我的MoviePlayer对函数没有响应

Question

我正面临着内存泄漏和其他MoviePlayer新初始化的问题，因为我的MoviePlayer没有响应函数，在这些函数中，我在完成按钮上释放播放器。

(void) playMovieAtURL
{

    MPMoviePlayerViewController *mpViewController = [[MPMoviePlayerViewController alloc] initWithContentURL:[NSURL URLWithString:videoURL]];
    mpViewController.view.backgroundColor = [UIColor blackColor];
    [self presentMoviePlayerViewControllerAnimated:mpViewController];

    [mpViewController.view setCenter:self.view.center];

    [[NSNotificationCenter defaultCenter] addObserver:self 
                                             selector:@selector(myMovieFinishedCallback:) 
                                                 name:MPMoviePlayerPlaybackDidFinishNotification 
                                               object:mpViewController]; 

} 


    // When the movie is done,release the controller. (Doesn't come in it.)
-(void)myMovieFinishedCallback:(NSNotification*)aNotification 
{
    MPMoviePlayerController* theMovie=[aNotification object]; 
    [[NSNotificationCenter defaultCenter] removeObserver:self 
                                                    name:MPMoviePlayerPlaybackDidFinishNotification 
                                                  object:theMovie]; 

    // Release the movie instance created in playMovieAtURL
    [theMovie release]; 
}

Answer 1

我不确定这是不是你的情况，但这是文档对MPMoviePlayerPlaybackDidFinishNotification的描述：

如果电影播放器在全屏模式下显示，并且用户点击了完成按钮，则不会发送此通知。在这种情况下，当播放器退出全屏模式时，完成按钮会导致影片播放暂停。如果要在代码中检测此场景，则应监视其他通知，如MPMoviePlayerDidExitFullscreenNotification。

似乎只有在电影停止时才会调用MPMoviePlayerPlaybackDidFinishNotification。如果您使用的是完成按钮，则应改用MPMoviePlayerDidExitFullscreenNotification。

Answer 2

我试图通过传递nil来解决它，现在它返回给我回调，但电影仍然不会上映，我也会尝试你的建议。不管怎样，我的新代码

-(void) playMovieAtURL
{

MPMoviePlayerViewController *mpViewController = [[MPMoviePlayerViewController alloc] initWithContentURL:[NSURL URLWithString:videoURL]];
mpViewController.view.backgroundColor = [UIColor blackColor];
[self presentMoviePlayerViewControllerAnimated:mpViewController];

[mpViewController.view setCenter:self.view.center];

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

} 

// When the movie is done,release the controller. 
-(void)myMovieFinishedCallback:(NSNotification*)aNotification 
{
    MPMoviePlayerController* theMovie=[aNotification object]; 
    [[NSNotificationCenter defaultCenter] removeObserver:self 
        name:MPMoviePlayerPlaybackDidFinishNotification 
        object:nil]; 

    // Release the movie instance created in playMovieAtURL
    [theMovie release]; 
}