Question

我一直在查看AVPlayerItem和AVPlayer文档，并且似乎没有任何关于项目完成播放的回调。我希望我们可以使用某种委托回调，或者AVPlayerActionAtItemEnd会为我们提供自定义操作。

我怎样才能找到一种方法来检测AVPlayer何时播放完一个项目？

Answer 1

播放完成后，它会使用NSNotification发出警报。

注册通知：

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(itemDidFinishPlaying:) name:AVPlayerItemDidPlayToEndTimeNotification object:playerItem];

完成后调用的方法：

-(void)itemDidFinishPlaying:(NSNotification *) notification {
    // Will be called when AVPlayer finishes playing playerItem
}

Answer 2

Swift-i-fied（第3版）

class MyVideoPlayingViewController: AVPlayerViewController {

    override func viewDidLoad() {
        // Do any additional setup after loading the view.
        super.viewDidLoad()

        let videoURL = URL(fileURLWithPath: Bundle.main.path(forResource: "MyVideo", 
                                                                  ofType: "mp4")!)
        player = AVPlayer(url: videoURL)

        NotificationCenter.default.addObserver(self,
                                           selector: #selector(MyVideoPlayingViewController.animationDidFinish(_:)),
                                           name: .AVPlayerItemDidPlayToEndTime,
                                           object: player?.currentItem)
    }

    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        player?.play()
    }

    func animationDidFinish(_ notification: NSNotification) {
        print("Animation did finish")
    }

    deinit {
        NotificationCenter.default.removeObserver(self)
    }

}

Answer 3

这就是我做到的。

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(movieFinishedCallback:) name:AVPlayerItemDidPlayToEndTimeNotification object:player.currentItem];


- (void)movieFinishedCallback:(NSNotification*)aNotification
{
   // [self dismissViewControllerAnimated:YES completion:Nil];
}

如何检测AVPlayerItem何时完成播放？

3 个答案: