iphone - 按下主页按钮时 MPMoviePlayerViewController 消失

Question

我正在像这样创建我的 MPMoviePlayerViewController:

MPMoviePlayerViewController *playerView = [[MPMoviePlayerViewController alloc] initWithContentURL:videoURL];
[self presentMoviePlayerViewControllerAnimated:playerView];

它工作正常，直到我按下主页按钮:这样，在我重新打开应用程序后，播放器 View Controller 消失了，我看到了我最初调用它的 View Controller 。如果我双击主屏幕按钮打开多任务面板，播放器不会消失，只是暂停(应该如此)。

那么我该如何防止这种情况发生(关闭并重新打开应用程序应该让我重新播​​放视频)？

更新:我注意到如果我在“正在加载...”文本出现时关闭并重新打开应用程序，播放器不会消失。在这种情况下，返回到应用程序可以让播放器继续加载视频以最终开始播放。然而在那之后关闭应用程序(无论是在播放视频还是暂停时)不可避免地会杀死播放器 View Controller ......

Answer 1

像这样尝试:

 MPMoviePlayerViewController *playerView = [[MPMoviePlayerViewController alloc] initWithContentURL:videoURL];
    playerView.view.frame = self.view.frame;
    [self presentMoviePlayerViewControllerAnimated:playerView];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(MPMoviePlayerDidExitFullscreen:) name:MPMoviePlayerDidExitFullscreenNotification object:nil];
    [[NSNotificationCenter defaultCenter]
     addObserver:self
     selector:@selector(playbackStateChanged:)
     name:MPMoviePlayerPlaybackStateDidChangeNotification
     object:moviePlayerController];

     [playerView.moviePlayer play];

然后添加这两个方法:

- (void) movieFinishedCallback:(NSNotification*) aNotification 
{
    moviePlayerController = [aNotification object];
    [moviePlayerController.moviePlayer stop];
    [[NSNotificationCenter defaultCenter] 
     removeObserver:self name:MPMoviePlayerPlaybackDidFinishNotification
     object:moviePlayerController];
    [moviePlayerController autorelease];
    NSLog(@"stopped?");
}

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

    [moviePlayerController.moviePlayer stop];
    MPMoviePlayerController *player = [notification object];
    [[NSNotificationCenter defaultCenter] 
     removeObserver:self name:MPMoviePlayerPlaybackDidFinishNotification
     object:player];
    [moviePlayerController dismissMoviePlayerViewControllerAnimated];
}