我在 iOS 7 中面临 MPMoviePlayerController 的问题。我进入全屏，然后单击(只需轻按一下)向前搜索按钮 (>>|)，视频播放结束并显示黑屏并显示文本 header 上的“正在加载”。

我为“MPMoviePlayerPlaybackStateDidChangeNotification”注册了通知。

**[[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(moviePlayerPlaybackStateDidChange:)
                                                 name:MPMoviePlayerPlaybackStateDidChangeNotification
                                               object:self.player];**

单击向前搜索按钮不会触发它。

同样关于“MPMoviePlayerPlaybackDidFinishNotification”的注册

**[[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(moviePlayerPlaybackDidFinish:)
                                                 name:MPMoviePlayerPlaybackDidFinishNotification
                                               object:nil];**

我在单击向前搜索按钮时触发了“MPMovieFinishReasonPlaybackEnded”事件。 任何人都知道为什么？这是 apple 的 bug 吗？

我需要停止这种在单击时显示黑屏的行为，或者只禁用单击向前搜索按钮，这样就什么也不会发生。

有人知道如何实现吗？

最佳答案

我通过完全删除 MPMoviePlayer 对象、将其设置为 nil、将其从其 super View 中删除并使用原始视频 Url 重新添加来解决此问题。代码如下:

- (void)addPlayerForUrl:(NSURL *)url {
  self.player = [[MPMoviePlayerController alloc] initWithContentURL:url];
  self.player.view.frame = self.videoView.bounds;
  self.player.view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
  self.player.controlStyle = MPMovieControlStyleDefault;
  [self.videoView insertSubview:self.player.view atIndex:0];

  [[NSNotificationCenter defaultCenter] addObserver:self
                                           selector:@selector(moviePlayerLoadStateDidChangedNotification:)
                                               name:MPMoviePlayerReadyForDisplayDidChangeNotification
                                             object:self.player];

  [[NSNotificationCenter defaultCenter] addObserver:self
                                           selector:@selector(moviePlayerPlaybackStateDidChangeNotification:)
                                               name:MPMoviePlayerPlaybackStateDidChangeNotification
                                             object:self.player];
}


#pragma mark - Notifications

- (void)moviePlayerLoadStateDidChangedNotification:(NSNotification *)notification {
  self.isVideoPreloaded = YES;
  self.videoPlayButton.hidden = YES;
  self.photoImageView.hidden = YES;
  self.videoLoadingImageView.hidden = YES;
}
- (void)moviePlayerPlaybackStateDidChangeNotification:(NSNotification *)notification {
      NSURL *url = self.player.contentURL;
      switch (self.player.playbackState) {
        case MPMoviePlaybackStateSeekingBackward:
        case MPMoviePlaybackStateSeekingForward:
          break;
        case MPMoviePlaybackStatePlaying:
          self.videoPlayButton.hidden = YES;

          if (!self.isVideoPreloaded) {
            self.videoLoadingImageView.hidden = NO;
            [self.videoLoadingImageView startAnimating];
          } else {
            self.videoLoadingImageView.hidden = YES;
          }
          break;
        case MPMoviePlaybackStatePaused:
        case MPMoviePlaybackStateStopped:
          self.videoPlayButton.hidden = NO;
          self.videoLoadingImageView.hidden = YES;
          [self.player endSeeking];
          [self.player.view removeFromSuperview];
          [self.player setFullscreen:NO];
          self.player = nil;
          [self addPlayerForUrl:url];
          break;
        default:
          break;
      }
    }

请注意我是如何保留 NSURL 的，就在 moviePlayerPlaybackStateDidChangeNotification 中的 switch 语句之前。这样，我就可以重新初始化并重新添加 MPMoviePlayer 对象。

顺便说一句，如果您想知道的话，我的 mpmovieplayer 在 tableviewCell 上。希望这对您有所帮助，如果您有任何疑问，请告诉我。祝你好运!

关于iOS 7 MPMoviePlayerController 向前搜索按钮将视频带到结尾并显示黑屏，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/19570838/