这是我的代码，
@interface ViewController ()
{
AVPlayer *avPlayer;
}
@end
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
UIView *containerView = [[UIView alloc] initWithFrame:self.view.frame];
NSString *filepath = [[NSBundle mainBundle] pathForResource:@"TestVideo" ofType:@"mp4"];
AVAsset *asset = [AVAsset assetWithURL:[NSURL fileURLWithPath:filepath]];
AVPlayerItem *playerItem = [[AVPlayerItem alloc] initWithAsset:asset];
avPlayer = [AVPlayer playerWithPlayerItem:playerItem];
AVPlayerLayer *avPlayerLayer = [AVPlayerLayer playerLayerWithPlayer:avPlayer];
avPlayerLayer.frame = self.view.frame;
[containerView.layer addSublayer:avPlayerLayer];
[self.view addSubview:containerView];
[avPlayer play];
}
这确实不应该在任何iOS版本上正常工作，因为
AVPlayer *avPlayer = [AVPlayer playerWithPlayerItem:playerItem];
正在超出范围并在的末尾被释放viewDidAppear。
您应该将分配AVPlayer给类成员变量，以阻止这种情况的发生。
否则，视频文件可能有问题。
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