Question

我知道AVPlayerItem（AVPlayer的子类）能够订阅AVPlayerItemDidPlayToEndTimeNotification

AVPlayer没有这样的功能，我需要使用AVPlayer，除非没有办法解决这个问题，并且知道（我的情况下是视频）的播放时间是否完整。

如何在AVPlayer中执行此操作？我阅读了这些课程的一些文档，但我没有立即得到答案。

-(void)setupVideoView{


    _videoPlayer = [AVPlayer playerWithURL:urlObjectHere];

    AVPlayerLayer *layer = [AVPlayerLayer layer];

    [layer setPlayer:_videoPlayer];
    [layer setFrame:_videoView.bounds];

    [_videoView.layer addSublayer:layer];

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




}

-(void)itemDidFinishPlaying:(NSNotification *) notification {
    // does not get called

    DLog(@"");



}

Answer 1

据我所知，AVPlayer层无法知道完整的时间。

AVAsset - AVPlayerItem - AVPlayer是AVFoundation中组合AVPlayer的三个组件。如果你想要更多的AVPlayer功能，你需要使用较低级别的AVPlayer，它们是AVAsset和AVPlayerItem。

如果您只需要AVPlayer的普通实用程序，我认为只需在AVKit中使用AVPlayerViewController。

建议不要使用MPMoviePlayer，大部分都已弃用。习惯了AVPlayer ......

Answer 2

我能够通过以下方式解决问题：我使用AVPlayerItem并从该项目创建了我的AVPlayer，将通知订阅到播放器项目。

-(void)setupVideoView{


     AVPlayerItem* playerItem = [AVPlayerItem playerItemWithURL:urlObjectHere];//edited

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

    _videoPlayer = [[AVPlayer alloc] initWithPlayerItem:playerItem];//edited

    AVPlayerLayer *layer = [AVPlayerLayer layer];

    [layer setPlayer:_videoPlayer];
    [layer setFrame:_videoView.bounds];

    [_videoView.layer addSublayer:layer];

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




}

-(void)itemDidFinishPlaying:(NSNotification *) notification {
    // gets called finally


    AVPlayerItem *p = [notification object]; //bring video back to zero
    [p seekToTime:kCMTimeZero];

    DLog(@"");



}

为活动注册AVPlayer - 如何知道AVPlayer播放电影

2 个答案: