ios AvPlayServiceController无法播放本地mp4

我尝试使用

avplayervewcontroller

播放mp4视频。我使用“http url”，它可以播放，但当我使用

文件url

时，它不起作用

    NSString *filePath = [[NSBundle mainBundle] pathForResource:@"mp4ForDownloadTest" ofType:@"mp4"];
if ([[NSFileManager defaultManager] fileExistsAtPath:filePath]) {
    NSURL *url = [NSURL fileURLWithPath:filePath isDirectory:NO];

    AVPlayerViewController *playerVC = [[AVPlayerViewController alloc] init];

    AVAsset *movieAsset = [AVURLAsset URLAssetWithURL:url options:nil];
    AVPlayerItem *playerItem = [AVPlayerItem playerItemWithAsset:movieAsset];
    AVPlayer *player = [AVPlayer playerWithPlayerItem:playerItem];

    playerVC.player = player;

    [self presentViewController:playerVC animated:YES completion:^{
        [player play];
    }];
}

试试这个：

        guard let path = NSBundle.mainBundle().pathForResource("drum", ofType:"mp4") else {
            break
        }

        let url = NSURL(fileURLWithPath: path)
        self.loadPlayer(url) 

然后：

private func loadPlayer(url: NSURL) {
    // present video window
    let playerItem = AVPlayerItem(URL: url)
    let player = AVPlayer.init(playerItem: playerItem)
    self.playerViewController.player = player

    self.view.addSubview(self.playerViewController.view)
    self.videoControlView.alpha = 1.0
    self.setupPlayerObserver()
    self.playPlayer()
    self.setSlider()
}