iphone - AVPlayerLayer 未绑定(bind)到 UIView 框架

Question

我正在尝试将 AVPlayerLayer 添加到 UIView

    self.player = AVPlayer(URL: NSURL(fileURLWithPath: path!))
    self.playerLayer = AVPlayerLayer(player: player);
    self.playerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
    self.playerLayer.frame =  ctrVideo.bounds;
    self.ctrVideo.layer.addSublayer(playerLayer);
    player.play();

这是视频的容器(蓝色):

约束:

最终结果:

我不明白为什么视频没有绑定(bind)到 UIVIew 坐标。如果我将它绑定(bind)到 Controller 的 super View 中，就可以了。

Answer 1

当 View 的框架改变时，子图层不会自动调整大小，您必须手动调整。您可以子类化 UIView 以使其更容易。

class VideoContainerView: UIView {
  var playerLayer: CALayer?
  override func layoutSublayersOfLayer(layer: CALayer) {
    super.layoutSublayersOfLayer(layer)
    playerLayer?.frame = self.bounds
  }
}

然后在你的代码中:

self.player = AVPlayer(URL: NSURL(fileURLWithPath: path!))
self.playerLayer = AVPlayerLayer(player: player);
self.playerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
self.playerLayer.frame =  ctrVideo.bounds;
self.ctrVideo.layer.addSublayer(playerLayer);
self.ctrVideo.playerLayer = playerLayer;
player.play();

只需确保将“ctrVideo”的类从 UIView 更改为 VideoContainerView。