ios - MPMoviePlayerController:Seek Button 点击​​卡住视频 - 黑屏

Question

我正在使用 MPMoviePlayerController 播放视频。在以下情况下，我遇到黑屏，对控件的点击没有反应:

1. 用户点击快进按钮
2. 用户点击倒带按钮
3. 用户长按并快进到视频结尾

所有其他控件都按预期工作。

请注意，长按快进和快退会按预期工作。

我确实查看了下面链接中的文档。有关于用户向前和向后搜索(例如，长按)的通知；分别为 MPMoviePlaybackStateSeekingForward 和 MPMoviePlaybackStateSeekingBackward。也就是说，在搜索按钮上没有简单_点击_通知。

链接是“Here”。

为了完整起见，下面是我用来调用播放器的代码。没什么特别的；当视频结束时(观察 MPMoviePlayerPlaybackDidFinishNotification)，我倒回到开头。

NSString *path = [[NSBundle mainBundle] pathForResource:@"catSleeping" ofType:@mp4"];
_videoPlayer =  [[MPMoviePlayerController alloc]
                 initWithContentURL:[NSURL fileURLWithPath:path]];
[_videoPlayer prepareToPlay];
[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(moviePlayBackDidFinish:)
                                         name:MPMoviePlayerPlaybackDidFinishNotification
                                           object:_videoPlayer];
_videoPlayer.controlStyle = MPMovieControlStyleFullscreen;
_videoPlayer.shouldAutoplay = YES;
[self.view addSubview:_videoPlayer.view];
[_videoPlayer setFullscreen:YES animated:YES];
[_videoPlayer play];
}

- (void) moviePlayBackDidFinish:(NSNotification*)notification {
    MPMoviePlayerController *player = [notification object];
    player.currentPlaybackTime = 0.1;
    [player stop];
    [player play];
    [player pause];
}

有什么想法吗？

tyvm 基思:)

Answer 1

单击快进或快退按钮时，播放器加载状态未知。您需要处理 MPMoviePlayerLoadStateDidChangeNotification 并重新加载视频路径并再次准备播放。

[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(playerLoadStateChanged:)
                                             name:MPMoviePlayerLoadStateDidChangeNotification
                                           object:nil];

- (void)playerLoadStateChanged:(NSNotification *)notification {

    MPMovieLoadState loadState = _videoPlayer.loadState;

    if(loadState == MPMovieLoadStateUnknown) {
        _videoPlayer.contentURL = [NSURL fileURLWithPath:self.path]
        [_videoPlayer prepareToPlay];
    }
}