处理投接外部屏幕不合屏的问题

SwiftProject/SwiftProject/ExternalScreen/ZZHExternalViewController.swift

@@ -23,12 +23,19 @@ class ZZHExternalViewController: UIViewController {
         imageView?.snp.makeConstraints({ make in
             make.left.top.right.bottom.equalTo(0)
         })
+//        imageView?.transform = CGAffineTransform(rotationAngle: -.pi / 2)
         
         
         playerLayer = AVPlayerLayer()
-        playerLayer!.frame = self.view.bounds
+        if let externalScreen = UIScreen.screens.first(where: { $0 != UIScreen.main }) {
+            let externalScreenSize = externalScreen.bounds.size
+            playerLayer!.frame = CGRectMake(-externalScreenSize.width*0.5, -externalScreenSize.height*0.5, externalScreenSize.width*2, externalScreenSize.height*2)
+            print("外接屏幕的尺寸是: \(externalScreenSize)")
+        } else {
+            print("没有发现外接屏幕")
+        }
         self.view.layer.addSublayer(playerLayer!)
-        self.view.backgroundColor = .clear
+        self.view.backgroundColor = .orange
     }
     
     override func viewWillLayoutSubviews() {