播放错误时关闭 MPMoviePlayerViewController

我的 MPMovies PlayerViewController 遇到问题：如果控制器在指定的 URL 处找不到电影，它会显示白屏，并且我无法使其关闭。

这就是我启动电影播放器​​的方式：

- (void) playVideo:(NSString*)path 
{
 NSURL* url = [NSURL URLWithString:path];

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

 double osversion = [[[UIDevice currentDevice] systemVersion] doubleValue];
 if (osversion >= 3.2) 
 {
  mplayerVC = [[MPMoviePlayerViewController alloc] initWithContentURL:url];

  if (mplayerVC)
  {
   mplayerVC.moviePlayer.movieSourceType = MPMovieSourceTypeFile;
   [mplayerVC.moviePlayer play];
   mplayerVC.moviePlayer.shouldAutoplay = TRUE;

  [self presentMoviePlayerViewControllerAnimated:mplayerVC];

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

 }  
}

这就是 moviePlayBackDidFinish: 方法的样子

    - (void) moviePlayBackDidFinish:(NSNotification*)notification 
    {
     [[NSNotificationCenter  defaultCenter] removeObserver:self name:MPMoviePlayerPlaybackDidFinishNotification object:nil];  

     NSError* error = [[notification userInfo] valueForKey:@"error"];
     if (error != nil)
     {
      // Movie ended with an error
      DLog(@"error=%@", error);
     }
     else 
     {
      // Movie ended successfully
     }

     [self dismissMoviePlayerViewControllerAnimated];
     SAFE_DEL(mplayerVC);
    }

仅当 URL 指向错误时才会出现白屏

没关系，伙计们，我已经弄清楚了。

显然在 moviePlaybackDidFinish 方法中你必须调用

[player stop];

在解雇控制器之前。

上面，player是这样获得的MPMoviePlayerController对象：

MPMoviePlayerController *player = [notification object];