AVPlayer 播放本地文件

        NSString *str = [[NSBundle mainBundle] resourcePath];
        NSString *filePath = [NSString stringWithFormat:@"%@%@",str,@"/ad_video.mp4"];
        NSURL *sourceMovieURL = [NSURL fileURLWithPath:filePath];
        AVAsset *movieAsset = [AVURLAsset URLAssetWithURL:sourceMovieURL options:nil];
        AVPlayerItem *playerItem = [AVPlayerItem playerItemWithAsset:movieAsset];
        AVPlayer *player = [AVPlayer playerWithPlayerItem:playerItem];
        AVPlayerLayer *playerLayer = [AVPlayerLayer playerLayerWithPlayer:player];
        playerLayer.frame = CGRectMake(0, 0, 300, 300);

        playerLayer.videoGravity = AVLayerVideoGravityResizeAspect;
        [self.layer addSublayer:playerLayer];