ios - MPMoviePlayerViewController 挂在加载屏幕上

Question

我有在我的应用程序中记录屏幕的代码，然后我希望能够回放它。我已经用倒带，播放和快进按钮进入黑色加载屏幕，但它在加载时挂起，没有播放任何内容。

此代码播放剪辑：

-(IBAction)playMovie:(id)sender
{

MPMoviePlayerViewController *movieViewController = [[MPMoviePlayerViewController alloc] initWithContentURL:locationOfVideoURL];
movieViewController.moviePlayer.movieSourceType = MPMovieSourceTypeFile;
[self presentMoviePlayerViewControllerAnimated:movieViewController]; 

}

我相信这个问题与 locationOfVideoURL 变量有关。我能够打印它，它似乎应该工作。

这里打印出来：

file://localhost/Users/myusername/Library/Application%20Support/iPhone%20Simulator/5.1/Applications/[遗漏，个人信息]/Documents/Videoclip.mp4

有任何想法吗？任何帮助将不胜感激！谢谢你

编辑：视频剪辑的位置：

      NSString *outputPath = [[NSString alloc] initWithFormat:@"%@/%@",         [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0], @"Videoclip.mp4"];

      NSURL *outputURL = [[NSURL alloc] initFileURLWithPath:outputPath];
      NSLog(@"Completed recording, file is stored at:  %@", outputURL);