AVPlayer *player = [AVPlayer playerWithURL:[NSURL URLWithString:@"http://flv2.bn.netease.com/videolib3/1511/30/wvCOz5519/SD/wvCOz5519-mobile.mp4"]];

    //视频展示涂层

    AVPlayerLayer *playLayer = [AVPlayerLayer playerLayerWithPlayer:self.player];

    //设置涂层的 frame

    playLayer.frame = self.view.bounds;

    //把视频展示涂层添加进 self.view 内部

    [self.view.layer addSublayer:playLayer];

    //如果是音频, 可以直接播放

    [self.player play];