完成时AVPlayerViewController淡出

Question

我使用AVPlayerViewController，我想要在视频结束时淡出...我可以捕获视频结束事件，并且我可以为AVPlayer编写代码，但不能为AVPlayerViewController编写代码。

self.playerItem = AVPlayerItem(URL: videoURL)
self.player = AVPlayer(playerItem: self.playerItem)
self.playerLayer = AVPlayerLayer(player: self.player)
self.streamPlayer =  AVPlayerViewController()
self.streamPlayer.player = self.player
self.streamPlayer.view.frame = CGRect(x: 128, y: 222, width: 512, height: 256)

这段代码也可以工作，但是是全屏的--我不想全屏...

//self.presentViewController(self.streamPlayer, animated: true) {
//   self.streamPlayer.player!.play()
//}

我用这个？

self.view.addSubview(self.streamPlayer.view)
self.streamPlayer.player!.play()

事件捕获..

override func viewWillAppear(animated: Bool) {
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "finishedPlaying:", name: AVPlayerItemDidPlayToEndTimeNotification, object: playerItem)
}

事件代码...

函数finishedPlaying(myNotification:NSNotification) {

    let fadeOut = CABasicAnimation(keyPath: "opacity")
    fadeOut.fromValue = 1.0
    fadeOut.toValue = 0.0
    fadeOut.duration = 8.0
    fadeOut.delegate = self
    fadeOut.setValue("video", forKey:"fadeOut")
    fadeOut.removedOnCompletion = false
    fadeOut.fillMode = kCAFillModeForwards

这一行与AVPlayerViewController无关/与AVPlayer它淡出很好吗？

    playerLayer.addAnimation(fadeOut, forKey: nil)

这只是删除了AVPlayerViewController，如果我不能让它工作，计划B！

    //self.streamPlayer.view.removeFromSuperview()
    print("VIDEO finished")
}

Answer 1

AVPlayerViewController有它自己的AVPlayerLayer，并且不知道您创建的AVPlayerLayer。因此，行playerLayer.addAnimation(fadeOut，forKey: nil)不起作用。您应该设置或动画AVPlayerViewController视图的alpha值。对于淡入淡出动画，您可能需要查看+ at查看animateWithDuration:(...)方法，并在完成处理程序中调用self.streamPlayer.view.removeFromSuperview()。