iOS启动APP，播放视频，会出现黑屏

建议换一下方式，亲测有效

 AVPlayerItem *item = [AVPlayerItemplayerItemWithURL:[[NSBundlemainBundle] URLForResource:@"q1111.mp4"withExtension:nil]];

    

    // 3.创建AVPlayer

    _player = [AVPlayerplayerWithPlayerItem:item];

    // 4.添加AVPlayerLayer

    AVPlayerLayer *playerLayer = [AVPlayerLayerplayerLayerWithPlayer:_player];

    playerLayer.frame = CGRectMake(0, 0, screenW, screenH);

    playerLayer.videoGravity =AVLayerVideoGravityResizeAspectFill;

    [self.view.layeraddSublayer:playerLayer];

    [_player play];