateType.auto.rawValue as NSNumber)
+        
+        switch self.filter
+        {
+        case .recent:
+            let oneMonthAgo = Calendar.current.date(byAdding: .month, value: -1, to: Date()) ?? Date().addingTimeInterval(-1 * 60 * 60 * 24 * 30)
+            let recentPredicate = NSPredicate(format: "%K > %@", #keyPath(SaveState.modifiedDate), oneMonthAgo as NSDate)
+            
+            fetchRequest.predicate = NSCompoundPredicate(andPredicateWithSubpredicates: [predicate, recentPredicate])
+            
+        case .all:
+            fetchRequest.predicate = predicate
+            
+        case .sinceLastBeta:
+            let dateComponents = DateComponents(year: 2023, month: 7, day: 18, hour: 0, minute: 0, second: 0)
+            let lastBetaDate = Calendar.current.date(from: dateComponents) ?? Date().addingTimeInterval(-1 * 60 * 60 * 24 * 45)
+            
+            let sinceLastBetaPredicate = NSPredicate(format: "%K > %@", #keyPath(SaveState.modifiedDate), lastBetaDate as NSDate)
+            fetchRequest.predicate = NSCompoundPredicate(andPredicateWithSubpredicates: [predicate, sinceLastBetaPredicate])
+        }
+        
+        let fetchedResultsController = NSFetchedResultsController(fetchRequest: fetchRequest, managedObjectContext: self.managedObjectContext, sectionNameKeyPath: #keyPath(SaveState.game.name), cacheName: nil)
+        return fetchedResultsController
+    }
+    
+    func updateDataSource()
+    {
+        let fetchedResultsController = self.makeSaveStatesFetchedResultsController()
+        self.saveStatesDataSource.fetchedResultsController = fetchedResultsController
+    }
+    
+    func makeFilterButton() -> UIBarButtonItem
+    {
+        let recentAction = UIAction(title: NSLocalizedString("Past Month", comment: ""), image: UIImage(systemName: "calendar")) { [weak self] _ in
+            self?.filter = .recent
+        }
+        let allAction = UIAction(title: NSLocalizedString("All Time", comment: ""), image: UIImage(systemName: "clock")) { [weak self] _ in
+            self?.filter = .all
+        }
+        
+        var options: UIMenu.Options = []
+        if #available(iOS 15, *)
+        {
+            options = .singleSelection
+            
+            recentAction.state = self.filter == .recent ? .on : .off
+            allAction.state = self.filter == .all ? .on : .off
+        }
+        
+        let filterMenu = UIMenu(options: options, children: [recentAction, allAction])
+        
+        let filterButton = UIBarButtonItem(title: NSLocalizedString("Filter", comment: ""), image: UIImage(systemName: "calendar.badge.clock"), menu: filterMenu)
+        return filterButton
+    }
+}
+
+private extension ReviewSaveStatesViewController
+{
+    func pickGame(for saveState: SaveState)
+    {
+        let gamePickerViewController = GamePickerViewController()
+        gamePickerViewController.gameHandler = { game in
+            guard let game else { return }
+            
+            let previousGame = saveState.game
+            if previousGame != nil
+            {
+                // Move files to new location.
+                
+                let destinationDirectory = DatabaseManager.saveStatesDirectoryURL(for: game)
+                
+                for fileURL in [saveState.fileURL, saveState.imageFileURL]
+                {
+                    guard FileManager.default.fileExists(atPath: fileURL.path) else { continue }
+                    
+                    let destinationURL = destinationDirectory.appendingPathComponent(fileURL.lastPathComponent)
+                    
+                    do
+                    {
+                        try FileManager.default.copyItem(at: fileURL, to: destinationURL, shouldReplace: true) // Copy, don't move, in case app quits before user confirms.
+                    }
+                    catch
+                    {
+                        Logger.database.error("Failed to copy SaveState “\(saveState.localizedName, privacy: .public)” from \(fileURL, privacy: .public) to \(destinationURL, privacy: .public). \(error.localizedDescription, privacy: .public)")
+                    }
+                }
+            }
+            
+            let tempGame = self.managedObjectContext.object(with: game.objectID) as! Game
+            saveState.game = tempGame
+            
+            Logger.database.notice("Re-associated SaveState “\(saveState.localizedName, privacy: .public)” with game “\(tempGame.name, privacy: .public)”. Previously: \(previousGame?.name ?? "nil", privacy: .public)")
+        }
+        
+        self.navigationController?.pushViewController(gamePickerViewController, animated: true)
+    }
+    
+    @objc func finish()
+    {
+        self.navigationItem.rightBarButtonItem?.isIndicatingActivity = true
+        
+        self.managedObjectContext.perform {
+            do
+            {
+                let saveStates: [SaveState]?
+                
+                switch self.filter
+                {
+                case .recent, .all:
+                    // Only upload metadata for changed SaveStates.
+                    saveStates = self.managedObjectContext.updatedObjects.compactMap { $0 as? SaveState }
+                    
+                case .sinceLastBeta:
+                    // Upload metadata for _all_ SaveStates.
+                    saveStates = self.saveStatesDataSource.fetchedResultsController.fetchedObjects
+                }
+                
+                try self.managedObjectContext.save()
+                
+                if let saveStates = saveStates, let coordinator = SyncManager.shared.coordinator
+                {
+                    let records = try coordinator.recordController.fetchRecords(for: saveStates)
+                    if let context = records.first?.recordedObject?.managedObjectContext
+                    {
+                        try context.performAndWait {
+                            for record in records
+                            {
+                                record.perform { managedRecord in
+                                    managedRecord.flags.insert(.isGameRelationshipVerified)
+                                    managedRecord.setNeedsMetadataUpdate()
+                                    
+                                    let saveState = record.recordedObject
+                                    Logger.database.notice("Flagged SaveState “\(saveState?.localizedName ?? record.recordID.identifier, privacy: .public)” for metadata update.")
+                                }
+                            }
+                            
+                            try context.save()
+                        }
+                    }
+                }
+                
+                DispatchQueue.main.async {
+                    self.completionHandler?()
+                }
+            }
+            catch
+            {
+                DispatchQueue.main.async {
+                    self.navigationItem.rightBarButtonItem?.isIndicatingActivity = false
+                    
+                    let alertController = UIAlertController(title: NSLocalizedString("Unable to Save Changes", comment: ""), error: error)
+                    (self._parentNavigationController ?? self).present(alertController, animated: true)
+                }
+            }
+        }
+    }
+}
+
+extension ReviewSaveStatesViewController
+{
+    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)
+    {
+        let saveState = self.dataSource.item(at: indexPath)
+        self.pickGame(for: saveState)
+    }
+    
+    override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String?
+    {
+        if section == 0
+        {
+            return nil
+        }
+        else
+        {
+            let section = section - 1
+            
+            guard let gameName = self.saveStatesDataSource.fetchedResultsController.sections?[section].name else { return NSLocalizedString("Unknown Game", comment: "") }
+            return gameName
+        }
+    }
+    
+    override func tableView(_ tableView: UITableView, titleForFooterInSection section: Int) -> String?
+    {
+        guard section == 0 else { return nil }
+        
+        return NSLocalizedString("These save states have been modified recently and may be associated with the wrong game.\n\nPlease change any incorrectly associated save states to the correct game by tapping them.", comment: "")
+    }
+}

Delta/Deep Linking/CopyDeepLinkActivity.swift

@@ -15,6 +15,8 @@ extension UIActivity.ActivityType
 
 class CopyDeepLinkActivity: UIActivity
 {
+    private var deepLink: URL?
+    
     override class var activityCategory: UIActivity.Category {
         return .action
     }
@@ -28,7 +30,7 @@ class CopyDeepLinkActivity: UIActivity
     }
     
     override var activityImage: UIImage? {
-        return UIImage(named: "Link")
+        return UIImage(symbolNameIfAvailable: "link") ?? UIImage(named: "Link")
     }
     
     override func canPerform(withActivityItems activityItems: [Any]) -> Bool
@@ -47,7 +49,19 @@ class CopyDeepLinkActivity: UIActivity
     {
         guard let game = activityItems.first(where: { $0 is Game }) as? Game else { return }
         
-        let deepLink = URL(action: .launchGame(identifier: game.identifier))
+        self.deepLink = URL(action: .launchGame(identifier: game.identifier))
+    }
+    
+    override func perform()
+    {
+        if let deepLink = self.deepLink
+        {
             UIPasteboard.general.url = deepLink
+            self.activityDidFinish(true)
+        }
+        else
+        {
+            self.activityDidFinish(false)
+        }
     }
 }

Delta/Deep Linking/DeepLinkController.swift

@@ -23,9 +23,17 @@ extension UIViewController
 struct DeepLinkController
 {
     private var window: UIWindow? {
+        if #available(iOS 13, *)
+        {
+            guard let delegate = UIApplication.shared.connectedScenes.lazy.compactMap({ $0.delegate as? UIWindowSceneDelegate }).first, let window = delegate.window else { return nil }
+            return window
+        }
+        else
+        {
             guard let delegate = UIApplication.shared.delegate, let window = delegate.window else { return nil }
             return window
         }
+    }
     
     private var topViewController: UIViewController? {
         guard let window = self.window else { return nil }

Delta/Emulation/GameViewController.swift

@@ -7,16 +7,29 @@
 //
 
 import UIKit
+import Photos
 
 import DeltaCore
 import GBADeltaCore
+import MelonDSDeltaCore
+import Systems
 
 import struct DSDeltaCore.DS
 
 import Roxas
+import AltKit
 
 private var kvoContext = 0
 
+private extension DeltaCore.ControllerSkin
+{
+    func hasTouchScreen(for traits: DeltaCore.ControllerSkin.Traits) -> Bool
+    {
+        let hasTouchScreen = self.items(for: traits)?.contains(where: { $0.kind == .touchScreen }) ?? false
+        return hasTouchScreen
+    }
+}
+
 private extension GameViewController
 {
     struct PausedSaveState: SaveStateProtocol
@@ -49,6 +62,7 @@ private extension GameViewController
             }
             
             // Only intercept controller skin inputs.
+            // 只拦截控制器皮肤输入。
             guard controllerInput.type == .controller(.controllerSkin) else { return nil }
             
             let actionInput = ActionInput(stringValue: controllerInput.stringValue)
@@ -79,6 +93,7 @@ private extension GameViewController
 class GameViewController: DeltaCore.GameViewController
 {
     /// Assumed to be Delta.Game instance
+    /// /// 假设为 Delta.Game 实例
     override var game: GameProtocol? {
         willSet {
             self.emulatorCore?.removeObserver(self, forKeyPath: #keyPath(EmulatorCore.state), context: &kvoContext)
@@ -99,8 +114,8 @@ class GameViewController: DeltaCore.GameViewController
                 self.shouldResetSustainedInputs = true
             }
             
-            self.updateControllerSkin()
             self.updateControllers()
+            self.updateAudio()
             
             self.presentedGyroAlert = false
         }
@@ -158,6 +173,8 @@ class GameViewController: DeltaCore.GameViewController
     private var isGyroActive = false
     private var presentedGyroAlert = false
     
+    private var presentedJITAlert = false
+    
     override var shouldAutorotate: Bool {
         return !self.isGyroActive
     }
@@ -166,6 +183,14 @@ class GameViewController: DeltaCore.GameViewController
         return .all
     }
     
+    override var prefersStatusBarHidden: Bool {
+        return !ExperimentalFeatures.shared.showStatusBar.isEnabled
+    }
+    
+    override var preferredStatusBarStyle: UIStatusBarStyle {
+        return .lightContent
+    }
+    
     required init()
     {
         super.init()
@@ -189,13 +214,18 @@ class GameViewController: DeltaCore.GameViewController
         
         NotificationCenter.default.addObserver(self, selector: #selector(GameViewController.didEnterBackground(with:)), name: UIApplication.didEnterBackgroundNotification, object: UIApplication.shared)
         
-        NotificationCenter.default.addObserver(self, selector: #selector(GameViewController.settingsDidChange(with:)), name: .settingsDidChange, object: nil)
+        NotificationCenter.default.addObserver(self, selector: #selector(GameViewController.settingsDidChange(with:)), name: Settings.didChangeNotification, object: nil)
         NotificationCenter.default.addObserver(self, selector: #selector(GameViewController.deepLinkControllerLaunchGame(with:)), name: .deepLinkControllerLaunchGame, object: nil)
         
         NotificationCenter.default.addObserver(self, selector: #selector(GameViewController.didActivateGyro(with:)), name: GBA.didActivateGyroNotification, object: nil)
         NotificationCenter.default.addObserver(self, selector: #selector(GameViewController.didDeactivateGyro(with:)), name: GBA.didDeactivateGyroNotification, object: nil)
         
         NotificationCenter.default.addObserver(self, selector: #selector(GameViewController.emulationDidQuit(with:)), name: EmulatorCore.emulationDidQuitNotification, object: nil)
+        
+        NotificationCenter.default.addObserver(self, selector: #selector(GameViewController.didEnableJIT(with:)), name: ServerManager.didEnableJITNotification, object: nil)
+        
+        NotificationCenter.default.addObserver(self, selector: #selector(GameViewController.sceneWillConnect(with:)), name: UIScene.willConnectNotification, object: nil)
+        NotificationCenter.default.addObserver(self, selector: #selector(GameViewController.sceneDidDisconnect(with:)), name: UIScene.didDisconnectNotification, object: nil)
     }
     
     deinit
@@ -307,7 +337,6 @@ extension GameViewController
         self.sustainButtonsContentView.topAnchor.constraint(equalTo: self.gameView.topAnchor).isActive = true
         self.sustainButtonsContentView.bottomAnchor.constraint(equalTo: self.gameView.bottomAnchor).isActive = true
         
-        self.updateControllerSkin()
         self.updateControllers()
     }
     
@@ -322,12 +351,18 @@ extension GameViewController
             
             UserDefaults.standard.desmumeDeprecatedAlertCount += 1
         }
+        else if self.emulatorCore?.deltaCore == MelonDS.core, ProcessInfo.processInfo.isJITAvailable
+        {
+            self.showJITEnabledAlert()
+        }
     }
     
     override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator)
     {
         super.viewWillTransition(to: size, with: coordinator)
         
+        guard UIApplication.shared.applicationState != .background else { return }
+                
         coordinator.animate(alongsideTransition: { (context) in
             self.updateControllerSkin()
         }, completion: nil)        
@@ -383,6 +418,9 @@ extension GameViewController
             pauseViewController.fastForwardItem?.action = { [unowned self] item in
                 self.performFastForwardAction(activate: item.isSelected)
             }
+            pauseViewController.screenshotItem?.action = { [unowned self] item in
+                self.performScreenshotAction()
+            }
             
             pauseViewController.sustainButtonsItem?.isSelected = gameController.sustainedInputs.count > 0
             pauseViewController.sustainButtonsItem?.action = { [unowned self, unowned pauseViewController] item in
@@ -402,19 +440,20 @@ extension GameViewController
                 self.pausingGameController = gameController
             }
             
+            if self.emulatorCore?.deltaCore.supportedRates.upperBound == 1
+            {
+                pauseViewController.fastForwardItem = nil
+            }
+            
             switch self.game?.type
             {
-            case .n64? where !UIDevice.current.hasA9ProcessorOrBetter:
-                // A8 processors and earlier aren't powerful enough to run N64 games faster than 1x speed.
-                pauseViewController.fastForwardItem = nil
-            
             case .ds? where self.emulatorCore?.deltaCore == DS.core:
                 // Cheats are not supported by DeSmuME core.
                 pauseViewController.cheatCodesItem = nil
                 
-            case .ds? where !UIDevice.current.hasA9ProcessorOrBetter:
-                // A8 processors and earlier aren't powerful enough to run DS games faster than 1x speed.
-                pauseViewController.fastForwardItem = nil
+            case .genesis?:
+                // GPGX core does not support cheats yet.
+                pauseViewController.cheatCodesItem = nil
 
             default: break
             }
@@ -465,6 +504,13 @@ extension GameViewController
                 }
                 
                 self._isLoadingSaveState = false
+                
+                if self.emulatorCore?.deltaCore == MelonDS.core, ProcessInfo.processInfo.isJITAvailable
+                {
+                    self.transitionCoordinator?.animate(alongsideTransition: nil, completion: { (context) in
+                        self.showJITEnabledAlert()
+                    })
+                }
             }
             
         case "unwindToGames":
@@ -544,15 +590,26 @@ private extension GameViewController
         }
         
         // If Settings.localControllerPlayerIndex is non-nil, and there isn't a connected controller with same playerIndex, show controller view.
-        if let index = Settings.localControllerPlayerIndex, !ExternalGameControllerManager.shared.connectedControllers.contains { $0.playerIndex == index }
+        if let index = Settings.localControllerPlayerIndex, !ExternalGameControllerManager.shared.connectedControllers.contains(where: { $0.playerIndex == index })
         {
             self.controllerView.playerIndex = index
             self.controllerView.isHidden = false
         }
         else
         {
-            self.controllerView.playerIndex = nil
+            if let game = self.game,
+               let traits = self.controllerView.controllerSkinTraits,
+               let controllerSkin = DeltaCore.ControllerSkin.standardControllerSkin(for: game.type),
+               controllerSkin.hasTouchScreen(for: traits)
+            {
+                self.controllerView.isHidden = false
+                self.controllerView.playerIndex = 0
+            }
+            else
+            {
                 self.controllerView.isHidden = true
+                self.controllerView.playerIndex = nil
+            }
 
             Settings.localControllerPlayerIndex = nil
         }
@@ -608,6 +665,8 @@ private extension GameViewController
         
         self.controllerView.isButtonHapticFeedbackEnabled = Settings.isButtonHapticFeedbackEnabled
         self.controllerView.isThumbstickHapticFeedbackEnabled = Settings.isThumbstickHapticFeedbackEnabled
+        
+        self.updateControllerSkin()
     }
     
     func updateControllerSkin()
@@ -616,11 +675,72 @@ private extension GameViewController
         
         let traits = DeltaCore.ControllerSkin.Traits.defaults(for: window)
         
+        if Settings.localControllerPlayerIndex != nil
+        {
             let controllerSkin = Settings.preferredControllerSkin(for: game, traits: traits)
             self.controllerView.controllerSkin = controllerSkin
+        }
+        else if let controllerSkin = DeltaCore.ControllerSkin.standardControllerSkin(for: game.type), controllerSkin.hasTouchScreen(for: traits)
+        {
+            var touchControllerSkin = TouchControllerSkin(controllerSkin: controllerSkin)
+            
+            if UIApplication.shared.isExternalDisplayConnected
+            {
+                // Only show touch screen if external display is connected.
+                touchControllerSkin.screenPredicate = { $0.isTouchScreen }
+            }
+                        
+            if self.view.bounds.width > self.view.bounds.height
+            {
+                touchControllerSkin.screenLayoutAxis = .horizontal
+            }
+            else
+            {
+                touchControllerSkin.screenLayoutAxis = .vertical
+            }
+            
+            self.controllerView.controllerSkin = touchControllerSkin
+        }
+        
+        self.updateExternalDisplay()
         
         self.view.setNeedsLayout()
     }
+    
+    func updateGameViews()
+    {
+        if UIApplication.shared.isExternalDisplayConnected
+        {
+            // AirPlaying, hide all (non-touch) screens.
+            
+            if let traits = self.controllerView.controllerSkinTraits, let screens = self.controllerView.controllerSkin?.screens(for: traits)
+            {
+                for (screen, gameView) in zip(screens, self.gameViews)
+                {
+                    gameView.isEnabled = screen.isTouchScreen
+                    gameView.isHidden = !screen.isTouchScreen
+                }
+            }
+            else
+            {
+                // Either self.controllerView.controllerSkin is `nil`, or it doesn't support these traits.
+                // Most likely this system only has 1 screen, so just hide self.gameView.
+                
+                self.gameView.isEnabled = false
+                self.gameView.isHidden = true
+            }
+        }
+        else
+        {
+            // Not AirPlaying, show all screens.
+            
+            for gameView in self.gameViews
+            {
+                gameView.isEnabled = true
+                gameView.isHidden = false
+            }
+        }
+    }
 }
 
 //MARK: - Game Saves -
@@ -637,23 +757,30 @@ private extension GameViewController
                 let game = context.object(with: game.objectID) as! Game
                 
                 let hash = try RSTHasher.sha1HashOfFile(at: game.gameSaveURL)
-                let previousHash = game.gameSaveURL.extendedAttribute(name: "com.rileytestut.delta.sha1Hash")
+                let previousHash = game.gameSave?.sha1
                 
                 guard hash != previousHash else { return }
                 
                 if let gameSave = game.gameSave
                 {
                     gameSave.modifiedDate = Date()
+                    gameSave.sha1 = hash
                 }
                 else
                 {
                     let gameSave = GameSave(context: context)
                     gameSave.identifier = game.identifier
+                    gameSave.sha1 = hash
+                    
                     game.gameSave = gameSave
                 }
                 
                 try context.save()
-                try game.gameSaveURL.setExtendedAttribute(name: "com.rileytestut.delta.sha1Hash", value: hash)
+                
+                if ExperimentalFeatures.shared.toastNotifications.gameSaveEnabled
+                {
+                    self.presentExperimentalToastView(NSLocalizedString("Game Data Saved", comment: ""))
+                }
             }
             catch CocoaError.fileNoSuchFile
             {
@@ -772,6 +899,12 @@ extension GameViewController: SaveStatesViewControllerDelegate
         saveState.modifiedDate = Date()
         saveState.coreIdentifier = self.emulatorCore?.deltaCore.identifier
         
+        if ExperimentalFeatures.shared.toastNotifications.stateSaveEnabled,
+           saveState.type != .auto
+        {
+            self.presentExperimentalToastView(NSLocalizedString("Saved Save State", comment: ""))
+        }
+        
         if isRunning
         {
             self.resumeEmulation()
@@ -819,6 +952,11 @@ extension GameViewController: SaveStatesViewControllerDelegate
             {
                 try self.emulatorCore?.load(saveState)
             }
+            
+            if ExperimentalFeatures.shared.toastNotifications.stateLoadEnabled
+            {
+                self.presentExperimentalToastView(NSLocalizedString("Loaded Save State", comment: ""))
+            }
         }
         catch EmulatorCore.SaveStateError.doesNotExist
         {
@@ -876,6 +1014,16 @@ extension GameViewController: CheatsViewControllerDelegate
     }
 }
 
+//MARK: - Audio -
+/// Audio
+private extension GameViewController
+{
+    func updateAudio()
+    {
+        self.emulatorCore?.audioManager.respectsSilentMode = Settings.respectSilentMode
+    }
+}
+
 //MARK: - Sustain Buttons -
 private extension GameViewController
 {
@@ -896,6 +1044,8 @@ private extension GameViewController
         UIView.animate(withDuration: 0.4) {
             self.sustainButtonsBlurView.effect = blurEffect
             self.sustainButtonsBackgroundView.alpha = 1.0
+        } completion: { _ in
+            self.controllerView.becomeFirstResponder()
         }
     }
     
@@ -990,22 +1140,201 @@ extension GameViewController
         guard let emulatorCore = self.emulatorCore else { return }
         
         if activate
+        {
+            if ExperimentalFeatures.shared.variableFastForward.isEnabled,
+               let preferredSpeed = ExperimentalFeatures.shared.variableFastForward[emulatorCore.game.type],
+               (preferredSpeed.rawValue <= emulatorCore.deltaCore.supportedRates.upperBound || ExperimentalFeatures.shared.variableFastForward.allowUnrestrictedSpeeds)
+            {
+                emulatorCore.rate = preferredSpeed.rawValue
+            }
+            else
             {
                 emulatorCore.rate = emulatorCore.deltaCore.supportedRates.upperBound
             }
+            
+            if ExperimentalFeatures.shared.toastNotifications.fastForwardEnabled
+            {
+                self.presentExperimentalToastView(NSLocalizedString("Fast Forward Enabled", comment: ""))
+            }
+        }
         else
         {
             emulatorCore.rate = emulatorCore.deltaCore.supportedRates.lowerBound
+            
+            if ExperimentalFeatures.shared.toastNotifications.fastForwardEnabled
+            {
+                self.presentExperimentalToastView(NSLocalizedString("Fast Forward Disabled", comment: ""))
             }
         }
     }
     
+    func performScreenshotAction()
+    {
+        guard let snapshot = self.emulatorCore?.videoManager.snapshot() else { return }
+
+        let imageScale = ExperimentalFeatures.shared.gameScreenshots.size?.rawValue ?? 1.0
+        let imageSize = CGSize(width: snapshot.size.width * imageScale, height: snapshot.size.height * imageScale)
+        
+        let screenshotData: Data
+        if imageScale == 1, let data = snapshot.pngData()
+        {
+            // No need to redraw image because it's already the correct size.
+            screenshotData = data
+        }
+        else
+        {
+            let format = UIGraphicsImageRendererFormat()
+            format.scale = 1
+            
+            let renderer = UIGraphicsImageRenderer(size: imageSize, format: format)
+            screenshotData = renderer.pngData { (context) in
+                context.cgContext.interpolationQuality = .none
+                snapshot.draw(in: CGRect(origin: .zero, size: imageSize))
+            }
+        }
+        
+        if ExperimentalFeatures.shared.gameScreenshots.saveToPhotos
+        {
+            PHPhotoLibrary.runIfAuthorized
+            {
+                PHPhotoLibrary.saveImageData(screenshotData)
+            }
+        }
+        
+        if ExperimentalFeatures.shared.gameScreenshots.saveToFiles
+        {
+            let screenshotsDirectory = FileManager.default.documentsDirectory.appendingPathComponent("Screenshots")
+            
+            do
+            {
+                try FileManager.default.createDirectory(at: screenshotsDirectory, withIntermediateDirectories: true, attributes: nil)
+            }
+            catch
+            {
+                print(error)
+            }
+            
+            let date = Date()
+            let dateFormatter = DateFormatter()
+            dateFormatter.dateFormat = "yyyy-MM-dd_HH-mm-ss"
+            
+            let fileName: URL
+            if let game = self.game as? Game
+            {
+                let filename = game.name + "_" + dateFormatter.string(from: date) + ".png"
+                fileName = screenshotsDirectory.appendingPathComponent(filename)
+            }
+            else
+            {
+                fileName = screenshotsDirectory.appendingPathComponent(dateFormatter.string(from: date) + ".png")
+            }
+            
+            do
+            {
+                try screenshotData.write(to: fileName)
+            }
+            catch
+            {
+                print(error)
+            }
+        }
+        
+        self.pauseViewController?.screenshotItem?.isSelected = false
+    }
+}
+
+private extension GameViewController
+{
+    func connectExternalDisplay(for scene: ExternalDisplayScene)
+    {
+        // We need to receive gameViewController(_:didUpdateGameViews) callback.
+        scene.gameViewController.delegate = self
+        
+        self.updateControllerSkin()
+        
+        // Implicitly called from updateControllerSkin()
+        // self.updateExternalDisplay()
+    }
+    
+    func updateExternalDisplay()
+    {
+        guard let scene = UIApplication.shared.externalDisplayScene else { return }
+        
+        if scene.game?.fileURL != self.game?.fileURL
+        {
+            scene.game = self.game
+        }
+        
+        var controllerSkin: ControllerSkinProtocol?
+        
+        if let game = self.game, let traits = scene.gameViewController.controllerView.controllerSkinTraits
+        {
+            if ExperimentalFeatures.shared.airPlaySkins.isEnabled,
+               let preferredControllerSkin = ExperimentalFeatures.shared.airPlaySkins.preferredAirPlayControllerSkin(for: game.type), preferredControllerSkin.supports(traits)
+            {
+                // Use preferredControllerSkin directly.
+                controllerSkin = preferredControllerSkin
+            }
+            else if let standardSkin = DeltaCore.ControllerSkin.standardControllerSkin(for: game.type), standardSkin.supports(traits)
+            {
+                if standardSkin.hasTouchScreen(for: traits)
+                {
+                    // Only use TouchControllerSkin for standard controller skins with touch screens.
+                    
+                    var touchControllerSkin = DeltaCore.TouchControllerSkin(controllerSkin: standardSkin)
+                    touchControllerSkin.screenLayoutAxis = Settings.features.dsAirPlay.layoutAxis
+
+                    if Settings.features.dsAirPlay.topScreenOnly
+                    {
+                        touchControllerSkin.screenPredicate = { !$0.isTouchScreen }
+                    }
+
+                    controllerSkin = touchControllerSkin
+                }
+                else
+                {
+                    controllerSkin = standardSkin
+                }
+            }
+        }
+        
+        scene.gameViewController.controllerView.controllerSkin = controllerSkin
+        
+        // Implicitly called when assigning controllerSkin.
+        // self.updateExternalDisplayGameViews()
+    }
+    
+    func updateExternalDisplayGameViews()
+    {
+        guard let scene = UIApplication.shared.externalDisplayScene, let emulatorCore = self.emulatorCore else { return }
+        
+        for gameView in scene.gameViewController.gameViews
+        {
+            emulatorCore.add(gameView)
+        }
+    }
+    
+    func disconnectExternalDisplay(for scene: ExternalDisplayScene)
+    {
+        scene.gameViewController.delegate = nil
+        
+        for gameView in scene.gameViewController.gameViews
+        {
+            self.emulatorCore?.remove(gameView)
+        }
+        
+        self.updateControllerSkin() // Reset TouchControllerSkin + GameViews
+    }
+}
+
 //MARK: - GameViewControllerDelegate -
 /// GameViewControllerDelegate
 extension GameViewController: GameViewControllerDelegate
 {
     func gameViewController(_ gameViewController: DeltaCore.GameViewController, handleMenuInputFrom gameController: GameController)
     {
+        guard gameViewController == self else { return }
+        
         if let pausingGameController = self.pausingGameController
         {
             guard pausingGameController == gameController else { return }
@@ -1023,12 +1352,16 @@ extension GameViewController: GameViewControllerDelegate
         else if self.presentedViewController == nil
         {
             self.pauseEmulation()
+            self.controllerView.resignFirstResponder()
+            
             self.performSegue(withIdentifier: "pause", sender: gameController)
         }
     }
     
     func gameViewControllerShouldResumeEmulation(_ gameViewController: DeltaCore.GameViewController) -> Bool
     {
+        guard gameViewController == self else { return false }
+        
         var result = false
         
         rst_dispatch_sync_on_main_thread {
@@ -1037,6 +1370,20 @@ extension GameViewController: GameViewControllerDelegate
         
         return result
     }
+    
+    func gameViewController(_ gameViewController: DeltaCore.GameViewController, didUpdateGameViews gameViews: [GameView])
+    {
+        // gameViewController could be `self` or ExternalDisplayScene.gameViewController.
+        
+        if gameViewController == self
+        {
+            self.updateGameViews()
+        }
+        else
+        {
+            self.updateExternalDisplayGameViews()
+        }
+    }
 }
 
 private extension GameViewController
@@ -1047,6 +1394,48 @@ private extension GameViewController
         toastView.presentationEdge = .top
         toastView.show(in: self.view, duration: duration)
     }
+    
+    func showJITEnabledAlert()
+    {
+        guard !self.presentedJITAlert, self.presentedViewController == nil, self.game != nil else { return }
+        self.presentedJITAlert = true
+        
+        func presentToastView()
+        {
+            let detailText: String?
+            let duration: TimeInterval
+            
+            if UserDefaults.standard.jitEnabledAlertCount < 3
+            {
+                detailText = NSLocalizedString("You can now Fast Forward DS games up to 3x speed.", comment: "")
+                duration = 5.0
+            }
+            else
+            {
+                detailText = nil
+                duration = 2.0
+            }
+            
+            let toastView = RSTToastView(text: NSLocalizedString("JIT Compilation Enabled", comment: ""), detailText: detailText)
+            toastView.edgeOffset.vertical = 8
+            self.show(toastView, duration: duration)
+            
+            UserDefaults.standard.jitEnabledAlertCount += 1
+        }
+        
+        DispatchQueue.main.async {
+            if let transitionCoordinator = self.transitionCoordinator
+            {
+                transitionCoordinator.animate(alongsideTransition: nil) { (context) in
+                    presentToastView()
+                }
+            }
+            else
+            {
+                presentToastView()
+            }
+        }
+    }
 }
 
 //MARK: - Notifications -
@@ -1089,9 +1478,24 @@ private extension GameViewController
                 self.updateControllerSkin()
             }
             
-        case .translucentControllerSkinOpacity: self.controllerView.translucentControllerSkinOpacity = Settings.translucentControllerSkinOpacity
+        case .translucentControllerSkinOpacity:
+            self.controllerView.translucentControllerSkinOpacity = Settings.translucentControllerSkinOpacity
             
-        case .syncingService: break
+        case .respectSilentMode:
+            self.updateAudio()
+                
+        case .syncingService, .isAltJITEnabled: break
+            
+        case Settings.features.dsAirPlay.$topScreenOnly.settingsKey: fallthrough
+        case Settings.features.dsAirPlay.$layoutAxis.settingsKey:
+            self.updateExternalDisplay()
+        
+        case ExperimentalFeatures.shared.airPlaySkins.settingsKey: fallthrough
+        case _ where settingsName.rawValue.hasPrefix(ExperimentalFeatures.shared.airPlaySkins.settingsKey.rawValue):
+            // Update whenever any of the AirPlay skins have changed.
+            self.updateExternalDisplay()
+            
+        default: break
         }
     }
     
@@ -1169,6 +1573,60 @@ private extension GameViewController
         self.isGyroActive = false
     }
     
+    @objc func didEnableJIT(with notification: Notification)
+    {
+        DispatchQueue.main.async {
+            self.showJITEnabledAlert()
+        }
+        
+        DispatchQueue.global(qos: .utility).async {
+            guard let emulatorCore = self.emulatorCore, let emulatorBridge = emulatorCore.deltaCore.emulatorBridge as? MelonDSEmulatorBridge, !emulatorBridge.isJITEnabled
+            else { return }
+            
+            guard emulatorCore.state != .stopped else {
+                // Emulator core is not running, which means we can set
+                // isJITEnabled to true without resetting the core.
+                emulatorBridge.isJITEnabled = true
+                return
+            }
+            
+            let isVideoEnabled = emulatorCore.videoManager.isEnabled
+            emulatorCore.videoManager.isEnabled = false
+            
+            let isRunning = (emulatorCore.state == .running)
+            if isRunning
+            {
+                self.pauseEmulation()
+            }
+            
+            let temporaryFileURL = FileManager.default.uniqueTemporaryURL()
+            
+            let saveState = emulatorCore.saveSaveState(to: temporaryFileURL)
+            emulatorCore.stop()
+            
+            emulatorBridge.isJITEnabled = true
+            
+            emulatorCore.start()
+            emulatorCore.pause()
+            
+            do
+            {
+                try emulatorCore.load(saveState)
+            }
+            catch
+            {
+                print("Failed to load save state after enabling JIT.", error)
+            }
+            
+            if isRunning
+            {
+                self.resumeEmulation()
+            }
+            
+            emulatorCore.videoManager.isEnabled = isVideoEnabled
+        }
+    }
+    
     @objc func emulationDidQuit(with notification: Notification)
     {
         DispatchQueue.main.async {
@@ -1188,9 +1646,23 @@ private extension GameViewController
             }
         }
     }
+    
+    @objc func sceneWillConnect(with notification: Notification)
+    {
+        guard let scene = notification.object as? ExternalDisplayScene else { return }
+        self.connectExternalDisplay(for: scene)
+    }
+    
+    @objc func sceneDidDisconnect(with notification: Notification)
+    {
+        guard let scene = notification.object as? ExternalDisplayScene else { return }
+        self.disconnectExternalDisplay(for: scene)
+    }
 }
 
 private extension UserDefaults
 {
     @NSManaged var desmumeDeprecatedAlertCount: Int
+    
+    @NSManaged var jitEnabledAlertCount: Int
 }

Delta/Emulation/PreviewGameViewController.swift

@@ -15,18 +15,23 @@ private var kvoContext = 0
 class PreviewGameViewController: DeltaCore.GameViewController
 {
     // If non-nil, will override the default preview action items returned in previewActionItems()
+    // 如果非nil，将覆盖previewActionItems()中返回的默认预览操作项
     var overridePreviewActionItems: [UIPreviewActionItem]?
     
     // Save state to be loaded upon preview
+    // 保存预览时加载的状态
     var previewSaveState: SaveStateProtocol?
     
     // Initial image to be shown while loading
+    // 加载时显示的初始图像
     var previewImage: UIImage? {
         didSet {
             self.updatePreviewImage()
         }
     }
     
+    var isLivePreview: Bool = true
+    
     private var emulatorCoreQueue = DispatchQueue(label: "com.rileytestut.Delta.PreviewGameViewController.emulatorCoreQueue", qos: .userInitiated)
     private var copiedSaveFiles = [(originalURL: URL, copyURL: URL)]()
     
@@ -58,10 +63,26 @@ class PreviewGameViewController: DeltaCore.GameViewController
         return previewActionItems
     }
     
+    public required init()
+    {
+        super.init()
+        
+        self.delegate = self
+    }
+    
+    public required init?(coder aDecoder: NSCoder)
+    {
+        super.init(coder: aDecoder)
+        
+        self.delegate = self
+    }
+    
     deinit
     {
         // Explicitly stop emulatorCore _before_ we remove ourselves as observer
         // so we can wait until stopped before restoring save files (again).
+        // 在我们删除自己作为观察者之前显式停止 emulatorCore
+                // 所以我们可以等到停止后再恢复保存文件（再次）。
         self.emulatorCore?.stop()
         
         self.emulatorCore?.removeObserver(self, forKeyPath: #keyPath(EmulatorCore.state), context: &kvoContext)
@@ -77,8 +98,10 @@ extension PreviewGameViewController
         super.viewDidLoad()
         
         self.controllerView.isHidden = true
+        self.controllerView.controllerSkin = nil // Skip loading controller skin from disk, which may be slow.跳过从磁盘加载控制器皮肤，这可能会很慢。
         
         // Temporarily prevent emulatorCore from updating gameView to prevent flicker of black, or other visual glitches
+        // 暂时阻止 emulatorCore 更新 gameView 以防止黑色闪烁或其他视觉故障
         self.emulatorCore?.remove(self.gameView)
     }
     
@@ -94,7 +117,7 @@ extension PreviewGameViewController
         super.viewDidAppear(animated)
         
         self.emulatorCoreQueue.async {
-            self.emulatorCore?.start()
+            self.startEmulation()
         }
     }
     
@@ -103,6 +126,7 @@ extension PreviewGameViewController
         super.viewWillDisappear(animated)
         
         // Pause in viewWillDisappear and not viewDidDisappear like DeltaCore.GameViewController so the audio cuts off earlier if being dismissed
+        // 在 vi​​ewWillDisappear 中暂停，而不是像 DeltaCore.GameViewController 那样在 viewDidDisappear 中暂停，因此如果被关闭，音频会更早切断
         self.emulatorCore?.pause()
     }
     
@@ -111,10 +135,13 @@ extension PreviewGameViewController
         super.viewDidDisappear(animated)
         
         // Already stopped = we've already restored save files and removed directory.
+        // 已经停止 = 我们已经恢复了保存文件并删除了目录。
         if self.emulatorCore?.state != .stopped
         {
             // Pre-emptively restore save files in case something goes wrong while stopping emulation.
             // This also ensures if the core is never stopped (for some reason), saves are still restored.
+            // 抢先恢复保存文件，以防在停止仿真时出现问题。
+                        // 这也确保如果核心从未停止（由于某种原因），保存仍然可以恢复。
             self.restoreSaveFiles(removeCopyDirectory: false)
         }
     }
@@ -124,6 +151,8 @@ extension PreviewGameViewController
         super.viewDidLayoutSubviews()
         
         // Need to update in viewDidLayoutSubviews() to ensure bounds of gameView are not CGRect.zero
+        
+        // 需要在 viewDidLayoutSubviews() 中进行更新以确保 gameView 的边界不是 CGRect.zero
         self.updatePreviewImage()
     }
 
@@ -131,6 +160,7 @@ extension PreviewGameViewController
     {
         super.didReceiveMemoryWarning()
         // Dispose of any resources that can be recreated.
+        // 处理掉所有可以重新创建的资源。
     }
     
     override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?)
@@ -148,6 +178,7 @@ extension PreviewGameViewController
         case .running where previousState == .stopped:
             self.emulatorCoreQueue.async {
                 // Pause to prevent it from starting before visible (in case user peeked slowly)
+                // 暂停以防止它在可见之前启动（以防用户缓慢地偷看）
                 self.emulatorCore?.pause()
                 self.preparePreview()
             }
@@ -155,6 +186,8 @@ extension PreviewGameViewController
         case .stopped:
             // Emulation has stopped, so we can safely restore save files,
             // and also remove the directory they were copied to.
+            // 模拟已停止，因此我们可以安全地恢复保存文件，
+                        // 并删除它们复制到的目录。
             self.restoreSaveFiles(removeCopyDirectory: true)
             
         default: break
@@ -207,6 +240,7 @@ private extension PreviewGameViewController
         self.emulatorCore?.updateCheats()
         
         // Re-enable emulatorCore to update gameView again
+        // 重新启用emulatorCore以再次更新gameView
         self.emulatorCore?.add(self.gameView)
         
         self.emulatorCore?.resume()
@@ -264,3 +298,11 @@ private extension PreviewGameViewController
         }
     }
 }
+
+extension PreviewGameViewController: GameViewControllerDelegate
+{
+    func gameViewControllerShouldResumeEmulation(_ gameViewController: DeltaCore.GameViewController) -> Bool
+    {
+        return self.isLivePreview
+    }
+}

Delta/Experimental Features/ExperimentalFeatures.swift

@@ -0,0 +1,53 @@
+//
+//  ExperimentalFeatures.swift
+//  Delta
+//
+//  Created by Riley Testut on 4/6/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import DeltaFeatures
+
+struct ExperimentalFeatures: FeatureContainer
+{
+    static let shared = ExperimentalFeatures()
+    
+    @Feature(name: "AirPlay Skins",
+             description: "Customize the appearance of games when AirPlaying to your TV.",
+             options: AirPlaySkinsOptions())
+    var airPlaySkins
+    
+    @Feature(name: "Variable Fast Forward",
+             description: "Change the preferred Fast Foward speed per-system. You can also change it by long-pressing the Fast Forward button from the Pause Menu.",
+             options: VariableFastForwardOptions())
+    var variableFastForward
+    
+    @Feature(name: "Show Status Bar",
+             description: "Enable to show the Status Bar during gameplay.")
+    var showStatusBar
+    
+    @Feature(name: "Game Screenshots",
+             description: "When enabled, a Screenshot button will appear in the Pause Menu, allowing you to save a screenshot of your game. You can choose to save the screenshot to Photos or Files.",
+             options: GameScreenshotsOptions())
+    var gameScreenshots
+    
+    @Feature(name: "Toast Notifications",
+             description: "Show toast notifications as a confirmation for various actions, such as saving your game or loading a save state.",
+             options: ToastNotificationOptions())
+    var toastNotifications
+    
+    @Feature(name: "Review Save States",
+             description: "Review recent Save States to make sure they are associated with the correct game.",
+             options: ReviewSaveStatesOptions())
+    var reviewSaveStates
+    
+    @Feature(name: "Alternate App Icon",
+             description: "Change the app icon.",
+             options: AlternateAppIconOptions())
+    var alternateAppIcons
+    
+    private init()
+    {
+        self.prepareFeatures()
+    }
+}

Delta/Experimental Features/Features/AirPlaySkins.swift

@@ -0,0 +1,167 @@
+//
+//  AirPlaySkins.swift
+//  Delta
+//
+//  Created by Riley Testut on 4/20/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import SwiftUI
+
+import DeltaFeatures
+import DeltaCore
+
+extension Feature where Options == AirPlaySkinsOptions
+{
+    func preferredAirPlayControllerSkin(for gameType: GameType) -> ControllerSkin?
+    {
+        guard let identifier = self[gameType] else { return nil }
+        
+        let predicate = NSPredicate(format: "%K == %@", #keyPath(ControllerSkin.identifier), identifier)
+        let controllerSkin = ControllerSkin.instancesWithPredicate(predicate, inManagedObjectContext: DatabaseManager.shared.viewContext, type: ControllerSkin.self).first
+        return controllerSkin
+    }
+}
+
+struct AirPlaySkinsOptions
+{
+    @Option(name: "Manage Skins", detailView: { _ in SkinManager() })
+    private var skinManager: String = "" // Hack until I figure out how to support Void properties...
+    
+    @Option(name: LocalizedStringKey(System.nes.localizedName), description: "The controller skin used when AirPlaying NES games.", detailView: { SkinPicker(gameType: .nes, controllerSkinID: $0) })
+    var nes: String?
+    
+    @Option(name: LocalizedStringKey(System.snes.localizedName), description: "The controller skin used when AirPlaying SNES games.", detailView: { SkinPicker(gameType: .snes, controllerSkinID: $0) })
+    var snes: String?
+    
+    @Option(name: LocalizedStringKey(System.genesis.localizedName), description: "The controller skin used when AirPlaying Genesis games.", detailView: { SkinPicker(gameType: .genesis, controllerSkinID: $0) })
+    var genesis: String?
+    
+    @Option(name: LocalizedStringKey(System.n64.localizedName), description: "The controller skin used when AirPlaying N64 games.", detailView: { SkinPicker(gameType: .n64, controllerSkinID: $0) })
+    var n64: String?
+    
+    @Option(name: LocalizedStringKey(System.gbc.localizedName), description: "The controller skin used when AirPlaying GBC games.", detailView: { SkinPicker(gameType: .gbc, controllerSkinID: $0) })
+    var gbc: String?
+    
+    @Option(name: LocalizedStringKey(System.gba.localizedName), description: "The controller skin used when AirPlaying GBA games.", detailView: { SkinPicker(gameType: .gba, controllerSkinID: $0) })
+    var gba: String?
+    
+    @Option(name: LocalizedStringKey(System.ds.localizedName), description: "The controller skin used when AirPlaying DS games.", detailView: { SkinPicker(gameType: .ds, controllerSkinID: $0) })
+    var ds: String?
+    
+    subscript(gameType: GameType) -> String? {
+        guard let system = System(gameType: gameType) else { return nil }
+        switch system
+        {
+        case .nes: return self.nes
+        case .snes: return self.snes
+        case .genesis: return self.genesis
+        case .n64: return self.n64
+        case .gbc: return self.gbc
+        case .gba: return self.gba
+        case .ds: return self.ds
+        }
+    }
+}
+
+fileprivate extension AirPlaySkinsOptions
+{
+    struct SkinPicker: View
+    {
+        let gameType: GameType
+        
+        @Binding
+        var controllerSkinID: String?
+        
+        @FetchRequest
+        private var controllerSkins: FetchedResults<ControllerSkin>
+        
+        @Environment(\.featureOption)
+        private var option
+        
+        var body: some View {
+            Picker(option.name ?? "", selection: $controllerSkinID) {
+                ForEach(controllerSkins, id: \.identifier) { controllerSkin in
+                    Text(controllerSkin.name)
+                        .tag(Optional<String>(controllerSkin.identifier)) // Must be Optional<String> in order for selection to work.
+                        // .tag(controllerSkin.identifier)
+                }
+                
+                Text("None")
+                    .tag(String?.none)
+            }
+            .pickerStyle(.menu)
+            .displayInline()
+        }
+        
+        init(gameType: GameType, controllerSkinID: Binding<String?>)
+        {
+            self.gameType = gameType
+            self._controllerSkinID = controllerSkinID
+            
+            let configuration = ControllerSkinConfigurations.tvStandardLandscape
+            
+            let predicate = NSPredicate(format: "%K == %@ AND (%K & %d) != 0 AND %K == NO",
+                                        #keyPath(ControllerSkin.gameType), self.gameType.rawValue,
+                                        #keyPath(ControllerSkin.supportedConfigurations), configuration.rawValue,
+                                        #keyPath(ControllerSkin.isStandard))
+            
+            self._controllerSkins = FetchRequest(entity: ControllerSkin.entity(), sortDescriptors: [NSSortDescriptor(keyPath: \ControllerSkin.name, ascending: true)], predicate: predicate)
+        }
+    }
+    
+    struct SkinManager: View
+    {
+        @FetchRequest(entity: ControllerSkin.entity(),
+                      sortDescriptors: [NSSortDescriptor(keyPath: \ControllerSkin.name, ascending: true)],
+                      predicate: {
+            let configuration = ControllerSkinConfigurations.tvStandardLandscape
+            return NSPredicate(format: "(%K & %d) != 0 AND %K == NO",
+                               #keyPath(ControllerSkin.supportedConfigurations), configuration.rawValue,
+                               #keyPath(ControllerSkin.isStandard))
+        }())
+        private var controllerSkins: FetchedResults<ControllerSkin>
+        
+        var body: some View {
+            if controllerSkins.isEmpty
+            {
+                Text("No AirPlay Skins")
+                    .foregroundColor(.gray)
+            }
+            else
+            {
+                List {
+                    ForEach(controllerSkins, id: \.identifier) { controllerSkin in
+                        HStack {
+                            Text(controllerSkin.name)
+                            
+                            Spacer()
+                            
+                            if let system = System(gameType: controllerSkin.gameType)
+                            {
+                                Text(system.localizedShortName)
+                                    .foregroundColor(.gray)
+                            }
+                        }
+                    }
+                    .onDelete(perform: deleteAirPlaySkins)
+                }
+            }
+        }
+        
+        private func deleteAirPlaySkins(at indexes: IndexSet)
+        {
+            let objectIDs = indexes.map { controllerSkins[$0].objectID }
+            
+            DatabaseManager.shared.performBackgroundTask { context in
+                let controllerSkins = objectIDs.compactMap { context.object(with: $0) as? ControllerSkin }
+                for controllerSkin in controllerSkins
+                {
+                    context.delete(controllerSkin)
+                }
+                
+                context.saveWithErrorLogging()
+            }
+        }
+    }
+}

Delta/Experimental Features/Features/AlternateAppIcons.swift

@@ -0,0 +1,124 @@
+//
+//  AlternateAppIcons.swift
+//  Delta
+//
+//  Created by Chris Rittenhouse on 5/2/23.
+//  Copyright © 2023 LitRitt. All rights reserved.
+//
+
+import SwiftUI
+
+import DeltaFeatures
+
+enum AppIcon: String, CaseIterable, CustomStringConvertible, Identifiable
+{
+    case normal = "Default"
+    case gba4ios = "GBA4iOS"
+    case inverted = "Inverted"
+    case pixelated = "Pixelated"
+    case skin = "Controller Skin"
+    
+    var description: String {
+        return self.rawValue
+    }
+    
+    var id: String {
+        return self.rawValue
+    }
+    
+    var author: String {
+        switch self
+        {
+        case .normal: return "Caroline Moore"
+        case .gba4ios: return "Paul Thorsen"
+        case .inverted, .skin, .pixelated: return "LitRitt"
+        }
+    }
+    
+    var assetName: String {
+        switch self
+        {
+        case .normal: return "AppIcon"
+        case .gba4ios: return "IconGBA4iOS"
+        case .inverted: return "IconInverted"
+        case .pixelated: return "IconPixelated"
+        case .skin: return "IconSkin"
+        }
+    }
+}
+
+extension AppIcon: Equatable
+{
+    static func == (lhs: AppIcon, rhs: AppIcon) -> Bool
+    {
+        return lhs.description == rhs.description
+    }
+}
+
+extension AppIcon: LocalizedOptionValue
+{
+    var localizedDescription: Text {
+        Text(self.description)
+    }
+}
+
+struct AlternateAppIconOptions
+{
+    @Option(name: "Alternate App Icon",
+            description: "Choose from alternate app icons created by the community.",
+            detailView: { value in
+        List {
+            ForEach(AppIcon.allCases) { icon in
+                HStack {
+                    if icon == value.wrappedValue
+                    {
+                        Text("✓")
+                    }
+                    icon.localizedDescription
+                    Text("- by \(icon.author)")
+                        .font(.system(size: 15))
+                        .foregroundColor(.gray)
+                    Spacer()
+                    Image(uiImage: Bundle.appIcon(for: icon) ?? UIImage())
+                        .cornerRadius(13)
+                }
+                .contentShape(Rectangle())
+                .onTapGesture {
+                    value.wrappedValue = icon
+                }
+            }
+        }
+        .onChange(of: value.wrappedValue) { _ in
+            updateAppIcon()
+        }
+        .displayInline()
+    })
+    var icon: AppIcon = .normal
+}
+
+extension AlternateAppIconOptions
+{
+    static func updateAppIcon()
+    {
+        // Get current icon
+        let currentIcon = UIApplication.shared.alternateIconName
+        
+        // Apply chosen icon if feature is enabled
+        if ExperimentalFeatures.shared.alternateAppIcons.isEnabled
+        {
+            let icon = ExperimentalFeatures.shared.alternateAppIcons.icon
+            
+            // Only apply new icon if it's not already the current icon
+            switch icon
+            {
+            case .normal: if currentIcon != nil { UIApplication.shared.setAlternateIconName(nil) } // Default app icon
+            default: if currentIcon != icon.assetName { UIApplication.shared.setAlternateIconName(icon.assetName) } // Alternate app icon
+            }
+        }
+        else
+        {
+            // Remove alternate icons if feature is disabled
+            if currentIcon != nil { UIApplication.shared.setAlternateIconName(nil) }
+        }
+    }
+}

Delta/Experimental Features/Features/GameScreenshots.swift

@@ -0,0 +1,54 @@
+//
+//  GameScreenshots.swift
+//  Delta
+//
+//  Created by Chris Rittenhouse on 4/24/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import SwiftUI
+
+import DeltaFeatures
+
+enum ScreenshotSize: Double, CaseIterable, CustomStringConvertible
+{
+    case x5 = 5
+    case x4 = 4
+    case x3 = 3
+    case x2 = 2
+    
+    var description: String {
+        if #available(iOS 15, *)
+        {
+            let formattedText = self.rawValue.formatted(.number.decimalSeparator(strategy: .automatic))
+            return "\(formattedText)x Size"
+        }
+        else
+        {
+            return "\(self.rawValue)x Size"
+        }
+    }
+}
+
+extension ScreenshotSize: LocalizedOptionValue
+{
+    var localizedDescription: Text {
+        Text(self.description)
+    }
+    
+    static var localizedNilDescription: Text {
+        Text("Original Size")
+    }
+}
+
+struct GameScreenshotsOptions
+{
+    @Option(name: "Save to Files", description: "Save the screenshot to the app's directory in Files.")
+    var saveToFiles: Bool = true
+
+    @Option(name: "Save to Photos", description: "Save the screenshot to the Photo Library.")
+    var saveToPhotos: Bool = false
+
+    @Option(name: "Image Size", description: "Choose the size of screenshots. This only increases the export size, it does not increase the quality.", values: ScreenshotSize.allCases)
+    var size: ScreenshotSize?
+}

Delta/Experimental Features/Features/ReviewSaveStatesOptions.swift

@@ -0,0 +1,30 @@
+//
+//  LinkSaveStatesOptions.swift
+//  Delta
+//
+//  Created by Riley Testut on 8/7/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import SwiftUI
+
+import DeltaFeatures
+
+struct ReviewSaveStatesView: UIViewControllerRepresentable
+{
+    func makeUIViewController(context: Context) -> ReviewSaveStatesViewController
+    {
+        let viewController = ReviewSaveStatesViewController()
+        return viewController
+    }
+    
+    func updateUIViewController(_ uiViewController: ReviewSaveStatesViewController, context: Context)
+    {
+    }
+}
+
+struct ReviewSaveStatesOptions
+{
+    @Option(name: "View Save States", detailView: { _ in ReviewSaveStatesView() })
+    private var reviewSaveStates: String = "" // Hack until I figure out how to support Void properties...
+}

Delta/Experimental Features/Features/ToastNotificationOptions.swift

@@ -0,0 +1,38 @@
+//
+//  ToastNotificationOptions.swift
+//  Delta
+//
+//  Created by Chris Rittenhouse on 4/25/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import SwiftUI
+
+import DeltaFeatures
+
+struct ToastNotificationOptions
+{
+    @Option(name: "Duration", description: "Change how long toasts should be shown.", detailView: { duration in
+        HStack {
+            Text("Duration: \(duration.wrappedValue, specifier: "%.1f")s")
+            Slider(value: duration, in: 1...5, step: 0.5).displayInline()
+        }
+    })
+    var duration: Double = 1.5
+    
+    @Option(name: "Game Data Saved",
+            description: "Show toasts when performing an in game save.")
+    var gameSaveEnabled: Bool = true
+    
+    @Option(name: "Saved Save State",
+            description: "Show toasts when saving a save state.")
+    var stateSaveEnabled: Bool = true
+    
+    @Option(name: "Loaded Save State",
+            description: "Show toasts when loading a save state.")
+    var stateLoadEnabled: Bool = true
+    
+    @Option(name: "Fast Forward Toggled",
+            description: "Show toasts when toggling fast forward.")
+    var fastForwardEnabled: Bool = true
+}

Delta/Experimental Features/Features/VariableFastForward.swift

@@ -0,0 +1,129 @@
+//
+//  VariableFastForward.swift
+//  Delta
+//
+//  Created by Riley Testut on 4/5/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import SwiftUI
+
+import DeltaCore
+import DeltaFeatures
+
+struct FastForwardSpeed: RawRepresentable
+{
+    let rawValue: Double
+    
+    init(rawValue: Double)
+    {
+        self.rawValue = rawValue
+    }
+    
+    static func speeds(in range: ClosedRange<Double>) -> [FastForwardSpeed]
+    {
+        var range = range
+        
+        if ExperimentalFeatures.shared.variableFastForward.allowUnrestrictedSpeeds
+        {
+            range = 1.0...8.0
+        }
+        
+        // .dropFirst() to remove 1x speed.
+        var speeds = stride(from: range.lowerBound, to: range.upperBound, by: 1.0).dropFirst().map { FastForwardSpeed(rawValue: $0) }
+        
+        // Handles both integer and non-integer maximum speeds, because range.upperBound is not included in `speeds`.
+        speeds.append(.init(rawValue: range.upperBound))
+        
+        return speeds
+    }
+}
+
+extension FastForwardSpeed: CustomStringConvertible, LocalizedOptionValue
+{
+    var description: String {
+        if #available(iOS 15, *)
+        {
+            let formattedText = self.rawValue.formatted(.number.decimalSeparator(strategy: .automatic))
+            return "\(formattedText)x"
+        }
+        else
+        {
+            return "\(self.rawValue)x"
+        }
+    }
+    
+    var localizedDescription: Text {
+        Text(self.description)
+    }
+    
+    static var localizedNilDescription: Text {
+        Text("Maximum")
+    }
+}
+
+struct VariableFastForwardOptions
+{
+    // Alternatively, this feature could be implemented with single hidden dictionary @Option mapping preferred speeds to systems,
+    // because we support changing these values by long-pressing the Fast Forward button in the pause menu.
+    // However, we want to also show these options in Delta's settings, which requires us to explicitly define them one-by-one.
+    //
+    // @Option // No name = hidden
+    // var preferredSpeedsBySystem: [String: Double] = [:]
+    
+    @Option(name: "Nintendo", description: "Preferred NES fast forward speed.", values: FastForwardSpeed.speeds(in: System.nes.deltaCore.supportedRates))
+    var nes: FastForwardSpeed?
+
+    @Option(name: "Super Nintendo", description: "Preferred SNES fast forward speed.", values: FastForwardSpeed.speeds(in: System.snes.deltaCore.supportedRates))
+    var snes: FastForwardSpeed?
+    
+    @Option(name: "Sega Genesis", description: "Preferred Genesis fast forward speed.", values: FastForwardSpeed.speeds(in: System.genesis.deltaCore.supportedRates))
+    var genesis: FastForwardSpeed?
+
+    @Option(name: "Nintendo 64", description: "Preferred N64 fast forward speed.", values: FastForwardSpeed.speeds(in: System.n64.deltaCore.supportedRates))
+    var n64: FastForwardSpeed?
+
+    @Option(name: "Game Boy Color", description: "Preferred GBC fast forward speed.", values: FastForwardSpeed.speeds(in: System.gbc.deltaCore.supportedRates))
+    var gbc: FastForwardSpeed?
+
+    @Option(name: "Game Boy Advance", description: "Preferred GBA fast forward speed.", values: FastForwardSpeed.speeds(in: System.gba.deltaCore.supportedRates))
+    var gba: FastForwardSpeed?
+
+    @Option(name: "Nintendo DS", description: "Preferred DS fast forward speed.", values: FastForwardSpeed.speeds(in: System.ds.deltaCore.supportedRates))
+    var ds: FastForwardSpeed?
+    
+    @Option(name: "Allow Unrestricted Speeds", description: "Allow choosing speeds that exceed the maximum supported speed of a system.\n\nThis can be used to test the performance of new iOS devices.")
+    var allowUnrestrictedSpeeds: Bool = false
+}
+
+extension Feature where Options == VariableFastForwardOptions
+{
+    subscript(gameType: GameType) -> FastForwardSpeed? {
+        get {
+            guard let system = System(gameType: gameType) else { return nil }
+            switch system
+            {
+            case .nes: return self.nes
+            case .snes: return self.snes
+            case .genesis: return self.genesis
+            case .n64: return self.n64
+            case .gbc: return self.gbc
+            case .gba: return self.gba
+            case .ds: return self.ds
+            }
+        }
+        set {
+            guard let system = System(gameType: gameType) else { return }
+            switch system
+            {
+            case .nes: self.nes = newValue
+            case .snes: self.snes = newValue
+            case .genesis: self.genesis = newValue
+            case .n64: self.n64 = newValue
+            case .gbc: self.gbc = newValue
+            case .gba: self.gba = newValue
+            case .ds: self.ds = newValue
+            }
+        }
+    }
+}

Delta/Extensions/Bundle+AppIconImage.swift

@@ -0,0 +1,34 @@
+//
+//  Bundle+AppIconImage.swift
+//  Delta
+//
+//  Created by Chris Rittenhouse on 7/20/23.
+//  Copyright © 2023 LitRitt. All rights reserved.
+//
+
+import UIKit
+
+extension Bundle
+{
+    static func appIcon(for icon: AppIcon = .normal) -> UIImage? {
+        guard let appIcons = Bundle.main.infoDictionary?["CFBundleIcons"] as? [String: Any] else { return nil }
+        
+        switch icon
+        {
+        case .normal:
+            guard let primaryAppIcon = appIcons["CFBundlePrimaryIcon"] as? [String: Any],
+                  let appIconFiles = primaryAppIcon["CFBundleIconFiles"] as? [String],
+                  let appIcon = appIconFiles.first else { return nil }
+            
+            return UIImage(named:appIcon)
+            
+        default:
+            guard let alternateAppIcons = appIcons["CFBundleAlternateIcons"] as? [String: Any],
+                  let alternateAppIcon = alternateAppIcons[icon.assetName] as? [String: Any],
+                  let appIconFiles = alternateAppIcon["CFBundleIconFiles"] as? [String],
+                  let appIcon = appIconFiles.first else { return nil }
+            
+            return UIImage(named:appIcon)
+        }
+    }
+}

Delta/Extensions/CharacterSet+Filename.swift

@@ -0,0 +1,22 @@
+//
+//  CharacterSet+Filename.swift
+//  Delta
+//
+//  Created by Riley Testut on 4/28/22.
+//  Copyright © 2022 Riley Testut. All rights reserved.
+//
+
+import Foundation
+
+extension CharacterSet
+{
+    // Different than .urlPathAllowed
+    // Copied from https://stackoverflow.com/a/39443252
+    static var urlFilenameAllowed: CharacterSet {
+        var illegalCharacters = CharacterSet(charactersIn: ":/")
+        illegalCharacters.formUnion(.newlines)
+        illegalCharacters.formUnion(.illegalCharacters)
+        illegalCharacters.formUnion(.controlCharacters)
+        return illegalCharacters.inverted
+    }
+}

Delta/Extensions/ControllerSkin+Configuring.swift

@@ -6,6 +6,8 @@
 //  Copyright © 2016 Riley Testut. All rights reserved.
 //
 
+import UIKit
+
 import DeltaCore
 
 extension ControllerSkin
@@ -32,20 +34,19 @@ extension ControllerSkin
         
         var configurations = ControllerSkinConfigurations()
         
-        let device: DeltaCore.ControllerSkin.Device = (UIDevice.current.userInterfaceIdiom == .pad) ? .ipad : .iphone
-        
-        let traitCollections: [(displayType: DeltaCore.ControllerSkin.DisplayType, orientation: DeltaCore.ControllerSkin.Orientation)] =
-            [(.standard, .portrait), (.standard, .landscape), (.edgeToEdge, .portrait), (.edgeToEdge, .landscape), (.splitView, .portrait), (.splitView, .landscape)]
-        
-        for collection in traitCollections
-        {
-            let traits = DeltaCore.ControllerSkin.Traits(device: device, displayType: collection.displayType, orientation: collection.orientation)
-            if skin.supports(traits)
-            {
-                let configuration = ControllerSkinConfigurations(traits: traits)
-                configurations.formUnion(configuration)
+        let allTraitCombinations = DeltaCore.ControllerSkin.Device.allCases.flatMap { device in
+            DeltaCore.ControllerSkin.DisplayType.allCases.flatMap { displayType in
+                DeltaCore.ControllerSkin.Orientation.allCases.map { orientation in
+                    DeltaCore.ControllerSkin.Traits(device: device, displayType: displayType, orientation: orientation)
                 }
             }
+        }
+        
+        for traits in allTraitCombinations
+        {
+            guard let configuration = ControllerSkinConfigurations(traits: traits), skin.supports(traits) else { continue }
+            configurations.formUnion(configuration)
+        }
         
         self.supportedConfigurations = configurations
     }

Delta/Extensions/GameViewController+ExperimentalToasts.swift

@@ -0,0 +1,25 @@
+//
+//  GameViewController+ExperimentalToasts.swift
+//  Delta
+//
+//  Created by Chris Rittenhouse on 4/26/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import Roxas
+
+extension GameViewController
+{
+    func presentExperimentalToastView(_ text: String)
+    {
+        guard ExperimentalFeatures.shared.toastNotifications.isEnabled else { return }
+        
+        DispatchQueue.main.async {
+            let toastView = RSTToastView(text: text, detailText: nil)
+            toastView.edgeOffset.vertical = 8
+            toastView.textLabel.textAlignment = .center
+            toastView.presentationEdge = .top
+            toastView.show(in: self.view, duration: ExperimentalFeatures.shared.toastNotifications.duration)
+        }
+    }
+}

Delta/Extensions/HarmonyMetadataKey+Keys.swift

@@ -12,6 +12,7 @@ extension HarmonyMetadataKey
 {
     static let gameID = HarmonyMetadataKey("gameID")
     static let gameName = HarmonyMetadataKey("gameName")
+    static let verifiedGameID = HarmonyMetadataKey("verifiedGameID")
     
     // Backwards compatibility
     static let coreID = HarmonyMetadataKey("coreID")

Delta/Extensions/Input+Display.swift

@@ -124,6 +124,8 @@ extension Input
             case .leftTrigger: return NSLocalizedString("L2", comment: "")
             case .rightShoulder: return NSLocalizedString("R1", comment: "")
             case .rightTrigger: return NSLocalizedString("R2", comment: "")
+            case .start: return NSLocalizedString("Start", comment: "")
+            case .select: return NSLocalizedString("Select", comment: "")
             }
             
         case .controller(.keyboard):

Delta/Extensions/NSManagedObjectContext+Conveniences.swift

@@ -23,4 +23,29 @@ extension NSManagedObjectContext
             print("Error saving NSManagedObjectContext: ", error, error.userInfo)
         }
     }
+    
+    // MARK: - Perform -
+    
+    func performAndWait<T>(_ block: @escaping () -> T) -> T
+    {
+        var result: T! = nil
+        
+        self.performAndWait {
+            result = block()
+        }
+        
+        return result
+    }
+    
+    func performAndWait<T>(_ block: @escaping () throws -> T) throws -> T
+    {
+        var result: Result<T, Error>! = nil
+        
+        self.performAndWait {
+            result = Result { try block() }
+        }
+        
+        let value = try result.get()
+        return value
+    }
 }

Delta/Extensions/OSLog+Delta.swift

@@ -0,0 +1,38 @@
+//
+//  OSLog+Delta.swift
+//  Delta
+//
+//  Created by Riley Testut on 8/10/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import OSLog
+
+extension OSLog.Category
+{
+    static let database = "Database"
+}
+
+extension Logger
+{
+    static let deltaSubsystem = "com.rileytestut.Delta"
+    
+    static let database = Logger(subsystem: deltaSubsystem, category: OSLog.Category.database)
+}
+
+@available(iOS 15, *)
+extension OSLogEntryLog.Level
+{
+    var localizedName: String {
+        switch self
+        {
+        case .undefined: return NSLocalizedString("Undefined", comment: "")
+        case .debug: return NSLocalizedString("Debug", comment: "")
+        case .info: return NSLocalizedString("Info", comment: "")
+        case .notice: return NSLocalizedString("Notice", comment: "")
+        case .error: return NSLocalizedString("Error", comment: "")
+        case .fault: return NSLocalizedString("Fault", comment: "")
+        @unknown default: return NSLocalizedString("Unknown", comment: "")
+        }
+    }
+}

Delta/Extensions/PHPhotoLibrary+Authorization.swift

@@ -0,0 +1,46 @@
+//
+//  PHPhotoLibrary+Authorization.swift
+//  Delta
+//
+//  Created by Chris Rittenhouse on 4/24/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import UIKit
+import Photos
+
+extension PHPhotoLibrary
+{
+    static func runIfAuthorized(code: @escaping () -> Void)
+    {
+        PHPhotoLibrary.requestAuthorization(for: .addOnly, handler: { success in
+            switch success
+            {
+            case .authorized, .limited:
+                code()
+                
+            case .denied, .restricted, .notDetermined: break
+            @unknown default: break
+            }
+        })
+    }
+    
+    static func saveImageData(_ data: Data)
+    {
+        // Save the image to the Photos app
+        PHPhotoLibrary.shared().performChanges({
+            PHAssetCreationRequest.forAsset().addResource(with: .photo, data: data, options: nil)
+        }, completionHandler: { success, error in
+            if success
+            {
+                // Image saved successfully
+                print("Image saved to Photos app.")
+            }
+            else
+            {
+                // Error saving image
+                print("Error saving image: \(error?.localizedDescription ?? "Unknown error")")
+            }
+        })
+    }
+}

Delta/Extensions/ProcessInfo+JIT.swift

@@ -0,0 +1,41 @@
+//
+//  ProcessInfo+JIT.swift
+//  Delta
+//
+//  Created by Riley Testut on 9/14/21.
+//  Copyright © 2021 Riley Testut. All rights reserved.
+//
+
+import UIKit
+
+private let CS_OPS_STATUS: UInt32 = 0 /* OK */
+private let CS_DEBUGGED: UInt32   = 0x10000000  /* Process is or has been attached to debugger. */
+
+@_silgen_name("csops")
+func csops(_ pid: pid_t, _ ops: UInt32, _ useraddr: UnsafeMutableRawPointer?, _ usersize: Int) -> Int
+
+extension ProcessInfo
+{
+    static var isJITDisabled = false
+    
+    var isDebugging: Bool {
+        var flags: UInt32 = 0
+        let result = csops(getpid(), CS_OPS_STATUS, &flags, MemoryLayout<UInt32>.size)
+        
+        let isDebugging = result == 0 && (flags & CS_DEBUGGED == CS_DEBUGGED)
+        return isDebugging
+    }
+    
+    var isJITAvailable: Bool {
+        guard UIDevice.current.supportsJIT && !ProcessInfo.isJITDisabled else { return false }
+        
+        let ios14_4 = OperatingSystemVersion(majorVersion: 14, minorVersion: 4, patchVersion: 0)
+        if #available(iOS 14.2, *), !ProcessInfo.processInfo.isOperatingSystemAtLeast(ios14_4)
+        {
+            // JIT is always available on supported devices running iOS 14.2 - 14.3.
+            return true
+        }
+        
+        return self.isDebugging
+    }
+}

Delta/Extensions/ServerManager+Delta.swift

@@ -0,0 +1,104 @@
+//
+//  ServerManager+Delta.swift
+//  Delta
+//
+//  Created by Riley Testut on 9/15/21.
+//  Copyright © 2021 Riley Testut. All rights reserved.
+//
+
+import AltKit
+
+extension ServerManager
+{
+    static let didEnableJITNotification = Notification.Name("didEnableJITNotification")
+}
+
+extension ServerManager
+{
+    func prepare()
+    {
+        NotificationCenter.default.addObserver(self, selector: #selector(ServerManager.didChangeJITMode(_:)), name: Settings.didChangeNotification, object: nil)
+        
+        #if DEBUG
+        if ProcessInfo.processInfo.isDebugging
+        {
+            // Debugger is attached at app launch, so we assume
+            // we're connected to Xcode for debugging purposes.
+            // In that case, we manually treat JIT as unavailable
+            // until AltServer is discovered to simulate real-world use.
+            ProcessInfo.isJITDisabled = true
+        }
+        #endif
+        
+        self.start()
+    }
+}
+
+private extension ServerManager
+{
+    func start()
+    {
+        guard Settings.isAltJITEnabled && !ProcessInfo.processInfo.isJITAvailable else { return }
+        
+        self.startDiscovering()
+        self.autoconnect()
+    }
+    
+    func autoconnect()
+    {
+        self.autoconnect { result in
+            switch result
+            {
+            case .failure(let error):
+                print("Could not auto-connect to server.", error)
+                self.autoconnect()
+                
+            case .success(let connection):
+                func finish(result: Result<Void, Error>)
+                {
+                    switch result
+                    {
+                    case .failure(ALTServerError.unknownRequest), .failure(ALTServerError.deviceNotFound):
+                        // Try connecting to a different server.
+                        self.autoconnect()
+                        
+                    case .failure(let error):
+                        print("Could not enable JIT compilation.", error)
+                        
+                    case .success:
+                        print("Successfully enabled JIT compilation!")
+                        
+                        NotificationCenter.default.post(name: ServerManager.didEnableJITNotification, object: nil)
+                        self.stopDiscovering()
+                    }
+                    
+                    connection.disconnect()
+                }
+                
+                if ProcessInfo.isJITDisabled
+                {
+                    ProcessInfo.isJITDisabled = false
+                    finish(result: .success(()))
+                }
+                else
+                {
+                    connection.enableUnsignedCodeExecution(completion: finish)
+                }
+            }
+        }
+    }
+    
+    @objc func didChangeJITMode(_ notification: Notification)
+    {
+        guard let name = notification.userInfo?[Settings.NotificationUserInfoKey.name] as? Settings.Name, name == Settings.Name.isAltJITEnabled else { return }
+        
+        if Settings.isAltJITEnabled
+        {
+            self.start()
+        }
+        else
+        {
+            self.stopDiscovering()
+        }
+    }
+}

Delta/Extensions/UIColor+Delta.swift

@@ -10,6 +10,6 @@ import UIKit
 
 extension UIColor
 {
-    static let deltaPurple = UIColor(named: "Purple")!
-    static let deltaDarkGray = UIColor(named: "DarkGray")!
+    static let deltaPurple = UIColor.purple
+    static let deltaDarkGray = #colorLiteral(red: 0.07139974087, green: 0.08217515796, blue: 0.1083263531, alpha: 1)
 }

Delta/Extensions/UIDevice+Processor.swift

@@ -8,12 +8,28 @@
 
 import UIKit
 import ARKit
+import Metal
 
 extension UIDevice
 {
+    private static var mtlDevice: MTLDevice? = MTLCreateSystemDefaultDevice()
+    
     var hasA9ProcessorOrBetter: Bool {
         // ARKit is only supported by devices with an A9 processor or better, according to the documentation.
         // https://developer.apple.com/documentation/arkit/arconfiguration/2923553-issupported
         return ARConfiguration.isSupported
     }
+    
+    var hasA11ProcessorOrBetter: Bool {
+        guard let mtlDevice = UIDevice.mtlDevice else { return false }
+        return mtlDevice.supportsFeatureSet(.iOS_GPUFamily4_v1) // iOS GPU Family 4 = A11 GPU
+    }
+    
+    var supportsJIT: Bool {
+        guard #available(iOS 14.0, *) else { return false }
+        
+        // JIT is supported on devices with an A12 processor or better running iOS 14.0 or later.
+        // ARKit 3 is only supported by devices with an A12 processor or better, according to the documentation.
+        return ARBodyTrackingConfiguration.isSupported
+    }
 }

Delta/Extensions/URL+ExtendedAttributes.swift

@@ -1,45 +0,0 @@
-//
-//  URL+ExtendedAttributes.swift
-//  Delta
-//
-//  Created by Riley Testut on 3/26/19.
-//  Copyright © 2019 Riley Testut. All rights reserved.
-//
-
-import Foundation
-
-extension URL
-{
-    func setExtendedAttribute(name: String, value: String) throws
-    {
-        try self.withUnsafeFileSystemRepresentation { (path) in
-            let data = value.data(using: .utf8)
-            let result = data?.withUnsafeBytes { (buffer) in
-                setxattr(path, name, buffer.baseAddress, buffer.count, 0, 0)
-            }
-            
-            if let result = result, result < 0
-            {
-                throw POSIXError(POSIXErrorCode(rawValue: errno) ?? .ENOENT)
-            }
-        }
-    }
-    
-    func extendedAttribute(name: String) -> String?
-    {
-        let value = self.withUnsafeFileSystemRepresentation { (path) -> String? in
-            let size = getxattr(path, name, nil, 0, 0, 0)
-            guard size >= 0 else { return nil }
-            
-            var data = Data(count: size)
-            let result = data.withUnsafeMutableBytes { getxattr(path, name, $0.baseAddress, $0.count, 0, 0) }
-            
-            guard result >= 0 else { return nil }
-            
-            let value = String(data: data, encoding: .utf8)!
-            return value
-        }
-        
-        return value
-    }
-}

Delta/Extensions/UserDefaults+Delta.swift

@@ -0,0 +1,14 @@
+//
+//  UserDefaults+Delta.swift
+//  Delta
+//
+//  Created by Riley Testut on 8/10/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import Foundation
+
+extension UserDefaults
+{
+    @NSManaged var shouldRepairDatabase: Bool
+}

Delta/Game Selection/GameCollectionViewController.swift

@@ -43,6 +43,8 @@ class GameCollectionViewController: UICollectionViewController
             
             // Calling reloadData sometimes will not update the cells correctly if an insertion/deletion animation is in progress
             // As a workaround, we manually iterate over and configure each cell ourselves
+            // 如果正在进行插入/删除动画，调用 reloadData 有时不会正确更新单元格
+                         // 作为解决方法，我们自己手动迭代并配置每个单元
             for cell in self.collectionView?.visibleCells ?? []
             {
                 if let indexPath = self.collectionView?.indexPath(for: cell)
@@ -66,6 +68,8 @@ class GameCollectionViewController: UICollectionViewController
     private weak var _previewTransitionViewController: PreviewGameViewController?
     private weak var _previewTransitionDestinationViewController: UIViewController?
     
+    private weak var _popoverSourceView: UIView?
+    
     private var _renameAction: UIAlertAction?
     private var _changingArtworkGame: Game?
     private var _importingSaveFileGame: Game?
@@ -93,10 +97,6 @@ extension GameCollectionViewController
         self.collectionView?.prefetchDataSource = self.dataSource
         self.collectionView?.delegate = self
         
-        let layout = self.collectionViewLayout as! GridCollectionViewLayout
-        layout.itemWidth = 90
-        layout.minimumInteritemSpacing = 12
-        
         if #available(iOS 13, *) {}
         else
         {
@@ -105,6 +105,8 @@ extension GameCollectionViewController
             let longPressGestureRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(GameCollectionViewController.handleLongPressGesture(_:)))
             self.collectionView?.addGestureRecognizer(longPressGestureRecognizer)
         }
+        
+        self.update()
     }
     
     override func viewWillDisappear(_ animated: Bool)
@@ -131,6 +133,13 @@ extension GameCollectionViewController
         super.didReceiveMemoryWarning()
         // Dispose of any resources that can be recreated.
     }
+    
+    override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?)
+    {
+        super.traitCollectionDidChange(previousTraitCollection)
+        
+        self.update()
+    }
 }
 
 //MARK: - Segues -
@@ -167,9 +176,28 @@ extension GameCollectionViewController
             
             destinationViewController.game = game
             
+            if let emulatorBridge = destinationViewController.emulatorCore?.deltaCore.emulatorBridge as? MelonDSEmulatorBridge
+            {
+                //TODO: Update this to work with multiple processes by retrieving emulatorBridge directly from emulatorCore.
+                //TODO：通过直接从 emulatorCore 检索 emulatorBridge 来更新它以与多个进程一起使用。
+                
+                if game.identifier == Game.melonDSDSiBIOSIdentifier
+                {
+                    emulatorBridge.systemType = .dsi
+                }
+                else
+                {
+                    emulatorBridge.systemType = .ds
+                }
+                
+                emulatorBridge.isJITEnabled = ProcessInfo.processInfo.isJITAvailable
+            }
+            
             if let saveState = self.activeSaveState
             {
                 // Must be synchronous or else there will be a flash of black
+                
+                // 必须同步否则会有黑闪
                 destinationViewController.emulatorCore?.start()
                 destinationViewController.emulatorCore?.pause()
                 
@@ -208,6 +236,27 @@ extension GameCollectionViewController
 //MARK: - Private Methods -
 private extension GameCollectionViewController
 {
+    func update()
+    {
+        let layout = self.collectionViewLayout as! GridCollectionViewLayout
+        
+        switch self.traitCollection.horizontalSizeClass
+        {
+        case .regular:
+            layout.itemWidth = 150
+            layout.minimumInteritemSpacing = 25 // 30 == only 3 games per line for iPad mini 6 in portrait
+            // 30 == 对于纵向 iPad mini 6，每行仅 3 场游戏
+            
+        case .unspecified, .compact:
+            layout.itemWidth = 90
+            layout.minimumInteritemSpacing = 12
+            
+        @unknown default: break
+        }
+        
+        self.collectionView.reloadData()
+    }
+    
     //MARK: - Data Source
     func prepareDataSource()
     {
@@ -266,9 +315,21 @@ private extension GameCollectionViewController
             cell.isImageViewVibrancyEnabled = true
         }
         
-        cell.imageView.image = #imageLiteral(resourceName: "BoxArt")
+        cell.imageView.image = #imageLiteral(resourceName: "zw")
+        
+        if self.traitCollection.horizontalSizeClass == .regular
+        {
+            let fontDescriptor = UIFontDescriptor.preferredFontDescriptor(withTextStyle: .subheadline).withSymbolicTraits(.traitBold)!
+            cell.textLabel.font = UIFont(descriptor: fontDescriptor, size: 0)
+        }
+        else
+        {
+            cell.textLabel.font = UIFont.preferredFont(forTextStyle: .caption1)
+        }
+        
+        let layout = self.collectionViewLayout as! GridCollectionViewLayout
+        cell.maximumImageSize = CGSize(width: layout.itemWidth, height: layout.itemWidth)
         
-        cell.maximumImageSize = CGSize(width: 90, height: 90)
         cell.textLabel.text = game.name
         cell.textLabel.textColor = UIColor.gray
         cell.tintColor = cell.textLabel.textColor
@@ -314,11 +375,13 @@ private extension GameCollectionViewController
                     }
                     
                     // Disable videoManager to prevent flash of black
+                    // 禁用videoManager以防止黑屏闪烁
                     self.activeEmulatorCore?.videoManager.isEnabled = false
                     
                     launchGame(ignoringErrors: [LaunchError.alreadyRunning])
                     
                     // The game hasn't changed, so the activeEmulatorCore is the same as before, so we need to enable videoManager it again
+                    // 游戏没有改变，所以activeEmulatorCore和之前一样，所以我们需要再次启用videoManager
                     self.activeEmulatorCore?.videoManager.isEnabled = true
                 }))
                 alertController.addAction(UIAlertAction(title: NSLocalizedString("Restart", comment: ""), style: .destructive, handler: { (action) in
@@ -358,7 +421,7 @@ private extension GameCollectionViewController
             launchGame(ignoringErrors: [])
         }
     }
-    
+    //验证启动游戏
     func validateLaunchingGame(_ game: Game, ignoringErrors ignoredErrors: [Error]) throws
     {
         let ignoredErrors = ignoredErrors.map { $0 as NSError }
@@ -394,6 +457,17 @@ private extension GameCollectionViewController
         }
         
         if game.type == .ds && Settings.preferredCore(for: .ds) == MelonDS.core
+        {
+            if game.identifier == Game.melonDSDSiBIOSIdentifier
+            {
+                guard
+                    FileManager.default.fileExists(atPath: MelonDSEmulatorBridge.shared.dsiBIOS7URL.path) &&
+                    FileManager.default.fileExists(atPath: MelonDSEmulatorBridge.shared.dsiBIOS9URL.path) &&
+                    FileManager.default.fileExists(atPath: MelonDSEmulatorBridge.shared.dsiFirmwareURL.path) &&
+                    FileManager.default.fileExists(atPath: MelonDSEmulatorBridge.shared.dsiNANDURL.path)
+                else { throw LaunchError.biosNotFound }
+            }
+            else
             {
                 guard
                     FileManager.default.fileExists(atPath: MelonDSEmulatorBridge.shared.bios7URL.path) &&
@@ -403,6 +477,7 @@ private extension GameCollectionViewController
             }
         }
     }
+}
 
 //MARK: - Game Actions -
 private extension GameCollectionViewController
@@ -445,15 +520,20 @@ private extension GameCollectionViewController
         
         switch game.type
         {
-        case GameType.unknown: return [cancelAction, renameAction, changeArtworkAction, shareAction, deleteAction]
-        case .ds where game.identifier == Game.melonDSBIOSIdentifier: return [cancelAction, renameAction, changeArtworkAction, changeControllerSkinAction, saveStatesAction]
-        default: return [cancelAction, renameAction, changeArtworkAction, changeControllerSkinAction, shareAction, saveStatesAction, importSaveFile, exportSaveFile, deleteAction]
+        case GameType.unknown:
+            return [cancelAction, renameAction, changeArtworkAction, shareAction, deleteAction]
+        case .ds where game.identifier == Game.melonDSBIOSIdentifier || game.identifier == Game.melonDSDSiBIOSIdentifier:
+            return [cancelAction, renameAction, changeArtworkAction, changeControllerSkinAction, saveStatesAction]
+        default:
+            return [cancelAction, renameAction, changeArtworkAction, changeControllerSkinAction, shareAction, saveStatesAction, importSaveFile, exportSaveFile, deleteAction]
         }
     }
     
     func delete(_ game: Game)
     {
-        let confirmationAlertController = UIAlertController(title: NSLocalizedString("Are you sure you want to delete this game? All associated data, such as saves, save states, and cheat codes, will also be deleted.", comment: ""), message: nil, preferredStyle: .actionSheet)
+        let confirmationAlertController = UIAlertController(title: NSLocalizedString("Are you sure you want to delete this game?", comment: ""),
+                                                            message: NSLocalizedString("All associated data, such as saves, save states, and cheat codes, will also be deleted.", comment: ""),
+                                                            preferredStyle: .alert)
         confirmationAlertController.addAction(UIAlertAction(title: NSLocalizedString("Delete Game", comment: ""), style: .destructive, handler: { action in
             
             DatabaseManager.shared.performBackgroundTask { (context) in
@@ -523,11 +603,19 @@ private extension GameCollectionViewController
         let importController = ImportController(documentTypes: [kUTTypeImage as String])
         importController.delegate = self
         importController.importOptions = [clipboardImportOption, photoLibraryImportOption, gamesDatabaseImportOption]
+        importController.sourceView = self._popoverSourceView
         self.present(importController, animated: true, completion: nil)
     }
     
     func changeArtwork(for game: Game, toImageAt url: URL?, errors: [Error])
     {
+        defer {
+            if let temporaryImageURL = url
+            {
+                try? FileManager.default.removeItem(at: temporaryImageURL)
+            }
+        }
+        
         var errors = errors
         
         var imageURL: URL?
@@ -543,7 +631,8 @@ private extension GameCollectionViewController
                     if
                         let image = UIImage(data: imageData),
                         let resizedImage = image.resizing(toFit: CGSize(width: 300, height: 300)),
-                        let resizedData = resizedImage.jpegData(compressionQuality: 0.85)
+                        let rotatedImage = resizedImage.rotatedToIntrinsicOrientation(), // in case image was imported directly from Files
+                        let resizedData = rotatedImage.pngData()
                     {
                         let destinationURL = DatabaseManager.artworkURL(for: game)
                         try resizedData.write(to: destinationURL, options: .atomic)
@@ -569,6 +658,14 @@ private extension GameCollectionViewController
         
         if let imageURL = imageURL
         {
+            self.dataSource.prefetchItemCache.removeObject(forKey: game)
+            
+            if let cacheManager = SDWebImageManager.shared()
+            {
+                let cacheKey = cacheManager.cacheKey(for: imageURL)
+                cacheManager.imageCache.removeImage(forKey: cacheKey)
+            }
+            
             DatabaseManager.shared.performBackgroundTask { (context) in
                 let temporaryGame = context.object(with: game.objectID) as! Game
                 temporaryGame.artworkURL = imageURL
@@ -578,6 +675,15 @@ private extension GameCollectionViewController
                 SyncManager.shared.recordController?.updateRecord(for: temporaryGame)
                 
                 DispatchQueue.main.async {
+                    if let indexPath = self.dataSource.fetchedResultsController.indexPath(forObject: game)
+                    {
+                        // Manually reload item because collection view may not be in window hierarchy,
+                        // which means it won't automatically update when we save the context.
+                        // 手动重新加载项目，因为集合视图可能不在窗口层次结构中，
+                                                 // 这意味着当我们保存上下文时它不会自动更新。
+                        self.collectionView.reloadItems(at: [indexPath])
+                    }
+                    
                     self.presentedViewController?.dismiss(animated: true, completion: nil)
                 }
             }
@@ -609,26 +715,36 @@ private extension GameCollectionViewController
     
     func share(_ game: Game)
     {
-        let temporaryDirectory = FileManager.default.temporaryDirectory.appendingPathComponent(UUID().uuidString)
-        let symbolicURL = temporaryDirectory.appendingPathComponent(game.name + "." + game.fileURL.pathExtension)
+        let temporaryDirectory = FileManager.default.temporaryDirectory.appendingPathComponent(UUID().uuidString, isDirectory: true)
+        
+        let sanitizedName = game.name.components(separatedBy: .urlFilenameAllowed.inverted).joined()
+        let temporaryURL = temporaryDirectory.appendingPathComponent(sanitizedName + "." + game.fileURL.pathExtension, isDirectory: false)
         
         do
         {
             try FileManager.default.createDirectory(at: temporaryDirectory, withIntermediateDirectories: true, attributes: nil)
                                     
-            // Create a symbolic link so we can control the file name used when sharing.
+            // Make a temporary copy so we can control the filename used when sharing.
             // Otherwise, if we just passed in game.fileURL to UIActivityViewController, the file name would be the game's SHA1 hash.
-            try FileManager.default.createSymbolicLink(at: symbolicURL, withDestinationURL: game.fileURL)
+            try FileManager.default.copyItem(at: game.fileURL, to: temporaryURL, shouldReplace: true)
         }
         catch
         {
-            print(error)
+            let alertController = UIAlertController(title: NSLocalizedString("Could Not Share Game", comment: ""), error: error)
+            self.present(alertController, animated: true, completion: nil)
+            
+            return
         }
         
         let copyDeepLinkActivity = CopyDeepLinkActivity()
         
-        let activityViewController = UIActivityViewController(activityItems: [symbolicURL, game], applicationActivities: [copyDeepLinkActivity])
+        let activityViewController = UIActivityViewController(activityItems: [temporaryURL, game], applicationActivities: [copyDeepLinkActivity])
+        activityViewController.popoverPresentationController?.sourceView = self._popoverSourceView?.superview
+        activityViewController.popoverPresentationController?.sourceRect = self._popoverSourceView?.frame ?? .zero
         activityViewController.completionWithItemsHandler = { (activityType, finished, returnedItems, error) in
+            // Make sure the user either shared the game or cancelled before deleting temporaryDirectory.
+            guard finished || activityType == nil else { return }
+            
             do
             {
                 try FileManager.default.removeItem(at: temporaryDirectory)
@@ -638,6 +754,7 @@ private extension GameCollectionViewController
                 print(error)
             }
         }
+        
         self.present(activityViewController, animated: true, completion: nil)
     }
     
@@ -693,8 +810,7 @@ private extension GameCollectionViewController
     {
         do
         {
-            let illegalCharacterSet = CharacterSet(charactersIn: "\"\\/?<>:*|")
-            let sanitizedFilename = game.name.components(separatedBy: illegalCharacterSet).joined() + "." + game.gameSaveURL.pathExtension
+            let sanitizedFilename = game.name.components(separatedBy: .urlFilenameAllowed.inverted).joined()
             
             let temporaryURL = FileManager.default.temporaryDirectory.appendingPathComponent(sanitizedFilename)
             try FileManager.default.copyItem(at: game.gameSaveURL, to: temporaryURL, shouldReplace: true)
@@ -753,6 +869,9 @@ extension GameCollectionViewController: UIViewControllerPreviewingDelegate
         
         previewingContext.sourceRect = layoutAttributes.frame
         
+        let cell = collectionView.cellForItem(at: indexPath)
+        self._popoverSourceView = cell
+        
         let game = self.dataSource.item(at: indexPath)
         
         let gameViewController = self.makePreviewGameViewController(for: game)
@@ -776,6 +895,22 @@ extension GameCollectionViewController: UIViewControllerPreviewingDelegate
             gameViewController.previewImage = UIImage(contentsOfFile: previewSaveState.imageFileURL.path)
         }
         
+        if let emulatorBridge = gameViewController.emulatorCore?.deltaCore.emulatorBridge as? MelonDSEmulatorBridge
+        {
+            //TODO: Update this to work with multiple processes by retrieving emulatorBridge directly from emulatorCore.
+
+            if game.identifier == Game.melonDSDSiBIOSIdentifier
+            {
+                emulatorBridge.systemType = .dsi
+            }
+            else
+            {
+                emulatorBridge.systemType = .ds
+            }
+
+            emulatorBridge.isJITEnabled = ProcessInfo.processInfo.isJITAvailable
+        }
+        
         let actions = self.actions(for: game).previewActions
         gameViewController.overridePreviewActionItems = actions
         
@@ -790,9 +925,16 @@ extension GameCollectionViewController: UIViewControllerPreviewingDelegate
         gameViewController.pauseEmulation()
         
         let indexPath = self.dataSource.fetchedResultsController.indexPath(forObject: game)!
-
         let fileURL = FileManager.default.uniqueTemporaryURL()
+        
+        if gameViewController.isLivePreview
+        {
             self.activeSaveState = gameViewController.emulatorCore?.saveSaveState(to: fileURL)
+        }
+        else
+        {
+            self.activeSaveState = gameViewController.previewSaveState
+        }
         
         gameViewController.emulatorCore?.stop()
         
@@ -800,6 +942,8 @@ extension GameCollectionViewController: UIViewControllerPreviewingDelegate
         
         self.launchGame(at: indexPath, clearScreen: true, ignoreAlreadyRunningError: true)
         
+        if gameViewController.isLivePreview
+        {
             do
             {
                 try FileManager.default.removeItem(at: fileURL)
@@ -810,6 +954,7 @@ extension GameCollectionViewController: UIViewControllerPreviewingDelegate
             }
         }
     }
+}
 
 //MARK: - SaveStatesViewControllerDelegate -
 /// SaveStatesViewControllerDelegate
@@ -873,6 +1018,7 @@ extension GameCollectionViewController: UICollectionViewDelegateFlowLayout
 {
     func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize
     {
+        
         let collectionViewLayout = collectionView.collectionViewLayout as! GridCollectionViewLayout
         
         let widthConstraint = self.prototypeCell.contentView.widthAnchor.constraint(equalToConstant: collectionViewLayout.itemWidth)
@@ -882,7 +1028,9 @@ extension GameCollectionViewController: UICollectionViewDelegateFlowLayout
         self.configure(self.prototypeCell, for: indexPath)
         
         let size = self.prototypeCell.contentView.systemLayoutSizeFitting(UIView.layoutFittingCompressedSize)
-        return size
+//        return size
+        return CGSize(width: 150, height: 150)
+
     }
 }
 
@@ -894,15 +1042,31 @@ extension GameCollectionViewController
         let game = self.dataSource.item(at: indexPath)
         let actions = self.actions(for: game)
         
+        let cell = self.collectionView.cellForItem(at: indexPath)
+        self._popoverSourceView = cell
+                
         return UIContextMenuConfiguration(identifier: indexPath as NSIndexPath, previewProvider: { [weak self] in
             guard let self = self else { return nil }
             
+            do
+            {
+                try self.validateLaunchingGame(game, ignoringErrors: [LaunchError.alreadyRunning])
+            }
+            catch
+            {
+                print("Error trying to preview game:", error)
+                return nil
+            }
+                        
             let previewViewController = self.makePreviewGameViewController(for: game)
+            previewViewController.isLivePreview = Settings.isPreviewsEnabled
+            
+            guard previewViewController.isLivePreview || previewViewController.previewSaveState != nil else { return nil }
             self._previewTransitionViewController = previewViewController
             
             return previewViewController
         }) { suggestedActions in
-            return UIMenu(title: "", children: actions.menuActions)
+            return UIMenu(title: game.name, children: actions.menuActions)
         }
     }
     

Delta/Game Selection/GamesViewController.swift

@@ -47,6 +47,7 @@ class GamesViewController: UIViewController
     private let fetchedResultsController: NSFetchedResultsController<NSFetchRequestResult>
     
     private var searchController: RSTSearchController?
+    private lazy var importController: ImportController = self.makeImportController()
     
     private var syncingToastView: RSTToastView? {
         didSet {
@@ -58,6 +59,8 @@ class GamesViewController: UIViewController
     }
     private var syncingProgressObservation: NSKeyValueObservation?
     
+    @IBOutlet private var importButton: UIBarButtonItem!
+    
     override init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: Bundle?) {
         fatalError("initWithNibName: not implemented")
     }
@@ -75,9 +78,16 @@ class GamesViewController: UIViewController
         
         NotificationCenter.default.addObserver(self, selector: #selector(GamesViewController.syncingDidStart(_:)), name: SyncCoordinator.didStartSyncingNotification, object: nil)
         NotificationCenter.default.addObserver(self, selector: #selector(GamesViewController.syncingDidFinish(_:)), name: SyncCoordinator.didFinishSyncingNotification, object: nil)
-        NotificationCenter.default.addObserver(self, selector: #selector(GamesViewController.settingsDidChange(_:)), name: .settingsDidChange, object: nil)
+        NotificationCenter.default.addObserver(self, selector: #selector(GamesViewController.settingsDidChange(_:)), name: Settings.didChangeNotification, object: nil)
         NotificationCenter.default.addObserver(self, selector: #selector(GamesViewController.emulationDidQuit(_:)), name: EmulatorCore.emulationDidQuitNotification, object: nil)
     }
+    
+    @IBAction func importfilesBtn(_ sender: UIButton) {
+        
+        self.present(self.importController, animated: true, completion: nil)
+        
+        
+    }
 }
 
 //MARK: - UIViewController -
@@ -90,9 +100,16 @@ extension GamesViewController
         
         self.placeholderView = RSTPlaceholderView(frame: self.view.bounds)
         self.placeholderView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
-        self.placeholderView.textLabel.text = NSLocalizedString("No Games", comment: "")
-        self.placeholderView.detailTextLabel.text = NSLocalizedString("You can import games by pressing the + button in the top right.", comment: "")
+        self.placeholderView.textLabel.text = NSLocalizedString("", comment: "")
+        self.placeholderView.detailTextLabel.text = NSLocalizedString("You have not added any games", comment: "")
+        
+        let placeholderImagV = UIImageView(image: UIImage(named: "nogame"))
+        placeholderImagV.frame = CGRect(x: (self.view.bounds.width - 87) / 2, y: (self.view.bounds.height - (placeholderImagV.bounds.height + 80)) / 2, width: 87, height: 64)
+        placeholderImagV.contentMode = .center
+       
+        
         self.view.insertSubview(self.placeholderView, at: 0)
+        self.placeholderView.addSubview(placeholderImagV)
         
         self.pageControl = UIPageControl()
         self.pageControl.translatesAutoresizingMaskIntoConstraints = false
@@ -105,25 +122,47 @@ extension GamesViewController
         self.pageControl.centerXAnchor.constraint(equalTo: (self.navigationController?.toolbar.centerXAnchor)!, constant: 0).isActive = true
         self.pageControl.centerYAnchor.constraint(equalTo: (self.navigationController?.toolbar.centerYAnchor)!, constant: 0).isActive = true
         
-        if let navigationController = self.navigationController
-        {
-            if #available(iOS 13.0, *)
-            {
-                navigationController.overrideUserInterfaceStyle = .dark
+//        if let navigationController = self.navigationController
+//        {
+//            if #available(iOS 13.0, *)
+//            {
+//                navigationController.overrideUserInterfaceStyle = .dark
+//                
+//                let navigationBarAppearance = navigationController.navigationBar.standardAppearance.copy()
+//                navigationBarAppearance.backgroundEffect = UIBlurEffect(style: .dark)
+//                navigationController.navigationBar.standardAppearance = navigationBarAppearance
+//                navigationController.navigationBar.scrollEdgeAppearance = navigationBarAppearance
+//                
+//                let toolbarAppearance = navigationController.toolbar.standardAppearance.copy()
+//                toolbarAppearance.backgroundEffect = UIBlurEffect(style: .dark)
+//                navigationController.toolbar.standardAppearance = toolbarAppearance
+//                
+//                if #available(iOS 15, *)
+//                {
+//                    navigationController.toolbar.scrollEdgeAppearance = toolbarAppearance
+//                }
+//            }
+//            else
+//            {
+//                navigationController.navigationBar.barStyle = .blackTranslucent
+//                navigationController.toolbar.barStyle = .blackTranslucent
+//            }            
+//        }
         
-                let navigationBarAppearance = navigationController.navigationBar.standardAppearance.copy()
-                navigationBarAppearance.backgroundEffect = UIBlurEffect(style: .dark)
-                navigationController.navigationBar.standardAppearance = navigationBarAppearance
+        if #available(iOS 14, *)
+        {
+            self.importController.presentingViewController = self
             
-                let toolbarAppearance = navigationController.toolbar.standardAppearance.copy()
-                toolbarAppearance.backgroundEffect = UIBlurEffect(style: .dark)
-                navigationController.toolbar.standardAppearance = toolbarAppearance                
+            let importActions = self.importController.makeActions().menuActions
+            let importMenu = UIMenu(title: NSLocalizedString("Import From…", comment: ""), image: UIImage(systemName: "square.and.arrow.down"), children: importActions)
+            self.importButton.menu = importMenu
+
+            self.importButton.action = nil
+            self.importButton.target = nil
         }
         else
         {
-                navigationController.navigationBar.barStyle = .blackTranslucent
-                navigationController.toolbar.barStyle = .blackTranslucent
-            }            
+            self.importController.barButtonItem = self.importButton
         }
         
         self.prepareSearchController()
@@ -227,6 +266,7 @@ private extension GamesViewController
             return nil
         }
         self.searchController?.searchBar.barStyle = .black
+        self.searchController?.searchBar.placeholder = "Game here"
         
         self.navigationItem.searchController = self.searchController
         self.navigationItem.hidesSearchBarWhenScrolling = false
@@ -329,7 +369,8 @@ private extension GamesViewController
                     
                     self.pageViewController.setViewControllers([viewController], direction: .forward, animated: false, completion: nil)
                     
-                    self.title = viewController.title
+//                    self.title = viewController.title
+                    self.title = ""
                     self.pageControl.currentPage = index
                 }
             }
@@ -352,26 +393,40 @@ private extension GamesViewController
 /// Importing
 extension GamesViewController: ImportControllerDelegate
 {
-    @IBAction private func importFiles()
+    private func makeImportController() -> ImportController
     {
         var documentTypes = Set(System.registeredSystems.map { $0.gameType.rawValue })
         documentTypes.insert(kUTTypeZipArchive as String)
+        documentTypes.insert("com.rileytestut.delta.skin")
+        
+        #if BETA
+        // .bin files (Genesis ROMs)
+        documentTypes.insert("com.apple.macbinary-archive")
+        #endif
         
         // Add GBA4iOS's exported UTIs in case user has GBA4iOS installed (which may override Delta's UTI declarations)
         documentTypes.insert("com.rileytestut.gba")
         documentTypes.insert("com.rileytestut.gbc")
         documentTypes.insert("com.rileytestut.gb")
         
-        documentTypes.insert("com.rileytestut.delta.skin")
-        
-        let itunesImportOption = iTunesImportOption(presentingViewController: self)
+//        let itunesImportOption = iTunesImportOption(presentingViewController: self)
         
         let importController = ImportController(documentTypes: documentTypes)
         importController.delegate = self
-        importController.importOptions = [itunesImportOption]
-        self.present(importController, animated: true, completion: nil)
+//        importController.importOptions = [itunesImportOption]
+        
+        return importController
     }
     
+    @IBAction private func importFiles()
+    {
+        self.present(self.importController, animated: true, completion: nil)
+    }
+    
+    
+    
+    
+    
     func importController(_ importController: ImportController, didImportItemsAt urls: Set<URL>, errors: [Error])
     {
         for error in errors
@@ -421,6 +476,8 @@ private extension GamesViewController
         SyncManager.shared.sync()
     }
     
+    
+    
     func showSyncingToastViewIfNeeded()
     {
         guard let coordinator = SyncManager.shared.coordinator, let syncProgress = SyncManager.shared.syncProgress, coordinator.isSyncing && self.syncingToastView == nil else { return }
@@ -611,7 +668,7 @@ extension GamesViewController: NSFetchedResultsControllerDelegate
 
 extension GamesViewController: UIAdaptivePresentationControllerDelegate
 {
-    func presentationControllerWillDismiss(_ presentationController: UIPresentationController)
+    func presentationControllerDidDismiss(_ presentationController: UIPresentationController)
     {
         self.sync()
     }

Delta/Importing/Import Options/ClipboardImportOption.swift

@@ -20,7 +20,10 @@ struct ClipboardImportOption: ImportOption
     {
         guard UIPasteboard.general.hasImages else { return completionHandler([]) }
                 
-        guard let data = UIPasteboard.general.data(forPasteboardType: kUTTypeImage as String) else { return completionHandler([]) }
+        guard let image = UIPasteboard.general.image,
+              let rotatedImage = image.rotatedToIntrinsicOrientation(),
+              let data = rotatedImage.pngData()
+        else { return completionHandler([]) }
         
         do
         {

Delta/Importing/Import Options/PhotoLibraryImportOption.swift

@@ -42,7 +42,7 @@ extension PhotoLibraryImportOption: UIImagePickerControllerDelegate, UINavigatio
 {
     func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any])
     {
-        guard let image = info[.originalImage] as? UIImage, let data = image.jpegData(compressionQuality: 0.85) else {
+        guard let image = info[.originalImage] as? UIImage, let rotatedImage = image.rotatedToIntrinsicOrientation(), let data = rotatedImage.pngData() else {
             self.completionHandler?([])
             return
         }

Delta/Importing/Import Options/iTunesImportOption.swift

@@ -13,7 +13,7 @@ import DeltaCore
 struct iTunesImportOption: ImportOption
 {
     let title = NSLocalizedString("iTunes", comment: "")
-    let image: UIImage? = nil
+    let image: UIImage? = UIImage(symbolNameIfAvailable: "music.note")
     
     private let presentingViewController: UIViewController
     

Delta/Importing/ImportController.swift

@@ -8,6 +8,7 @@
 
 import UIKit
 import MobileCoreServices
+import UniformTypeIdentifiers
 import ObjectiveC
 
 import DeltaCore
@@ -37,7 +38,10 @@ class ImportController: NSObject
     var delegate: ImportControllerDelegate?
     var importOptions: [ImportOption]?
     
-    private weak var presentingViewController: UIViewController?
+    weak var presentingViewController: UIViewController?
+    
+    weak var barButtonItem: UIBarButtonItem?
+    weak var sourceView: UIView?
     
     // Store presentedViewController separately, since when we dismiss we don't know if it has already been dismissed.
     // Calling dismiss on presentingViewController in that case would dismiss presentingViewController, which is bad.
@@ -61,26 +65,54 @@ class ImportController: NSObject
         super.init()
     }
     
+    func makeActions() -> [Action]
+    {
+        assert(self.presentingViewController != nil, "presentingViewController must be set before calling makeActions()")
+        
+        var actions = (self.importOptions ?? []).map { (option) -> Action in
+            let action = Action(title: option.title, style: .default, image: option.image) { _ in
+                option.import { importedURLs in
+                    self.finish(with: importedURLs, errors: [])
+                }
+            }
+            
+            return action
+        }
+        
+        let filesAction = Action(title: NSLocalizedString("Files", comment: ""), style: .default, image: UIImage(symbolNameIfAvailable: "doc")) { action in
+            self.presentDocumentBrowser()
+        }
+        actions.append(filesAction)
+        
+        return actions
+    }
+    
     fileprivate func presentImportController(from presentingViewController: UIViewController, animated: Bool, completionHandler: (() -> Void)?)
     {
         self.presentingViewController = presentingViewController
         
+        let actions = self.makeActions()
+        
+        if actions.count > 1
+        {
             let alertController = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
             alertController.addAction(UIAlertAction.cancel)
             
-        if let importOptions = self.importOptions
+            let alertActions = actions.map { UIAlertAction($0) }
+            for action in alertActions
             {
-            for importOption in importOptions
-            {
-                alertController.add(importOption) { [unowned self] (urls) in
-                    self.finish(with: urls, errors: [])
-                }
+                alertController.addAction(action)
             }
             
-            let filesAction = UIAlertAction(title: NSLocalizedString("Files", comment: ""), style: .default) { (action) in
-                self.presentDocumentBrowser()
+            if let sourceView = self.sourceView
+            {
+                alertController.popoverPresentationController?.sourceView = sourceView.superview
+                alertController.popoverPresentationController?.sourceRect = sourceView.frame
+            }
+            else
+            {
+                alertController.popoverPresentationController?.barButtonItem = self.barButtonItem
             }
-            alertController.addAction(filesAction)
             
             self.presentedViewController = alertController
             self.presentingViewController?.present(alertController, animated: true, completion: nil)
@@ -116,18 +148,38 @@ class ImportController: NSObject
     
     private func presentDocumentBrowser()
     {
-        let cancelButton = UIBarButtonItem(barButtonSystemItem: .cancel, target: self, action: #selector(ImportController.cancel))
+        let supportedTypes = self.documentTypes.compactMap { UTType($0) }
         
-        let documentBrowserViewController = UIDocumentBrowserViewController(forOpeningFilesWithContentTypes: Array(self.documentTypes))
+        let presentedViewController: UIViewController
+        
+        if #available(iOS 17, *)
+        {
+            // Prior to iOS 17, UIDocumentPickerViewController was too buggy to reliably use with iCloud Drive.
+            
+            let documentPickerViewController = UIDocumentPickerViewController(forOpeningContentTypes: supportedTypes, asCopy: true)
+            documentPickerViewController.delegate = self
+            documentPickerViewController.overrideUserInterfaceStyle = .dark
+            documentPickerViewController.allowsMultipleSelection = true
+            
+            presentedViewController = documentPickerViewController
+        }
+        else
+        {
+            let documentBrowserViewController = UIDocumentBrowserViewController(forOpening: supportedTypes)
             documentBrowserViewController.delegate = self
             documentBrowserViewController.modalPresentationStyle = .fullScreen
             documentBrowserViewController.browserUserInterfaceStyle = .dark
             documentBrowserViewController.allowsPickingMultipleItems = true
             documentBrowserViewController.allowsDocumentCreation = false
+            
+            let cancelButton = UIBarButtonItem(barButtonSystemItem: .cancel, target: self, action: #selector(ImportController.cancel))
             documentBrowserViewController.additionalTrailingNavigationBarButtonItems = [cancelButton]
                         
-        self.presentedViewController = documentBrowserViewController
-        self.presentingViewController?.present(documentBrowserViewController, animated: true, completion: nil)
+            presentedViewController = documentBrowserViewController
+        }
+        
+        self.presentedViewController = presentedViewController
+        self.presentingViewController?.present(presentedViewController, animated: true, completion: nil)
     }
 }
 
@@ -164,9 +216,22 @@ extension ImportController
     }
 }
 
+extension ImportController: UIDocumentPickerDelegate
+{
+    func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt documentURLs: [URL])
+    {
+        self.finish(with: Set(documentURLs), errors: [])
+    }
+    
+    func documentPickerWasCancelled(_ controller: UIDocumentPickerViewController)
+    {
+        self.cancel()
+    }
+}
+
 extension ImportController: UIDocumentBrowserViewControllerDelegate
 {
-    func documentBrowser(_ controller: UIDocumentBrowserViewController, didPickDocumentURLs documentURLs: [URL])
+    func documentBrowser(_ controller: UIDocumentBrowserViewController, didPickDocumentsAt documentURLs: [URL])
     {
         var coordinatedURLs = Set<URL>()
         var errors = [Error]()
@@ -198,7 +263,7 @@ private var ImportControllerKey: UInt8 = 0
 
 extension UIViewController
 {
-    fileprivate(set) var importController: ImportController?
+    fileprivate var importController: ImportController?
     {
         set
         {

Delta/Launch/LaunchViewController.swift

@@ -13,7 +13,9 @@ import Harmony
 
 class LaunchViewController: RSTLaunchViewController
 {
+    
     @IBOutlet private var gameViewContainerView: UIView!
+    
     private var gameViewController: GameViewController!
     
     private var presentedGameViewController: Bool = false
@@ -76,7 +78,42 @@ extension LaunchViewController
             }
         }
         
-        return [isDatabaseManagerStarted, isSyncingManagerStarted]
+        // Repair database _after_ starting SyncManager so we can access RecordController.
+        let isDatabaseRepaired = RSTLaunchCondition(condition: { !UserDefaults.standard.shouldRepairDatabase }) { completionHandler in
+            func finish()
+            {
+                UserDefaults.standard.shouldRepairDatabase = false
+                completionHandler(nil)
+            }
+            
+            do
+            {
+                let fetchRequest = Game.fetchRequest()
+                fetchRequest.fetchLimit = 1
+                
+                let isDatabaseEmpty = try DatabaseManager.shared.viewContext.count(for: fetchRequest) == 0
+                guard !isDatabaseEmpty else {
+                    // Database has no games, so no need to repair database.
+                    finish()
+                    return
+                }
+            }
+            catch
+            {
+                print("Failed to fetch games at launch, repairing database just to be safe.", error)
+            }
+            
+            let repairViewController = RepairDatabaseViewController()
+            repairViewController.completionHandler = { [weak repairViewController] in
+                repairViewController?.dismiss(animated: true)
+                finish()
+            }
+            
+            let navigationController = UINavigationController(rootViewController: repairViewController)
+            self.present(navigationController, animated: true)
+        }
+        
+        return [isDatabaseManagerStarted, isSyncingManagerStarted, isDatabaseRepaired]
     }
     
     override func handleLaunchError(_ error: Error)

Delta/Pause Menu/Cheats/CheatValidator.swift

@@ -12,13 +12,26 @@ import DeltaCore
 
 extension CheatValidator
 {
-    enum Error: Swift.Error
+    enum Error: LocalizedError
     {
         case invalidCode
         case invalidName
         case invalidGame
         case duplicateName
         case duplicateCode
+        case unknownCheatType
+        
+        var errorDescription: String? {
+            switch self
+            {
+            case .invalidCode: return NSLocalizedString("The cheat code isn't in the correct format.", comment: "")
+            case .invalidName: return NSLocalizedString("The name of this cheat is invalid.", comment: "")
+            case .invalidGame: return NSLocalizedString("There is no associated game with this cheat.", comment: "")
+            case .duplicateName: return NSLocalizedString("A cheat already exists with this name.", comment: "")
+            case .duplicateCode: return NSLocalizedString("A cheat already exists with this code.", comment: "")
+            case .unknownCheatType: return NSLocalizedString("Delta does not support this cheat type.", comment: "")
+            }
+        }
     }
 }
 

Delta/Pause Menu/Cheats/CheatsViewController.swift

@@ -8,8 +8,10 @@
 
 import UIKit
 import CoreData
+import SwiftUI
 
 import DeltaCore
+import MelonDSDeltaCore
 
 import Roxas
 
@@ -30,6 +32,8 @@ class CheatsViewController: UITableViewController
     weak var delegate: CheatsViewControllerDelegate?
     
     private let dataSource = RSTFetchedResultsTableViewDataSource<Cheat>(fetchedResultsController: NSFetchedResultsController())
+    
+    private var cheatBaseCheats: [CheatMetadata]?
 }
 
 extension CheatsViewController
@@ -61,6 +65,21 @@ extension CheatsViewController
         self.tableView.separatorEffect = vibrancyEffect
         
         self.registerForPreviewing(with: self, sourceView: self.tableView)
+        
+        if #available(iOS 14, *)
+        {
+            self.updateAddCheatMenu()
+        }
+    }
+    
+    override func viewWillAppear(_ animated: Bool)
+    {
+        super.viewWillAppear(animated)
+        
+        if #available(iOS 14, *), self.cheatBaseCheats == nil
+        {
+            self.fetchCheatBaseCheats()
+        }
     }
 
     override func didReceiveMemoryWarning()
@@ -91,6 +110,37 @@ private extension CheatsViewController
         
         self.dataSource.fetchedResultsController = NSFetchedResultsController(fetchRequest: fetchRequest, managedObjectContext: DatabaseManager.shared.viewContext, sectionNameKeyPath: nil, cacheName: nil)
     }
+    
+    @available(iOS 14, *) @MainActor
+    func updateAddCheatMenu()
+    {
+        // CheatBase only contains DS cheats for now, so hide option completely for other systems.
+        guard self.game.type == .ds else { return }
+        
+        var searchCheatBaseTitle = NSLocalizedString("Search CheatBase", comment: "")
+        var attributes: UIMenuElement.Attributes = []
+        
+        if let cheats = self.cheatBaseCheats, cheats.isEmpty
+        {
+            searchCheatBaseTitle = NSLocalizedString("No Cheats in CheatBase", comment: "")
+            attributes = [.disabled]
+        }
+        
+        let addCheatMenu = UIMenu(children: [
+            UIAction(title: NSLocalizedString("New Cheat Code", comment: ""), image: UIImage(systemName: "square.and.pencil")) { [weak self] _ in
+                self?.addCheat()
+            },
+            
+            UIAction(title: searchCheatBaseTitle, image: UIImage(systemName: "magnifyingglass"), attributes: attributes) { [weak self] _ in
+                self?.searchCheatBase()
+            },
+        ])
+        
+        self.navigationItem.rightBarButtonItem?.target = nil
+        self.navigationItem.rightBarButtonItem?.action = nil
+        
+        self.navigationItem.rightBarButtonItem?.menu = addCheatMenu
+    }
 }
 
 //MARK: - Managing Cheats -
@@ -103,6 +153,78 @@ private extension CheatsViewController
         editCheatViewController.presentWithPresentingViewController(self)
     }
     
+    @available(iOS 14, *)
+    func fetchCheatBaseCheats()
+    {
+        Task {
+            do
+            {
+                let cheatBase = try CheatBase()
+                let cheats = try await cheatBase.cheats(for: self.game) ?? []
+                self.cheatBaseCheats = cheats
+                
+                self.updateAddCheatMenu()
+            }
+            catch
+            {
+                print("[RSTLog] Failed to prefetch cheats from CheatBase:", error)
+            }
+        }
+    }
+    
+    @available(iOS 14, *)
+    func searchCheatBase()
+    {
+        var rootView = CheatBaseView(game: self.game, cheats: self.cheatBaseCheats)
+        rootView.cancellationHandler = { [weak self] in
+            self?.presentedViewController?.dismiss(animated: true)
+        }
+        
+        rootView.selectionHandler = { [weak self] cheatMetadata in
+            self?.saveCheatMetadata(cheatMetadata)
+            self?.presentedViewController?.dismiss(animated: true)
+        }
+        
+        let hostingController = UIHostingController(rootView: rootView)
+        self.present(hostingController, animated: true, completion: nil)
+    }
+    
+    func saveCheatMetadata(_ cheatMetadata: CheatMetadata)
+    {
+        DatabaseManager.shared.performBackgroundTask { context in
+            do
+            {
+                guard let cheatType = cheatMetadata.device.cheatType, let cheatFormat = cheatMetadata.device.cheatFormat else { throw CheatValidator.Error.unknownCheatType }
+                
+                let cheat = Cheat(context: context)
+                cheat.name = cheatMetadata.name
+                cheat.type = cheatType
+                cheat.isEnabled = true
+                
+                let sanitizedCode = cheatMetadata.code.components(separatedBy: .whitespacesAndNewlines).joined()
+                let formattedCode = sanitizedCode.formatted(with: cheatFormat)
+                cheat.code = formattedCode
+                
+                let game = context.object(with: self.game.objectID) as! Game
+                cheat.game = game
+                
+                let validator = CheatValidator(format: cheatFormat, managedObjectContext: context)
+                try validator.validate(cheat)
+                
+                self.delegate?.cheatsViewController(self, activateCheat: cheat)
+                
+                try context.save()
+            }
+            catch
+            {
+                DispatchQueue.main.async {
+                    let alertController = UIAlertController(title: NSLocalizedString("Unable to Add Cheat", comment: ""), error: error)
+                    self.present(alertController, animated: true, completion: nil)
+                }
+            }
+        }
+    }
+    
     func deleteCheat(_ cheat: Cheat)
     {
         self.delegate?.cheatsViewController(self, deactivateCheat: cheat)

Delta/Pause Menu/GridMenuViewController.swift

@@ -70,7 +70,7 @@ extension GridMenuViewController
         collectionViewLayout.usesEqualHorizontalSpacingDistributionForSingleRow = true
         
         // Manually update prototype cell properties
-        self.prototypeCell.contentView.widthAnchor.constraint(equalToConstant: collectionViewLayout.itemWidth).isActive = true
+        self.prototypeCell.contentView.widthAnchor.constraint(equalToConstant: 150).isActive = true
     }
     
     override func viewDidAppear(_ animated: Bool)
@@ -174,3 +174,31 @@ extension GridMenuViewController
     }
 }
 
+extension GridMenuViewController
+{
+    override func collectionView(_ collectionView: UICollectionView, contextMenuConfigurationForItemAt indexPath: IndexPath, point: CGPoint) -> UIContextMenuConfiguration?
+    {
+        let item = self.dataSource.item(at: indexPath)
+        guard let menu = item.menu else { return nil }
+        
+        return UIContextMenuConfiguration(identifier: indexPath as NSIndexPath, previewProvider: nil) { _ in menu }
+    }
+    
+    override func collectionView(_ collectionView: UICollectionView, previewForHighlightingContextMenuWithConfiguration configuration: UIContextMenuConfiguration) -> UITargetedPreview?
+    {
+        guard let indexPath = configuration.identifier as? IndexPath else { return nil }
+        guard let cell = collectionView.cellForItem(at: indexPath) as? GridCollectionViewCell else { return nil }
+        
+        let parameters = UIPreviewParameters()
+        parameters.backgroundColor = .clear
+        parameters.visiblePath = UIBezierPath(rect: cell.contentView.bounds)
+        
+        let preview = UITargetedPreview(view: cell.contentView, parameters: parameters)
+        return preview
+    }
+    
+    override func collectionView(_ collectionView: UICollectionView, previewForDismissingContextMenuWithConfiguration configuration: UIContextMenuConfiguration) -> UITargetedPreview?
+    {
+        return self.collectionView(collectionView, previewForHighlightingContextMenuWithConfiguration: configuration)
+    }
+}

Delta/Pause Menu/MenuItem.swift

@@ -15,6 +15,8 @@ class MenuItem: NSObject
     var image: UIImage?
     var action: ((MenuItem) -> Void)
     
+    var menu: UIMenu?
+    
     @objc dynamic var isSelected = false
     
     init(text: String, image: UIImage?, action: @escaping ((MenuItem) -> Void))

Delta/Pause Menu/PauseViewController.swift

@@ -19,7 +19,7 @@ class PauseViewController: UIViewController, PauseInfoProviding
     }
     
     var pauseItems: [MenuItem] {
-        return [self.saveStateItem, self.loadStateItem, self.cheatCodesItem, self.fastForwardItem, self.sustainButtonsItem].compactMap { $0 }
+        return [self.saveStateItem, self.loadStateItem, self.cheatCodesItem, self.fastForwardItem, self.sustainButtonsItem, self.screenshotItem].compactMap { $0 }
     }
     
     /// Pause Items
@@ -28,6 +28,7 @@ class PauseViewController: UIViewController, PauseInfoProviding
     var cheatCodesItem: MenuItem?
     var fastForwardItem: MenuItem?
     var sustainButtonsItem: MenuItem?
+    var screenshotItem: MenuItem?
     
     /// PauseInfoProviding
     var pauseText: String?
@@ -160,8 +161,9 @@ private extension PauseViewController
         self.cheatCodesItem = nil
         self.sustainButtonsItem = nil
         self.fastForwardItem = nil
+        self.screenshotItem = nil
         
-        guard self.emulatorCore != nil else { return }
+        guard let emulatorCore = self.emulatorCore else { return }
         
         self.saveStateItem = MenuItem(text: NSLocalizedString("Save State", comment: ""), image: #imageLiteral(resourceName: "SaveSaveState"), action: { [unowned self] _ in
             self.saveStatesViewControllerMode = .saving
@@ -179,6 +181,17 @@ private extension PauseViewController
         
         self.fastForwardItem = MenuItem(text: NSLocalizedString("Fast Forward", comment: ""), image: #imageLiteral(resourceName: "FastForward"), action: { _ in })
         self.sustainButtonsItem = MenuItem(text: NSLocalizedString("Hold Buttons", comment: ""), image: #imageLiteral(resourceName: "SustainButtons"), action: { _ in })
+        
+        if ExperimentalFeatures.shared.gameScreenshots.isEnabled
+        {
+            self.screenshotItem = MenuItem(text: NSLocalizedString("Screenshot", comment: ""), image: #imageLiteral(resourceName: "Screenshot"), action: { _ in })
+        }
+        
+        if ExperimentalFeatures.shared.variableFastForward.isEnabled
+        {
+            let menu = self.makeFastForwardMenu(for: emulatorCore.game)
+            self.fastForwardItem?.menu = menu
+        }
     }
     
     func updateSafeAreaInsets()
@@ -194,4 +207,56 @@ private extension PauseViewController
             self.additionalSafeAreaInsets.right = 0
         }
     }
+    
+    func makeFastForwardMenu(for game: GameProtocol) -> UIMenu?
+    {
+        guard let deltaCore = Delta.core(for: game.type), #available(iOS 15, *) else { return nil }
+        
+        let menu = UIMenu(title: NSLocalizedString("Change the Fast Forward speed for this system.", comment: ""), options: [.singleSelection], children: [
+            UIDeferredMenuElement.uncached { [weak self] completion in
+                let preferredSpeed = ExperimentalFeatures.shared.variableFastForward[game.type]
+                
+                let supportedSpeeds = FastForwardSpeed.speeds(in: deltaCore.supportedRates)
+                var actions = zip(0..., supportedSpeeds).map { (index, speed) in
+                    
+                    let state: UIAction.State = (speed == preferredSpeed) ? .on : .off
+                    let action = UIAction(title: speed.description, state: state) { action in
+                        ExperimentalFeatures.shared.variableFastForward[game.type] = speed
+                        
+                        if let fastForwardItem = self?.fastForwardItem
+                        {
+                            fastForwardItem.isSelected = true // Always enable FF after selecting speed.
+                            fastForwardItem.action(fastForwardItem)
+                        }
+                    }
+                    
+                    if #available(iOS 16, *)
+                    {
+                        let configuration = UIImage.SymbolConfiguration(hierarchicalColor: .deltaPurple)
+                        
+                        let percentage = Double(index + 1) / Double(supportedSpeeds.count)
+                        action.image = UIImage(systemName: "timelapse", variableValue: percentage, configuration: configuration)
+                    }
+                    
+                    return action
+                }
+
+                let state: UIAction.State = (preferredSpeed == nil) ? .on : .off
+                let action = UIAction(title: NSLocalizedString("Maximum", comment: ""), state: state) { action in
+                    ExperimentalFeatures.shared.variableFastForward[game.type] = nil
+                    
+                    if let fastForwardItem = self?.fastForwardItem
+                    {
+                        fastForwardItem.isSelected = true // Always enable FF after selecting speed.
+                        fastForwardItem.action(fastForwardItem)
+                    }
+                }
+                actions.append(action)
+                
+                completion(actions)
+            }
+        ])
+        
+        return menu
+    }
 }

Delta/Pause Menu/Save States/SaveStatesViewController.swift

@@ -93,14 +93,6 @@ extension SaveStatesViewController
         self.collectionView?.dataSource = self.dataSource
         self.collectionView?.prefetchDataSource = self.dataSource
         
-        let collectionViewLayout = self.collectionViewLayout as! GridCollectionViewLayout
-        let averageHorizontalInset = (collectionViewLayout.sectionInset.left + collectionViewLayout.sectionInset.right) / 2
-        let portraitScreenWidth = UIScreen.main.coordinateSpace.convert(UIScreen.main.bounds, to: UIScreen.main.fixedCoordinateSpace).width
-        
-        // Use dimensions that allow two cells to fill the screen horizontally with padding in portrait mode
-        // We'll keep the same size for landscape orientation, which will allow more to fit
-        collectionViewLayout.itemWidth = floor((portraitScreenWidth - (averageHorizontalInset * 3)) / 2)
-        
         switch self.mode
         {
         case .saving:
@@ -113,8 +105,7 @@ extension SaveStatesViewController
             self.navigationItem.rightBarButtonItems?.removeFirst()
         }
         
-        // Manually update prototype cell properties
-        self.prototypeCellWidthConstraint = self.prototypeCell.contentView.widthAnchor.constraint(equalToConstant: collectionViewLayout.itemWidth)
+        self.prototypeCellWidthConstraint = self.prototypeCell.contentView.widthAnchor.constraint(equalToConstant: 0)
         self.prototypeCellWidthConstraint.isActive = true
         
         self.prepareEmulatorCoreSaveState()
@@ -238,6 +229,26 @@ private extension SaveStatesViewController
         }
         
         self.sortButton.transform = CGAffineTransform.identity.rotated(by: Settings.sortSaveStatesByOldestFirst ? 0 : .pi)
+        
+        let collectionViewLayout = self.collectionViewLayout as! GridCollectionViewLayout
+        
+        if self.traitCollection.horizontalSizeClass == .regular
+        {
+            collectionViewLayout.itemWidth = 180
+            collectionViewLayout.minimumInteritemSpacing = 30
+        }
+        else
+        {
+            let averageHorizontalInset = (collectionViewLayout.sectionInset.left + collectionViewLayout.sectionInset.right) / 2
+            let portraitScreenWidth = UIScreen.main.coordinateSpace.convert(UIScreen.main.bounds, to: UIScreen.main.fixedCoordinateSpace).width
+            
+            // Use dimensions that allow two cells to fill the screen horizontally with padding in portrait mode
+            // We'll keep the same size for landscape orientation, which will allow more to fit
+            collectionViewLayout.itemWidth = floor((portraitScreenWidth - (averageHorizontalInset * 3)) / 2)
+        }
+        
+        // Manually update prototype cell properties
+        self.prototypeCellWidthConstraint.constant = collectionViewLayout.itemWidth
     }
     
     //MARK: - Configure Views -
@@ -769,14 +780,14 @@ extension SaveStatesViewController
         guard let actions = self.actionsForSaveState(saveState) else { return nil }
         
         return UIContextMenuConfiguration(identifier: indexPath as NSIndexPath, previewProvider: { [weak self] in
-            guard let self = self else { return nil }
+            guard let self = self, Settings.isPreviewsEnabled else { return nil }
             
             let previewGameViewController = self.makePreviewGameViewController(for: saveState)
             self._previewTransitionViewController = previewGameViewController
             
             return previewGameViewController
         }) { suggestedActions in
-            return UIMenu(title: "", children: actions.menuActions)
+            return UIMenu(title: saveState.localizedName, children: actions.menuActions)
         }
     }
     

Delta/Scenes/ExternalDisplaySceneDelegate.swift

@@ -0,0 +1,85 @@
+//
+//  ExternalDisplaySceneDelegate.swift
+//  Delta
+//
+//  Created by Riley Testut on 4/17/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import UIKit
+
+import DeltaCore
+
+extension UIApplication
+{
+    var isExternalDisplayConnected: Bool {
+        let scene = UIApplication.shared.connectedScenes.first { $0.session.role == .windowExternalDisplay }
+        return scene != nil
+    }
+    
+    var externalDisplayScene: ExternalDisplayScene? {
+        let scene = UIApplication.shared.connectedScenes.compactMap({ $0 as? ExternalDisplayScene }).first(where: { $0.session.role == .windowExternalDisplay })
+        return scene
+    }
+}
+
+class ExternalDisplayScene: UIWindowScene
+{
+    let gameViewController = DeltaCore.GameViewController()
+    
+    var game: GameProtocol? {
+        get { self.gameViewController.game }
+        set { self.gameViewController.game = newValue }
+    }
+}
+
+class ExternalDisplaySceneDelegate: UIResponder, UIWindowSceneDelegate
+{
+    var window: UIWindow?
+        
+    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions)
+    {
+        // Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
+        // If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
+        // This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).
+        guard let windowScene = scene as? UIWindowScene, let externalDisplayScene = scene as? ExternalDisplayScene else { return }
+        
+        self.window = GameWindow(windowScene: windowScene)
+        self.window?.tintColor = .deltaPurple
+        self.window?.rootViewController = externalDisplayScene.gameViewController
+        self.window?.makeKeyAndVisible()
+    }
+    
+    func sceneDidDisconnect(_ scene: UIScene)
+    {
+        // Called as the scene is being released by the system.
+        // This occurs shortly after the scene enters the background, or when its session is discarded.
+        // Release any resources associated with this scene that can be re-created the next time the scene connects.
+        // The scene may re-connect later, as its session was not necessarily discarded (see `application:didDiscardSceneSessions` instead).
+    }
+    
+    func sceneDidBecomeActive(_ scene: UIScene)
+    {
+        // Called when the scene has moved from an inactive state to an active state.
+        // Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.
+    }
+    
+    func sceneWillResignActive(_ scene: UIScene)
+    {
+        // Called when the scene will move from an active state to an inactive state.
+        // This may occur due to temporary interruptions (ex. an incoming phone call).
+    }
+    
+    func sceneWillEnterForeground(_ scene: UIScene)
+    {
+        // Called as the scene transitions from the background to the foreground.
+        // Use this method to undo the changes made on entering the background.
+    }
+    
+    func sceneDidEnterBackground(_ scene: UIScene)
+    {
+        // Called as the scene transitions from the foreground to the background.
+        // Use this method to save data, release shared resources, and store enough scene-specific state information
+        // to restore the scene back to its current state.
+    }
+}

Delta/Scenes/SceneDelegate.swift

@@ -0,0 +1,190 @@
+//
+//  SceneDelegate.swift
+//  Delta
+//
+//  Created by Riley Testut on 6/6/22.
+//  Copyright © 2022 Riley Testut. All rights reserved.
+//
+
+import UIKit
+
+import DeltaCore
+import Harmony
+
+@objc(SceneDelegate) @available(iOS 13, *)
+class SceneDelegate: UIResponder, UIWindowSceneDelegate
+{
+    var window: UIWindow? {
+        get {
+            if _window == nil
+            {
+                _window = GameWindow()
+            }
+            
+            return _window
+        }
+        set {
+            _window = newValue as? GameWindow
+        }
+    }
+    private var _window: GameWindow?
+    
+    private let deepLinkController = DeepLinkController()
+    
+    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions)
+    {
+        // Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
+        // If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
+        // This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).
+        
+        self.window?.tintColor = .deltaPurple
+        
+        if let context = connectionOptions.urlContexts.first
+        {
+            self.handle(.url(context.url))
+        }
+        
+        if let shortcutItem = connectionOptions.shortcutItem
+        {
+            self.handle(.shortcut(shortcutItem))
+        }
+        
+        self.window?.makeKeyAndVisible()
+    }
+    
+    func sceneDidDisconnect(_ scene: UIScene)
+    {
+        // Called as the scene is being released by the system.
+        // This occurs shortly after the scene enters the background, or when its session is discarded.
+        // Release any resources associated with this scene that can be re-created the next time the scene connects.
+        // The scene may re-connect later, as its session was not necessarily discarded (see `application:didDiscardSceneSessions` instead).
+    }
+    
+    func sceneDidBecomeActive(_ scene: UIScene)
+    {
+        // Called when the scene has moved from an inactive state to an active state.
+        // Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.
+    }
+    
+    func sceneWillResignActive(_ scene: UIScene)
+    {
+        // Called when the scene will move from an active state to an inactive state.
+        // This may occur due to temporary interruptions (ex. an incoming phone call).
+    }
+    
+    func sceneWillEnterForeground(_ scene: UIScene)
+    {
+        // Called as the scene transitions from the background to the foreground.
+        // Use this method to undo the changes made on entering the background.
+    }
+    
+    func sceneDidEnterBackground(_ scene: UIScene)
+    {
+        // Called as the scene transitions from the foreground to the background.
+        // Use this method to save data, release shared resources, and store enough scene-specific state information
+        // to restore the scene back to its current state.
+    }
+}
+
+@available(iOS 13, *)
+extension SceneDelegate
+{
+    func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>)
+    {
+        guard let context = URLContexts.first else { return }
+        self.handle(.url(context.url))
+    }
+    
+    func windowScene(_ windowScene: UIWindowScene, performActionFor shortcutItem: UIApplicationShortcutItem, completionHandler: @escaping (Bool) -> Void)
+    {
+        self.handle(.shortcut(shortcutItem))
+        completionHandler(true)
+    }
+}
+
+@available(iOS 13, *)
+private extension SceneDelegate
+{
+    func handle(_ deepLink: DeepLink)
+    {
+        guard DatabaseManager.shared.isStarted else {
+            // Wait until DatabaseManager is ready before handling deep link.
+            
+            // NotificationCenter.default.notifications requires iOS 15 or later :(
+            // _ = await NotificationCenter.default.notifications(named: DatabaseManager.didStartNotification).first(where: { _ in true })
+            
+            var observer: NSObjectProtocol?
+            observer = NotificationCenter.default.addObserver(forName: DatabaseManager.didStartNotification, object: DatabaseManager.shared, queue: .main) { [weak observer] _ in
+                observer.map { NotificationCenter.default.removeObserver($0) }
+                self.handle(deepLink)
+            }
+            
+            return
+        }
+        
+        DispatchQueue.main.async {
+            // DeepLinkController expects to be called from main thread.
+            
+            switch deepLink
+            {
+            case .shortcut:
+                _ = self.deepLinkController.handle(deepLink)
+                
+            case .url(let url):
+                if url.isFileURL
+                {
+                    if GameType(fileExtension: url.pathExtension) != nil || url.pathExtension.lowercased() == "zip"
+                    {
+                        self.importGame(at: url)
+                    }
+                    else if url.pathExtension.lowercased() == "deltaskin"
+                    {
+                        self.importControllerSkin(at: url)
+                    }
+                }
+                else if url.scheme?.hasPrefix("db-") == true
+                {
+                    _ = DropboxService.shared.handleDropboxURL(url)
+                }
+                else if url.scheme?.lowercased() == "delta"
+                {
+                    _ = self.deepLinkController.handle(deepLink)
+                }
+            }
+        }
+    }
+    
+    func importGame(at url: URL)
+    {
+        DatabaseManager.shared.importGames(at: [url]) { (games, errors) in
+            if errors.count > 0
+            {
+                let alertController = UIAlertController.alertController(for: .games, with: errors)
+                self.present(alertController)
+            }
+        }
+    }
+    
+    func importControllerSkin(at url: URL)
+    {
+        DatabaseManager.shared.importControllerSkins(at: [url]) { (games, errors) in
+            if errors.count > 0
+            {
+                let alertController = UIAlertController.alertController(for: .controllerSkins, with: errors)
+                self.present(alertController)
+            }
+        }
+    }
+    
+    func present(_ alertController: UIAlertController)
+    {
+        var rootViewController = self.window?.rootViewController
+        
+        while rootViewController?.presentedViewController != nil
+        {
+            rootViewController = rootViewController?.presentedViewController
+        }
+        
+        rootViewController?.present(alertController, animated: true, completion: nil)
+    }
+}

Delta/Settings/AboutVC.swift

@@ -0,0 +1,34 @@
+//
+//  AboutVC.swift
+//  Delta
+//
+//  Created by 忆海16 on 2024/5/9.
+//  Copyright © 2024 Riley Testut. All rights reserved.
+//
+
+import UIKit
+
+class AboutVC: UIViewController {
+
+    @IBOutlet weak var logoimageV: UIImageView!
+    override func viewDidLoad() {
+        super.viewDidLoad()
+
+        logoimageV.layer.cornerRadius = 10
+    }
+
+    @IBAction func done(_ sender: Any) {
+        dismiss(animated: true)
+    }
+    
+    /*
+    // MARK: - Navigation
+
+    // In a storyboard-based application, you will often want to do a little preparation before navigation
+    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
+        // Get the new view controller using segue.destination.
+        // Pass the selected object to the new view controller.
+    }
+    */
+
+}

Delta/Settings/AboutVC.xib

@@ -0,0 +1,68 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="32700.99.1234" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES">
+    <device id="retina6_1" orientation="portrait" appearance="light"/>
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="22684"/>
+        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <objects>
+        <placeholder placeholderIdentifier="IBFilesOwner" id="-1" userLabel="File's Owner" customClass="AboutVC" customModule="Retro_Game_Emulator" customModuleProvider="target">
+            <connections>
+                <outlet property="logoimageV" destination="ziO-Do-7xL" id="LQE-1P-2mg"/>
+                <outlet property="view" destination="i5M-Pr-FkT" id="sfx-zR-JGt"/>
+            </connections>
+        </placeholder>
+        <placeholder placeholderIdentifier="IBFirstResponder" id="-2" customClass="UIResponder"/>
+        <view clearsContextBeforeDrawing="NO" contentMode="scaleToFill" id="i5M-Pr-FkT">
+            <rect key="frame" x="0.0" y="0.0" width="414" height="896"/>
+            <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+            <subviews>
+                <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="About" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="rKh-5S-VFi">
+                    <rect key="frame" x="178" y="68" width="58" height="27"/>
+                    <fontDescription key="fontDescription" type="system" pointSize="22"/>
+                    <color key="textColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                    <nil key="highlightedColor"/>
+                </label>
+                <imageView clipsSubviews="YES" userInteractionEnabled="NO" contentMode="scaleAspectFit" horizontalHuggingPriority="251" verticalHuggingPriority="251" image="logo" translatesAutoresizingMaskIntoConstraints="NO" id="ziO-Do-7xL">
+                    <rect key="frame" x="137" y="125" width="140" height="140"/>
+                    <constraints>
+                        <constraint firstAttribute="height" constant="140" id="1uH-on-wZs"/>
+                        <constraint firstAttribute="width" constant="140" id="W0c-de-bK4"/>
+                    </constraints>
+                </imageView>
+                <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Version:1.0" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="5zF-2q-6sp">
+                    <rect key="frame" x="165.5" y="275" width="83" height="21"/>
+                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                    <color key="textColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                    <nil key="highlightedColor"/>
+                </label>
+                <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="system" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="nXc-vQ-hCt">
+                    <rect key="frame" x="357" y="66.5" width="37" height="30"/>
+                    <inset key="imageEdgeInsets" minX="0.0" minY="0.0" maxX="2.2250738585072014e-308" maxY="0.0"/>
+                    <state key="normal" title="Done"/>
+                    <connections>
+                        <action selector="done:" destination="-1" eventType="touchUpInside" id="ZLY-fU-FB3"/>
+                    </connections>
+                </button>
+            </subviews>
+            <viewLayoutGuide key="safeArea" id="fnl-2z-Ty3"/>
+            <color key="backgroundColor" red="0.071399740870000006" green="0.082175157959999995" blue="0.10832635309999999" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+            <constraints>
+                <constraint firstItem="nXc-vQ-hCt" firstAttribute="centerY" secondItem="rKh-5S-VFi" secondAttribute="centerY" id="2cR-wN-cus"/>
+                <constraint firstItem="5zF-2q-6sp" firstAttribute="centerX" secondItem="i5M-Pr-FkT" secondAttribute="centerX" id="574-uc-3Ic"/>
+                <constraint firstItem="rKh-5S-VFi" firstAttribute="top" secondItem="fnl-2z-Ty3" secondAttribute="top" constant="20" id="98V-2P-ZdQ"/>
+                <constraint firstItem="5zF-2q-6sp" firstAttribute="top" secondItem="ziO-Do-7xL" secondAttribute="bottom" constant="10" id="KlD-4y-BYr"/>
+                <constraint firstItem="fnl-2z-Ty3" firstAttribute="trailing" secondItem="nXc-vQ-hCt" secondAttribute="trailing" constant="20" id="PZs-sE-MjT"/>
+                <constraint firstItem="ziO-Do-7xL" firstAttribute="top" secondItem="rKh-5S-VFi" secondAttribute="bottom" constant="30" id="jZu-I1-dgp"/>
+                <constraint firstItem="rKh-5S-VFi" firstAttribute="centerX" secondItem="i5M-Pr-FkT" secondAttribute="centerX" id="qWc-Y0-H2U"/>
+                <constraint firstItem="ziO-Do-7xL" firstAttribute="centerX" secondItem="i5M-Pr-FkT" secondAttribute="centerX" id="zny-8Z-VNI"/>
+            </constraints>
+            <point key="canvasLocation" x="18" y="-12"/>
+        </view>
+    </objects>
+    <resources>
+        <image name="logo" width="1024" height="1024"/>
+    </resources>
+</document>

Delta/Settings/App Icon Shortcuts/AppIconShortcutsViewController.swift

@@ -14,7 +14,7 @@ import DeltaCore
 import Roxas
 
 @objc(SwitchTableViewCell)
-private class SwitchTableViewCell: UITableViewCell
+class SwitchTableViewCell: UITableViewCell
 {
     @IBOutlet var switchView: UISwitch!
 }
@@ -115,8 +115,8 @@ private extension AppIconShortcutsViewController
         self.dataSource.rowAnimation = .fade
         
         let placeholderView = RSTPlaceholderView()
-        placeholderView.textLabel.text = NSLocalizedString("No App Icon Shortcuts", comment: "")
-        placeholderView.detailTextLabel.text = NSLocalizedString("You can customize the shortcuts that appear when 3D Touching the app icon once you've added some games.", comment: "")
+        placeholderView.textLabel.text = NSLocalizedString("No Home Screen Shortcuts", comment: "")
+        placeholderView.detailTextLabel.text = NSLocalizedString("You can customize the shortcuts that appear when long-pressing the app icon once you've added some games.", comment: "")
         self.dataSource.placeholderView = placeholderView
     }
     
@@ -131,8 +131,11 @@ private extension AppIconShortcutsViewController
     
     func configureGameCell(_ cell: GameTableViewCell, with game: Game, for indexPath: IndexPath)
     {        
-        cell.nameLabel.textColor = .darkText
-        cell.backgroundColor = .white
+        if #available(iOS 13.0, *) {
+            cell.nameLabel?.textColor = .label
+        } else {
+            cell.nameLabel?.textColor = .darkText
+        }
                 
         cell.nameLabel.text = game.name
         cell.artworkImageView.image = #imageLiteral(resourceName: "BoxArt")
@@ -194,11 +197,9 @@ private extension AppIconShortcutsViewController
     func addShortcut(for game: Game)
     {
         guard self.shortcutsDataSource.items.count < 4 else { return }
-        
         guard !self.shortcutsDataSource.items.contains(game) else { return }
         
-        // No need to adjust destinationIndexPath, since it forwards change directly to table view.
-        let destinationIndexPath = IndexPath(row: self.shortcutsDataSource.items.count, section: 1)
+        let destinationIndexPath = IndexPath(row: self.shortcutsDataSource.items.count, section: 0)
         
         let insertion = RSTCellContentChange(type: .insert, currentIndexPath: nil, destinationIndexPath: destinationIndexPath)
         insertion.rowAnimation = .fade
@@ -264,8 +265,8 @@ extension AppIconShortcutsViewController
         
         switch (section, Settings.gameShortcutsMode)
         {
-        case (0, .recent): return NSLocalizedString("Your most recently played games will appear as shortcuts when 3D touching the app icon.", comment: "")
-        case (0, .manual): return NSLocalizedString("The games you've selected below will appear as shortcuts when 3D touching the app icon.", comment: "")
+        case (0, .recent): return NSLocalizedString("Your most recently played games will appear as shortcuts when long-pressing the app icon.", comment: "")
+        case (0, .manual): return NSLocalizedString("The games you've selected below will appear as shortcuts when long-pressing the app icon.", comment: "")
         case (1, .recent) where self.shortcutsDataSource.itemCount == 0: return NSLocalizedString("You have no recently played games.", comment: "")
         case (1, .recent): return " " // Return non-empty string since empty string changes vertical offset of section for some reason.
         case (1, .manual): return NSLocalizedString("You may have up to 4 shortcuts.", comment: "")
@@ -292,11 +293,13 @@ extension AppIconShortcutsViewController
         {
         case .none: break
         case .delete:
-            let deletion = RSTCellContentChange(type: .delete, currentIndexPath: indexPath, destinationIndexPath: nil)
+            let adjustedIndexPath = IndexPath(row: indexPath.row, section: 0)
+            
+            let deletion = RSTCellContentChange(type: .delete, currentIndexPath: adjustedIndexPath, destinationIndexPath: nil)
             deletion.rowAnimation = .fade
             
             var shortcuts = self.shortcutsDataSource.items
-            shortcuts.remove(at: indexPath.row) // No need to adjust indexPath, since it forwards change directly to table view.
+            shortcuts.remove(at: adjustedIndexPath.row)
             self.shortcutsDataSource.setItems(shortcuts, with: [deletion])
             
         case .insert:

Delta/Settings/Contributors/Contributor.swift

@@ -0,0 +1,45 @@
+//
+//  Contributor.swift
+//  Delta
+//
+//  Created by Riley Testut on 2/3/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import Foundation
+
+struct Contributor: Identifiable, Decodable
+{
+    var name: String
+    
+    var id: String {
+        // Use names as identifiers for now.
+        return self.name
+    }
+    
+    var url: URL? {
+        guard let link = self.link, let url = URL(string: link) else { return nil }
+        return url
+    }
+    private var link: String?
+    
+    var linkName: String?
+
+    var contributions: [Contribution]
+}
+
+struct Contribution: Identifiable, Decodable
+{
+    var name: String
+    
+    var id: String {
+        // Use names as identifiers for now.
+        return self.name
+    }
+    
+    var url: URL? {
+        guard let link = self.link, let url = URL(string: link) else { return nil }
+        return url
+    }
+    private var link: String?
+}

Delta/Settings/Contributors/ContributorsView.swift

@@ -0,0 +1,205 @@
+//
+//  ContributionsView.swift
+//  Delta
+//
+//  Created by Riley Testut on 2/2/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import SwiftUI
+import SafariServices
+
+@available(iOS 14, *)
+private extension NavigationLink where Label == EmptyView, Destination == EmptyView
+{
+    // Copied from https://stackoverflow.com/a/66891173
+    static var empty: NavigationLink {
+        self.init(destination: EmptyView(), label: { EmptyView() })
+    }
+}
+
+@available(iOS 14, *)
+extension ContributorsView
+{
+    fileprivate class ViewModel: ObservableObject
+    {
+        @Published
+        var contributors: [Contributor]?
+        
+        @Published
+        var error: Error?
+        
+        @Published
+        var webViewURL: URL?
+        
+        weak var hostingController: UIViewController?
+        
+        func loadContributors()
+        {
+            guard self.contributors == nil else { return }
+            
+            do
+            {
+                let fileURL = Bundle.main.url(forResource: "Contributors", withExtension: "plist")!
+                let data = try Data(contentsOf: fileURL)
+                
+                let contributors = try PropertyListDecoder().decode([Contributor].self, from: data)
+                self.contributors = contributors
+            }
+            catch
+            {
+                self.error = error
+            }
+        }
+    }
+    
+    static func makeViewController() -> UIHostingController<some View>
+    {
+        let viewModel = ViewModel()
+        let contributorsView = ContributorsView(viewModel: viewModel)
+        
+        let hostingController = UIHostingController(rootView: contributorsView)
+        hostingController.navigationItem.largeTitleDisplayMode = .never
+        hostingController.navigationItem.title = contributorsView.localizedTitle
+        
+        viewModel.hostingController = hostingController
+                
+        return hostingController
+    }
+}
+
+@available(iOS 14, *)
+struct ContributorsView: View
+{
+    @StateObject
+    private var viewModel: ViewModel
+    
+    @State
+    private var showErrorAlert: Bool = false
+    
+    private var localizedTitle: String { NSLocalizedString("Contributors", comment: "") }
+    
+    var body: some View {
+        List {
+            Section(content: {}, footer: {
+                Text("These individuals have contributed to the open-source Delta project on GitHub.\n\nThank you to all our contributors, your help is much appreciated 💜")
+                    .font(.subheadline)
+            })
+            
+            ForEach(viewModel.contributors ?? []) { contributor in
+                Section {
+                    // First row = contributor
+                    ContributionCell(name: Text(contributor.name).bold(), url: contributor.url, linkName: contributor.linkName) { webViewURL in
+                        viewModel.webViewURL = webViewURL
+                    }
+                    
+                    // Remaining rows = contributions
+                    ForEach(contributor.contributions) { contribution in
+                        ContributionCell(name: Text(contribution.name), url: contribution.url) { webViewURL in
+                            viewModel.webViewURL = webViewURL
+                        }
+                    }
+                }
+            }
+        }
+        .listStyle(.insetGrouped)
+        .navigationTitle(localizedTitle)
+        .navigationBarTitleDisplayMode(.inline)
+        .environmentObject(viewModel)
+        .alert(isPresented: $showErrorAlert) {
+            Alert(title: Text("Unable to Load Contributors"), message: Text(viewModel.error?.localizedDescription ?? ""), dismissButton: .default(Text("OK")) {
+                guard let hostingController = viewModel.hostingController else { return }
+                hostingController.navigationController?.popViewController(animated: true)
+            })
+        }
+        .onReceive(viewModel.$error) { error in
+            guard error != nil else { return }
+            showErrorAlert = true
+        }
+        .onReceive(viewModel.$webViewURL) { webViewURL in
+            guard let webViewURL else { return }
+            openURL(webViewURL)
+        }
+        .onAppear {
+            viewModel.loadContributors()
+        }
+    }
+    
+    fileprivate init(contributors: [Contributor]? = nil, viewModel: ViewModel = ViewModel())
+    {
+        if let contributors
+        {
+            // Don't overwrite passed-in viewModel.contributors if contributors is nil.
+            viewModel.contributors = contributors
+        }
+        
+        self._viewModel = StateObject(wrappedValue: viewModel)
+    }
+}
+
+@available(iOS 14, *)
+struct ContributionCell: View
+{
+    var name: Text
+    var url: URL?
+    var linkName: String?
+    
+    var action: (URL) -> Void
+    
+    var body: some View {
+        
+        let body = Button {
+            guard let url else { return }
+            
+            Task { @MainActor in
+                // Dispatch Task to avoid "Publishing changes from within view updates is not allowed, this will cause undefined behavior." runtime error on iOS 16.
+                self.action(url)
+            }
+            
+        } label: {
+            HStack {
+                self.name
+                    .font(.system(size: 17)) // Match Settings screen
+                
+                Spacer()
+                
+                if let linkName
+                {
+                    Text(linkName)
+                        .font(.system(size: 17)) // Match Settings screen
+                        .foregroundColor(.gray)
+                }
+                
+                if url != nil
+                {
+                    NavigationLink.empty
+                        .fixedSize()
+                }
+            }
+        }
+        .accentColor(.primary)
+        
+        if url != nil
+        {
+            body
+        }
+        else
+        {
+            // No URL to open, so disable cell highlighting.
+            body.buttonStyle(.plain)
+        }
+    }
+}
+
+@available(iOS 14, *)
+private extension ContributorsView
+{
+    func openURL(_ url: URL)
+    {
+        guard let hostingController = viewModel.hostingController else { return }
+        
+        let safariViewController = SFSafariViewController(url: url)
+        safariViewController.preferredControlTintColor = .deltaPurple
+        hostingController.present(safariViewController, animated: true)
+    }
+}

Delta/Settings/Controller Skins/ControllerSkinsViewController.swift

@@ -38,6 +38,8 @@ class ControllerSkinsViewController: UITableViewController
     
     private let dataSource: RSTFetchedResultsTableViewPrefetchingDataSource<ControllerSkin, UIImage>
     
+    @IBOutlet private var importControllerSkinButton: UIBarButtonItem!
+    
     required init?(coder aDecoder: NSCoder)
     {
         self.dataSource = RSTFetchedResultsTableViewPrefetchingDataSource<ControllerSkin, UIImage>(fetchedResultsController: NSFetchedResultsController())
@@ -57,9 +59,11 @@ extension ControllerSkinsViewController
         self.tableView.dataSource = self.dataSource
         self.tableView.prefetchDataSource = self.dataSource
         
+        self.importControllerSkinButton.accessibilityLabel = NSLocalizedString("Import Controller Skin", comment: "")
+        
         if !self.isResetButtonVisible
         {
-            self.navigationItem.rightBarButtonItem = nil
+            self.navigationItem.rightBarButtonItems = [self.importControllerSkinButton]
         }
     }
 
@@ -104,13 +108,13 @@ private extension ControllerSkinsViewController
     {
         guard let system = self.system, let traits = self.traits else { return }
         
-        let configuration = ControllerSkinConfigurations(traits: traits)
+        guard let configuration = ControllerSkinConfigurations(traits: traits) else { return }
         
         let fetchRequest: NSFetchRequest<ControllerSkin> = ControllerSkin.fetchRequest()
         
         if traits.device == .iphone && traits.displayType == .edgeToEdge
         {
-            let fallbackConfiguration: ControllerSkinConfigurations = (traits.orientation == .landscape) ? .standardLandscape : .standardPortrait
+            let fallbackConfiguration: ControllerSkinConfigurations = (traits.orientation == .landscape) ? .iphoneStandardLandscape : .iphoneStandardPortrait
             
             // Allow selecting skins that only support standard display types as well.
             fetchRequest.predicate = NSPredicate(format: "%K == %@ AND ((%K & %d) != 0 OR (%K & %d) != 0)",
@@ -139,6 +143,13 @@ private extension ControllerSkinsViewController
         }))
         self.present(alertController, animated: true, completion: nil)
     }
+    
+    @IBAction private func importControllerSkin()
+    {
+        let importController = ImportController(documentTypes: ["com.rileytestut.delta.skin"])
+        importController.delegate = self
+        self.present(importController, animated: true, completion: nil)
+    }
 }
 
 extension ControllerSkinsViewController
@@ -196,3 +207,41 @@ extension ControllerSkinsViewController
         return height
     }
 }
+
+extension ControllerSkinsViewController: ImportControllerDelegate
+{
+    func importController(_ importController: ImportController, didImportItemsAt urls: Set<URL>, errors: [Error])
+    {
+        for error in errors
+        {
+            print(error)
+        }
+        
+        if let error = errors.first
+        {
+            DispatchQueue.main.async {
+                self.transitionCoordinator?.animate(alongsideTransition: nil) { _ in
+                    // Wait until ImportController is dismissed before presenting alert.
+                    let alertController = UIAlertController(title: NSLocalizedString("Failed to Import Controller Skin", comment: ""), error: error)
+                    self.present(alertController, animated: true, completion: nil)
+                }
+            }
+            
+            return
+        }        
+        
+        let controllerSkinURLs = urls.filter { $0.pathExtension.lowercased() == "deltaskin" }
+        DatabaseManager.shared.importControllerSkins(at: Set(controllerSkinURLs)) { (controllerSkins, errors) in
+            if errors.count > 0
+            {
+                let alertController = UIAlertController.alertController(for: .controllerSkins, with: errors)
+                self.present(alertController, animated: true, completion: nil)
+            }
+            
+            if controllerSkins.count > 0
+            {
+                print("Imported Controller Skins:", controllerSkins.map { $0.name })
+            }
+        }
+    }
+}

Delta/Settings/Controllers/ControllerInputsViewController.swift

@@ -40,6 +40,8 @@ class ControllerInputsViewController: UIViewController
     
     private var activeCalloutView: InputCalloutView?
     
+    private var _didLayoutSubviews = false
+    
     @IBOutlet private var actionsMenuViewControllerHeightConstraint: NSLayoutConstraint!
     @IBOutlet private var cancelTapGestureRecognizer: UITapGestureRecognizer!
     
@@ -65,7 +67,15 @@ class ControllerInputsViewController: UIViewController
         
         self.gameViewController.controllerView.addReceiver(self)
         
+        if let navigationController = self.navigationController, #available(iOS 13, *)
+        {
+            navigationController.overrideUserInterfaceStyle = .dark
+            navigationController.navigationBar.scrollEdgeAppearance = navigationController.navigationBar.standardAppearance // Fixes invisible navigation bar on iPad.
+        }
+        else
+        {
             self.navigationController?.navigationBar.barStyle = .black
+        }
         
         NSLayoutConstraint.activate([self.gameViewController.gameView.centerYAnchor.constraint(equalTo: self.actionsMenuViewController.view.centerYAnchor)])
         
@@ -81,6 +91,23 @@ class ControllerInputsViewController: UIViewController
         {
             self.actionsMenuViewControllerHeightConstraint.constant = self.actionsMenuViewController.preferredContentSize.height
         }
+        
+        if let window = self.view.window, !_didLayoutSubviews
+        {
+            var traits = DeltaCore.ControllerSkin.Traits.defaults(for: window)
+            traits.orientation = .portrait
+            
+            if traits.device == .ipad
+            {
+                // Use standard iPhone skins instead of iPad skins.
+                traits.device = .iphone
+                traits.displayType = .standard
+            }
+            
+            self.gameViewController.controllerView.overrideControllerSkinTraits = traits
+            
+            _didLayoutSubviews = true
+        }
     }
     
     override func viewDidAppear(_ animated: Bool)
@@ -91,6 +118,9 @@ class ControllerInputsViewController: UIViewController
         {
             self.prepareCallouts()
         }
+        
+        // controllerView must be first responder to receive keyboard presses.
+        self.gameViewController.controllerView.becomeFirstResponder()
     }
 }
 
@@ -183,6 +213,10 @@ private extension ControllerInputsViewController
         listMenuViewController.title = NSLocalizedString("Game System", comment: "")
         
         let navigationController = UINavigationController(rootViewController: listMenuViewController)
+        if #available(iOS 13, *)
+        {
+            navigationController.navigationBar.scrollEdgeAppearance = navigationController.navigationBar.standardAppearance
+        }
         
         let popoverMenuController = PopoverMenuController(popoverViewController: navigationController)
         self.navigationItem.popoverMenuController = popoverMenuController
@@ -237,6 +271,8 @@ private extension ControllerInputsViewController
         
         self.actionsMenuViewController.items = items
         self.actionsMenuViewController.isVibrancyEnabled = false
+        
+        self.actionsMenuViewController.collectionView.backgroundColor = nil
     }
     
     func prepareCallouts()
@@ -257,6 +293,8 @@ private extension ControllerInputsViewController
         {
             let calloutView = InputCalloutView()
             calloutView.delegate = self
+            calloutView.permittedArrowDirection = .any
+            calloutView.constrainedInsets = self.view.safeAreaInsets
             self.calloutViews[AnyInput(input)] = calloutView
         }
         
@@ -399,6 +437,7 @@ private extension ControllerInputsViewController
         }
         
         let alertController = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
+        alertController.popoverPresentationController?.barButtonItem = sender
         alertController.addAction(.cancel)
         alertController.addAction(UIAlertAction(title: NSLocalizedString("Reset Controls to Defaults", comment: ""), style: .destructive, handler: { (action) in
             reset()
@@ -414,6 +453,12 @@ extension ControllerInputsViewController: UIGestureRecognizerDelegate
         return self.activeCalloutView != nil
     }
     
+    func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool
+    {
+        // Necessary to prevent other gestures (e.g. GameViewController's resumeEmulationIfNeeded() tap gesture) from cancelling tap.
+        return true
+    }
+    
     @IBAction private func handleTapGesture(_ tapGestureRecognizer: UITapGestureRecognizer)
     {
         self.updateActiveCalloutView(with: nil)
@@ -528,13 +573,19 @@ extension ControllerInputsViewController: GameControllerReceiver
 {
     func gameController(_ gameController: GameController, didActivate controllerInput: DeltaCore.Input, value: Double)
     {
-        guard self.isViewLoaded else { return }
+        guard self.isViewLoaded, value > 0.9 else { return }
         
         switch gameController
         {
         case self.gameViewController.controllerView:
             if let calloutView = self.calloutViews[AnyInput(controllerInput)]
             {
+                if controllerInput.isContinuous
+                {
+                    // Make sure we only toggle calloutView once in a single gesture.
+                    guard calloutView.state == .normal else { break }
+                }
+                
                 self.toggle(calloutView)
             }
             
@@ -558,3 +609,15 @@ extension ControllerInputsViewController: SMCalloutViewDelegate
         self.toggle(calloutView)
     }
 }
+
+extension ControllerInputsViewController: UIAdaptivePresentationControllerDelegate
+{
+    func adaptivePresentationStyle(for controller: UIPresentationController, traitCollection: UITraitCollection) -> UIModalPresentationStyle
+    {
+        switch (traitCollection.horizontalSizeClass, traitCollection.verticalSizeClass)
+        {
+        case (.regular, .regular): return .formSheet // Regular width and height, so display as form sheet
+        default: return .fullScreen // Compact width and/or height, so display full screen
+        }
+    }
+}

Delta/Settings/Controllers/ControllersSettingsViewController.swift

@@ -15,6 +15,7 @@ extension ControllersSettingsViewController
 {
     private enum Section: Int
     {
+        case none
         case localDevice
         case externalControllers
         case customizeControls
@@ -108,9 +109,18 @@ extension ControllersSettingsViewController
         switch identifier
         {
         case "controllerInputsSegue":
-            let controllerInputsViewController = (segue.destination as! UINavigationController).topViewController as! ControllerInputsViewController
+            let navigationController = segue.destination as! UINavigationController
+            
+            let controllerInputsViewController = navigationController.topViewController as! ControllerInputsViewController
             controllerInputsViewController.gameController = self.gameController
             
+            if self.view.traitCollection.userInterfaceIdiom == .pad
+            {
+                // For now, only iPads can display ControllerInputsViewController as a form sheet.
+                navigationController.modalPresentationStyle = .formSheet
+                navigationController.presentationController?.delegate = controllerInputsViewController
+            }
+            
         default: break
         }
         
@@ -131,10 +141,27 @@ private extension ControllersSettingsViewController
     {
         cell.accessoryType = .none
         cell.detailTextLabel?.text = nil
+        
+        if #available(iOS 13.0, *) {
+            cell.textLabel?.textColor = .label
+        } else {
             cell.textLabel?.textColor = .darkText
+        }
         
         switch Section(rawValue: indexPath.section)!
         {
+        case .none:
+            cell.textLabel?.text = NSLocalizedString("None", comment: "")
+            
+            if self.gameController == nil
+            {
+                cell.accessoryType = .checkmark
+            }
+            else
+            {
+                cell.accessoryType = .none
+            }
+            
         case .localDevice, .externalControllers:
             let controller: GameController
             
@@ -243,18 +270,20 @@ extension ControllersSettingsViewController
 {
     override func numberOfSections(in tableView: UITableView) -> Int
     {
-        if self.gameController == self.localDeviceController
+        if self.gameController == self.localDeviceController || self.gameController == nil
         {
-            return 2
+            return 3
         }
 
-        return 3
+        return 4
     }
     
     override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
     {
         switch Section(rawValue: section)!
         {
+        case .none where self.playerIndex == 0: return 0
+        case .none: return 1
         case .localDevice: return 1
         case .externalControllers: return self.connectedControllers.isEmpty ? 1 : self.connectedControllers.count
         case .customizeControls: return 1
@@ -280,19 +309,41 @@ extension ControllersSettingsViewController
     {
         switch Section(rawValue: section)!
         {
+        case .none: return nil
         case .localDevice: return NSLocalizedString("This Device", comment: "")
         case .externalControllers: return NSLocalizedString("Game Controllers", comment: "")
         case .customizeControls: return nil
         }
     }
+    
+    override func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat
+    {
+        switch Section(rawValue: section)!
+        {
+        case .none where self.playerIndex == 0: return 1
+        default: return UITableView.automaticDimension
+        }
+    }
+    
+    override func tableView(_ tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat
+    {
+        switch Section(rawValue: section)!
+        {
+        case .none where self.playerIndex == 0: return 1
+        default: return UITableView.automaticDimension
+        }
+    }
 }
 
 extension ControllersSettingsViewController
 {
     override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)
     {
+        let previousGameController = self.gameController
+        
         switch Section(rawValue: indexPath.section)!
         {
+        case .none: self.gameController = nil
         case .localDevice: self.gameController = self.localDeviceController
         case .externalControllers where self.connectedControllers.isEmpty: return
         case .externalControllers: self.gameController = self.connectedControllers[indexPath.row]
@@ -305,7 +356,7 @@ extension ControllersSettingsViewController
         
         let previousIndexPath: IndexPath?
         
-        if let gameController = self.gameController
+        if let gameController = previousGameController
         {
             if gameController == self.localDeviceController
             {
@@ -322,7 +373,7 @@ extension ControllersSettingsViewController
         }
         else
         {
-            previousIndexPath = nil
+            previousIndexPath = IndexPath(row: 0, section: Section.none.rawValue)
         }
         
         self.tableView.beginUpdates()

Delta/Settings/Cores/MelonDSCoreSettingsViewController.swift

@@ -9,6 +9,7 @@
 import UIKit
 import SafariServices
 import MobileCoreServices
+import CryptoKit
 
 import DeltaCore
 import MelonDSDeltaCore
@@ -22,30 +23,93 @@ private extension MelonDSCoreSettingsViewController
     enum Section: Int
     {
         case general
-        case bios
+        case airPlay
+        case performance
+        case dsBIOS
+        case dsiBIOS
         case changeCore
     }
     
-    enum BIOS: Int
+    enum AirPlayRow: Int, CaseIterable
     {
-        case bios7
-        case bios9
-        case firmware
+        case topScreenOnly
+        case layoutHorizontally
+    }
     
-        var fileURL: URL {
+    @available(iOS 13, *)
+    enum BIOSError: LocalizedError
+    {
+        case unknownSize(URL)
+        case incorrectHash(URL, hash: String, expectedHash: String)
+        case unsupportedHash(URL, hash: String)
+        case incorrectSize(URL, size: Int, validSizes: Set<ClosedRange<Measurement<UnitInformationStorage>>>)
+                
+        private static let byteFormatter: ByteCountFormatter = {
+            let formatter = ByteCountFormatter()
+            formatter.includesActualByteCount = true
+            formatter.countStyle = .binary
+            return formatter
+        }()
+        
+        var errorDescription: String? {
             switch self
             {
-            case .bios7: return MelonDSEmulatorBridge.shared.bios7URL
-            case .bios9: return MelonDSEmulatorBridge.shared.bios9URL
-            case .firmware: return MelonDSEmulatorBridge.shared.firmwareURL
+            case .unknownSize(let fileURL):
+                return String(format: NSLocalizedString("%@’s size could not be determined.", comment: ""), fileURL.lastPathComponent)
+                
+            case .incorrectHash(let fileURL, let md5Hash, let expectedHash):
+                return String(format: NSLocalizedString("%@‘s checksum does not match the expected checksum.\n\nChecksum:\n%@\n\nExpected:\n%@", comment: ""), fileURL.lastPathComponent, md5Hash, expectedHash)
+                
+            case .unsupportedHash(let fileURL, let md5Hash):
+                return String(format: NSLocalizedString("%@ is not compatible with this version of Delta.\n\nChecksum:\n%@", comment: ""), fileURL.lastPathComponent, md5Hash)
+                
+            case .incorrectSize(let fileURL, let size, let validSizes):
+                let actualSize = BIOSError.byteFormatter.string(fromByteCount: Int64(size))
+                
+                if let range = validSizes.first, validSizes.count == 1
+                {
+                    if range.lowerBound == range.upperBound
+                    {
+                        // Single value
+                        let expectedSize = BIOSError.byteFormatter.string(fromByteCount: Int64(range.lowerBound.converted(to: .bytes).value))
+                        return String(format: NSLocalizedString("%@ is %@, but expected size is %@.", comment: ""), fileURL.lastPathComponent, actualSize, expectedSize)
                     }
+                    else
+                    {
+                        // Range
+                        BIOSError.byteFormatter.includesActualByteCount = false
+                        defer { BIOSError.byteFormatter.includesActualByteCount = true }
+                        
+                        let lowerBound = BIOSError.byteFormatter.string(fromByteCount: Int64(range.lowerBound.converted(to: .bytes).value))
+                        let upperBound = BIOSError.byteFormatter.string(fromByteCount: Int64(range.upperBound.converted(to: .bytes).value))
+                        return String(format: NSLocalizedString("%@ is %@, but expected size is between %@ and %@.", comment: ""), fileURL.lastPathComponent, actualSize, lowerBound, upperBound)
+                    }
+                }
+                else
+                {
+                    var description = String(format: NSLocalizedString("%@ is %@, but expected sizes are:", comment: ""), fileURL.lastPathComponent, actualSize) + "\n"
+                    
+                    let sortedRanges = validSizes.sorted(by: { $0.lowerBound < $1.lowerBound })
+                    for range in sortedRanges
+                    {
+                        // Assume BIOS with multiple valid file sizes don't use (>1 count) ranges.
+                        description += "\n" + BIOSError.byteFormatter.string(fromByteCount: Int64(range.lowerBound.converted(to: .bytes).value))
+                    }
+                    
+                    return description
+                }
+            }
+        }
+        
+        var recoverySuggestion: String? {
+            return NSLocalizedString("Please choose a different BIOS file.", comment: "")
         }
     }
 }
 
 class MelonDSCoreSettingsViewController: UITableViewController
 {
-    private var importDestinationURL: URL?
+    private var importingBIOS: SystemBIOS?
     
     override func viewDidLoad()
     {
@@ -81,6 +145,43 @@ class MelonDSCoreSettingsViewController: UITableViewController
     }
 }
 
+private extension MelonDSCoreSettingsViewController
+{
+    func isSectionHidden(_ section: Section) -> Bool
+    {
+        #if BETA
+        let isBeta = true
+        #else
+        let isBeta = false
+        #endif
+        
+        switch section
+        {
+        case .performance:
+            // Hide AltJIT section for public builds.
+            guard isBeta else { return true }
+            
+            guard Settings.preferredCore(for: .ds) == MelonDS.core else { return true }
+            return !UIDevice.current.supportsJIT
+            
+        case .dsBIOS where Settings.preferredCore(for: .ds) == DS.core:
+            // Using DeSmuME core, which doesn't require BIOS.
+            return true
+        
+        case .dsiBIOS where Settings.preferredCore(for: .ds) == DS.core || !isBeta:
+            // Using DeSmuME core, which doesn't require BIOS,
+            // or using public Delta version, which doesn't support DSi (yet).
+            return true
+            
+        case .changeCore where !isBeta:
+            // Using public Delta version, which only supports melonDS core.
+            return true
+            
+        default: return false
+        }
+    }
+}
+
 private extension MelonDSCoreSettingsViewController
 {
     func openMetadataURL(for key: DeltaCoreMetadata.Key)
@@ -102,9 +203,9 @@ private extension MelonDSCoreSettingsViewController
         self.present(safariViewController, animated: true, completion: nil)
     }
     
-    func locate(_ bios: BIOS)
+    func locate<BIOS: SystemBIOS>(_ bios: BIOS)
     {
-        self.importDestinationURL = bios.fileURL
+        self.importingBIOS = bios
         
         var supportedTypes = [kUTTypeItem as String, kUTTypeContent as String, "com.apple.macbinary-archive" /* System UTI for .bin */]
         
@@ -166,6 +267,37 @@ private extension MelonDSCoreSettingsViewController
         }
     }
     
+    @IBAction func toggleAltJITEnabled(_ sender: UISwitch)
+    {
+        Settings.isAltJITEnabled = sender.isOn
+    }
+    
+    @IBAction func toggleTopScreenOnly(_ sender: UISwitch)
+    {
+        Settings.features.dsAirPlay.topScreenOnly = sender.isOn
+        
+        self.tableView.performBatchUpdates({
+            let layoutHorizontallyIndexPath = IndexPath(row: AirPlayRow.layoutHorizontally.rawValue, section: Section.airPlay.rawValue)
+            if sender.isOn
+            {
+                self.tableView.deleteRows(at: [layoutHorizontallyIndexPath], with: .automatic)
+            }
+            else
+            {
+                self.tableView.insertRows(at: [layoutHorizontallyIndexPath], with: .automatic)
+            }
+        }) { _ in
+            self.tableView.reloadSections([Section.airPlay.rawValue], with: .none)
+        }
+    }
+    
+    @IBAction func toggleLayoutHorizontally(_ sender: UISwitch)
+    {
+        Settings.features.dsAirPlay.layoutAxis = sender.isOn ? .horizontal : .vertical
+        
+        self.tableView.reloadSections([Section.airPlay.rawValue], with: .none)
+    }
+    
     @objc func willEnterForeground(_ notification: Notification)
     {
         self.tableView.reloadData()
@@ -174,6 +306,18 @@ private extension MelonDSCoreSettingsViewController
 
 extension MelonDSCoreSettingsViewController
 {
+    override func tableView(_ tableView: UITableView, numberOfRowsInSection sectionIndex: Int) -> Int
+    {
+        let section = Section(rawValue: sectionIndex)!
+        
+        switch section
+        {
+        case _ where isSectionHidden(section): return 0
+        case .airPlay where Settings.features.dsAirPlay.topScreenOnly: return 1 // Layout axis is irrelevant if only AirPlaying top screen.
+        default: return super.tableView(tableView, numberOfRowsInSection: sectionIndex)
+        }
+    }
+    
     override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
     {
         let cell = super.tableView(tableView, cellForRowAt: indexPath)
@@ -200,8 +344,40 @@ extension MelonDSCoreSettingsViewController
             
             cell.contentView.isHidden = (item == nil)
             
-        case .bios:
-            let bios = BIOS(rawValue: indexPath.row)!
+        case .airPlay:
+            let cell = cell as! SwitchTableViewCell
+            
+            let row = AirPlayRow.allCases[indexPath.row]
+            switch row
+            {
+            case .topScreenOnly: cell.switchView.isOn = Settings.features.dsAirPlay.topScreenOnly
+            case .layoutHorizontally: cell.switchView.isOn = (Settings.features.dsAirPlay.layoutAxis == .horizontal)
+            }
+            
+        case .performance:
+            let cell = cell as! SwitchTableViewCell
+            cell.switchView.isOn = Settings.isAltJITEnabled
+            
+        case .dsBIOS:
+            let bios = DSBIOS.allCases[indexPath.row]
+            
+            if FileManager.default.fileExists(atPath: bios.fileURL.path)
+            {
+                cell.accessoryType = .checkmark
+                cell.detailTextLabel?.text = nil
+                cell.detailTextLabel?.textColor = .gray
+            }
+            else
+            {
+                cell.accessoryType = .disclosureIndicator
+                cell.detailTextLabel?.text = NSLocalizedString("Required", comment: "")
+                cell.detailTextLabel?.textColor = .red
+            }
+            
+            cell.selectionStyle = .default
+            
+        case .dsiBIOS:
+            let bios = DSiBIOS.allCases[indexPath.row]
             
             if FileManager.default.fileExists(atPath: bios.fileURL.path)
             {
@@ -250,39 +426,51 @@ extension MelonDSCoreSettingsViewController
             let key = DeltaCoreMetadata.Key.allCases[indexPath.row]
             self.openMetadataURL(for: key)
             
-        case .bios:
-            let bios = BIOS(rawValue: indexPath.row)!
+        case .dsBIOS:
+            let bios = DSBIOS.allCases[indexPath.row]
+            self.locate(bios)
+            
+        case .dsiBIOS:
+            let bios = DSiBIOS.allCases[indexPath.row]
             self.locate(bios)
             
         case .changeCore:
             self.changeCore()
+            
+        case .airPlay, .performance: break
         }
     }
     
     override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String?
     {
-        switch Section(rawValue: section)!
+        let section = Section(rawValue: section)!
+        
+        if isSectionHidden(section)
         {
-        case .bios:
-            guard Settings.preferredCore(for: .ds) == MelonDS.core else { return nil }
-            
-        default: break
+            return nil
+        }
+        else
+        {
+            return super.tableView(tableView, titleForHeaderInSection: section.rawValue)
         }
-        
-        return super.tableView(tableView, titleForHeaderInSection: section)
     }
     
     override func tableView(_ tableView: UITableView, titleForFooterInSection section: Int) -> String?
     {
-        switch Section(rawValue: section)!
+        let section = Section(rawValue: section)!
+        switch section
         {
-        case .bios:
-            guard Settings.preferredCore(for: .ds) == MelonDS.core else { return nil }
-            
-        default: break
+        case _ where isSectionHidden(section): return nil
+        case .airPlay:
+            switch (Settings.features.dsAirPlay.topScreenOnly, Settings.features.dsAirPlay.layoutAxis)
+            {
+            case (true, _): return NSLocalizedString("When AirPlaying DS games, only the top screen will appear on the external display.", comment: "")
+            case (false, .vertical): return NSLocalizedString("When AirPlaying DS games, both screens will be stacked vertically on the external display.", comment: "")
+            case (false, .horizontal): return NSLocalizedString("When AirPlaying DS games, both screens will be placed side-by-side on the external display.", comment: "")
             }
             
-        return super.tableView(tableView, titleForFooterInSection: section)
+        default: return super.tableView(tableView, titleForFooterInSection: section.rawValue)
+        }
     }
     
     override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat
@@ -293,9 +481,6 @@ extension MelonDSCoreSettingsViewController
             let key = DeltaCoreMetadata.Key.allCases[indexPath.row]
             guard Settings.preferredCore(for: .ds)?.metadata?[key] != nil else { return  0 }
             
-        case .bios:
-            guard Settings.preferredCore(for: .ds) == MelonDS.core else { return 0 }
-            
         default: break
         }
         
@@ -304,28 +489,30 @@ extension MelonDSCoreSettingsViewController
     
     override func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat
     {
-        switch Section(rawValue: section)!
+        let section = Section(rawValue: section)!
+        
+        if isSectionHidden(section)
         {
-        case .bios:
-            guard Settings.preferredCore(for: .ds) == MelonDS.core else { return 1 }
-            
-        default: break
+            return 1
+        }
+        else
+        {
+            return super.tableView(tableView, heightForHeaderInSection: section.rawValue)
         }
-        
-        return super.tableView(tableView, heightForHeaderInSection: section)
     }
     
     override func tableView(_ tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat
     {
-        switch Section(rawValue: section)!
+        let section = Section(rawValue: section)!
+        
+        if isSectionHidden(section)
         {
-        case .bios:
-            guard Settings.preferredCore(for: .ds) == MelonDS.core else { return 1 }
-            
-        default: break
+            return 1
+        }
+        else
+        {
+            return super.tableView(tableView, heightForFooterInSection: section.rawValue)
         }
-        
-        return super.tableView(tableView, heightForFooterInSection: section)
     }
 }
 
@@ -333,28 +520,64 @@ extension MelonDSCoreSettingsViewController: UIDocumentPickerDelegate
 {
     func documentPickerWasCancelled(_ controller: UIDocumentPickerViewController)
     {
-        self.importDestinationURL = nil
+        self.importingBIOS = nil
         self.tableView.reloadData() // Reloading index path causes cell to disappear...
     }
     
     func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL])
     {
         defer {
-            self.importDestinationURL = nil
+            self.importingBIOS = nil
             self.tableView.reloadData() // Reloading index path causes cell to disappear...
         }
         
-        guard let fileURL = urls.first, let destinationURL = self.importDestinationURL else { return }
+        guard let fileURL = urls.first, let bios = self.importingBIOS else { return }
+        
+        defer { try? FileManager.default.removeItem(at: fileURL) }
         
         do
         {
-            try FileManager.default.copyItem(at: fileURL, to: destinationURL, shouldReplace: true)
-        }
-        catch
+            if #available(iOS 13.0, *)
             {
-            let title = String(format: NSLocalizedString("Could not import %@.", comment: ""), fileURL.lastPathComponent)
+                // Validate file size first (since that's easiest for users to understand).
                 
-            let alertController = UIAlertController(title: title, message: error.localizedDescription, preferredStyle: .alert)
+                let attributes = try FileManager.default.attributesOfItem(atPath: fileURL.path)
+                guard let fileSize = attributes[.size] as? Int else { throw BIOSError.unknownSize(fileURL) }
+                
+                let measurement = Measurement<UnitInformationStorage>(value: Double(fileSize), unit: .bytes)
+                guard bios.validFileSizes.contains(where: { $0.contains(measurement) }) else { throw BIOSError.incorrectSize(fileURL, size: fileSize, validSizes: bios.validFileSizes) }
+                
+                if bios.expectedMD5Hash != nil || !bios.unsupportedMD5Hashes.isEmpty
+                {
+                    // Only calculate hash if we need to.
+                    
+                    let data = try Data(contentsOf: fileURL)
+                    
+                    let md5Hash = Insecure.MD5.hash(data: data)
+                    let hashString = md5Hash.compactMap { String(format: "%02x", $0) }.joined()
+                    
+                    if let expectedMD5Hash = bios.expectedMD5Hash
+                    {
+                        guard hashString == expectedMD5Hash else { throw BIOSError.incorrectHash(fileURL, hash: hashString, expectedHash: expectedMD5Hash) }
+                    }
+                    
+                    guard !bios.unsupportedMD5Hashes.contains(hashString) else { throw BIOSError.unsupportedHash(fileURL, hash: hashString) }
+                }
+            }
+            
+            try FileManager.default.copyItem(at: fileURL, to: bios.fileURL, shouldReplace: true)
+        }
+        catch let error as NSError
+        {
+            let title = String(format: NSLocalizedString("Could not import %@.", comment: ""), bios.filename)
+
+            var message = error.localizedDescription
+            if let recoverySuggestion = error.localizedRecoverySuggestion
+            {
+                message += "\n\n" + recoverySuggestion
+            }
+            
+            let alertController = UIAlertController(title: title, message: message, preferredStyle: .alert)
             alertController.addAction(.ok)
             self.present(alertController, animated: true, completion: nil)
         }