AVPlayer – UILabel在video中不可见

NSString *urlPath; NSURL *videoUrl; urlPath = [[NSBundle mainBundle] pathForResource:@"fogLoop" ofType:@"mp4"]; videoUrl = [NSURL fileURLWithPath:urlPath]; avPlayer = [AVPlayer playerWithURL:videoUrl]; avPlayerLayer = [AVPlayerLayer playerLayerWithPlayer:avPlayer]; avPlayerLayer.frame = videoView.layer.bounds; avPlayerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill; [videoView.layer addSublayer: avPlayerLayer]; avPlayer.actionAtItemEnd = AVPlayerActionAtItemEndNone; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playerItemDidReachEnd:) name:AVPlayerItemDidPlayToEndTimeNotification object:[avPlayer currentItem]]; [avPlayer play]; 

我在这个视图上有几个UILabel。 我只想把video作为背景元素。 使用此代码，它似乎可以播放所有UI元素。 如何让它去后台？

Answer 1

您可以使用视图图层的zPosition属性（它是CALayer对象）来更改视图的z-index。

  theView.layer.zPosition = 1; 

并在前面贴上标签