动画CALayer

Question

我有一个CALayer顶部的UIView。

UIView的动画正是我怎么想，但是这是在它之上的PlayerView似乎“重生”屏幕外，然后动画的立场，即UIView的在开始，然后将动画的UIViews框架。

我想知道是否有CALayers的任何属性可以自动处理这个问题，但我还没有找到任何东西。

下面是这个代码：

let window = UIApplication.shared.keyWindow! 
    v = UIView(frame: CGRect(x: window.frame.origin.x, y: window.frame.origin.y, width: window.frame.width, height: window.frame.height)) 
    let v2 = UIView(frame: .zero) 
    window.addSubview(v!); 
    window.addSubview(v2) 
    v?.backgroundColor = UIColor.black 
    v2.backgroundColor = UIColor.clear 

    v?.layer.cornerRadius = (v?.frame.width)! * 0.025 






    guard let path = Bundle.main.path(forResource: "video", ofType:"mp4") else { 
     debugPrint("video.m4v not found") 
     return 
    } 

    player = AVPlayer(url: URL(fileURLWithPath: path)) 

    playerLayer = AVPlayerLayer(player: player) 
    //  playerLayer.frame = playerView.frame 

    playerLayer?.frame = (playerView?.bounds)! 
    playerLayer?.masksToBounds = true 

    playerLayer?.videoGravity = AVLayerVideoGravityResizeAspectFill 


    v?.layer.addSublayer(playerLayer!) 

    player?.play() 
    player?.isMuted = true 

    //looper 
    NotificationCenter.default.addObserver(forName: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object: player?.currentItem, queue: nil) 
    { notification in 
     let t1 = CMTimeMake(5, 100) 
     self.player?.seek(to: t1) 

     self.player?.play() 
    } 







    let superview = playerView?.superview 

    v2.frame = (v2.convert((playerView?.frame)!, from: superview)) 
      v?.frame = (v?.convert((playerView?.frame)!, from: superview))! 

    window.addConstraintsWithFormat("H:|[v0]|", views: v!) 
    window.addConstraintsWithFormat("V:|[v0]|", views: v!) 

      playerLayer?.frame = (v?.frame)! 



       self.playerLayer?.frame = (self.v?.frame)! 


    UIView.animate(withDuration: 4, delay: 0, options: UIViewAnimationOptions.curveEaseOut, animations: { 



     self.window?.layoutIfNeeded() 

    }, completion: { (completed) in 


     self.playerLayer?.frame = (self.v?.frame)! 



    }) 


} 

有什么建议？

编辑：

我已经包含了更新后的代码

let window = UIApplication.shared.keyWindow! 
    v = UIView(frame: CGRect(x: window.frame.origin.x, y: window.frame.origin.y, width: window.frame.width, height: window.frame.height)) 
    let v2 = UIView(frame: .zero) 
    window.addSubview(v!); 

    v?.addSubview(playerView2!) 

    window.addSubview(v2) 
    v?.backgroundColor = UIColor.black 
    v2.backgroundColor = UIColor.clear 

    v?.layer.cornerRadius = (v?.frame.width)! * 0.025 










    playerView2?.layer.cornerRadius = (playerView2?.bounds.width)! * 0.025 

    guard let path = Bundle.main.path(forResource: "video", ofType:"mp4") else { 
     debugPrint("video.m4v not found") 
     return 
    } 

    player = AVPlayer(url: URL(fileURLWithPath: path)) 

    playerLayer = AVPlayerLayer(player: player) 
    //  playerLayer.frame = playerView.frame 

    playerLayer?.frame = (playerView2?.bounds)! 
    playerLayer?.masksToBounds = true 
    playerLayer?.cornerRadius = (playerView2?.bounds.width)! * 0.025 

    playerLayer?.videoGravity = AVLayerVideoGravityResizeAspectFill 


    self.playerView2?.layer.addSublayer(playerLayer!) 

//  player?.play() 
    player?.isMuted = true 

    //looper 
    NotificationCenter.default.addObserver(forName: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object: player?.currentItem, queue: nil) 
    { notification in 
     let t1 = CMTimeMake(5, 100) 
     self.player?.seek(to: t1) 

//   self.player?.play() 
    } 










    self.playerView2?.frame = (self.v?.bounds)! 
    self.playerLayer?.frame = (self.playerView?.bounds)! 





    UIView.animate(withDuration: 5, delay: 0, options: UIViewAnimationOptions.curveEaseOut, animations: { 



     self.v?.frame = window.frame 

     self.playerView2?.frame = (self.v?.frame)! 

     self.playerLayer?.frame = (self.playerView2?.frame)! 



     self.window?.layoutIfNeeded() 

    }, completion: { (completed) in 




    }) 





} 

Answer 1

当你设置playerLayer.frame你得到一个隐含的动画。

如果你不希望任何动画，暂时禁用隐式动画这样的：

 UIView.animate(withDuration: 4, delay: 0, options: UIViewAnimationOptions.curveEaseOut, animations: { 
      self.window?.layoutIfNeeded() 
     }, completion: { (completed) in 
      let priorValue = CATransaction.disableActions() 
      CATransaction.setDisableActions(true) 
      self.playerLayer?.frame = self.v!.frame 
      CATransaction.setDisableActions(priorValue) 
     }) 

如果你想动画playerLayer.frame，那么最好的办法是创建一个使用AVPlayerLayer为UIView子它的层，像这样：

class PlayerView: UIView { 
    override class var layerClass: AnyClass { return AVPlayerLayer.self } 
    private(set) lazy var playerLayer: AVPlayerLayer = { self.layer as! AVPlayerLayer }() 
} 

然后你可以使用一个PlayerView而不是裸AVPlayerLayer和使用UIKit的动画。由于无法初始化直接AVPlayerLayer（UIView使用默认的初始创建它的层），你需要设置PlayerView的球员是这样的：

 playerView?.playerLayer = player