AVPlayer - UILabel在视频中不可见 [英] AVPlayer - UILabel not visible over video

问题描述

    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。我只想把视频作为背景元素。使用此代码，它似乎可以播放所有UI元素。如何让它转到后台？

I have several UILabels on this view. I just want the video as a background element really. With this code, it seems to play over all the UI elements. How do I make it go to the background?

推荐答案

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

You can use the zPosition property of the view's layer (it's a CALayer object) to change the z-index of the view.

 theView.layer.zPosition = 1;

并将标签带到前面

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