104 lines
3.1 KiB
Swift
104 lines
3.1 KiB
Swift
//
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// PopoverMenuController.swift
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// Hthik
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//
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// Created by Hthik on 9/5/17.
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// Copyright © 2017 Hthik. All rights reserved.
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//
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import UIKit
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private var popoverMenuControllerKey: UInt8 = 0
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extension UINavigationItem
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{
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var popoverMenuController: PopoverMenuController? {
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get { return objc_getAssociatedObject(self, &popoverMenuControllerKey) as? PopoverMenuController }
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set {
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self.titleView = newValue?.popoverMenuButton
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objc_setAssociatedObject(self, &popoverMenuControllerKey, newValue, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
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}
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}
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}
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class PopoverMenuController: NSObject
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{
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let popoverViewController: UIViewController
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let popoverMenuButton: PopoverMenuButton
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var isActive: Bool = false {
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willSet {
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guard newValue != self.isActive else { return }
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if newValue
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{
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self.presentPopoverViewController()
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}
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else
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{
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self.dismissPopoverViewController()
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}
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}
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}
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init(popoverViewController: UIViewController)
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{
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self.popoverViewController = popoverViewController
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self.popoverMenuButton = PopoverMenuButton()
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super.init()
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self.popoverMenuButton.addTarget(self, action: #selector(PopoverMenuController.pressedPopoverMenuButton(_:)), for: .touchUpInside)
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}
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required init?(coder aDecoder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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}
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private extension PopoverMenuController
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{
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@objc func pressedPopoverMenuButton(_ button: PopoverMenuButton)
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{
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self.isActive = !self.isActive
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}
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func presentPopoverViewController()
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{
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guard !self.isActive else { return }
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guard let presentingViewController = self.popoverMenuButton.parentViewController else { return }
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self.popoverViewController.modalPresentationStyle = .popover
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self.popoverViewController.popoverPresentationController?.delegate = self
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self.popoverViewController.popoverPresentationController?.sourceView = self.popoverMenuButton.superview
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self.popoverViewController.popoverPresentationController?.sourceRect = self.popoverMenuButton.frame
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presentingViewController.present(self.popoverViewController, animated: true, completion: nil)
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}
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func dismissPopoverViewController()
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{
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guard self.isActive else { return }
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self.popoverViewController.dismiss(animated: true, completion: nil)
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}
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}
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extension PopoverMenuController: UIPopoverPresentationControllerDelegate
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{
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func adaptivePresentationStyle(for controller: UIPresentationController, traitCollection: UITraitCollection) -> UIModalPresentationStyle
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{
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// Force popover presentation, regardless of trait collection.
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return .none
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}
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func popoverPresentationControllerDidDismissPopover(_ popoverPresentationController: UIPopoverPresentationController)
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{
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self.isActive = false
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}
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}
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