Question

通过presentMoviePlayerViewControllerAnimated:以模态方式呈现的MPMoviePlayerViewController会在内容播放完毕时自动解散。

我试图禁用此功能，因为之后我想播放其他内容。但是，即使我使用[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(movieFinishedCallback:) name:MPMoviePlayerPlaybackDidFinishNotification object:playerVC.moviePlayer];注册到NSNotificationCenter并设置了一些其他内容，它仍然会解散。

如何阻止MPMoviePlayerViewController自动解除其自身？

更新

作为澄清，这个问题仅关于删除自动解雇而不是处理禁用的“完成”按钮。所选答案反映出来。这是设计，因为我们假设开发人员添加他们自己的解雇MPMoviePlayerViewController的方法。但是， @bickster 的回答也会处理“完成”按钮。

Answer 1

感谢this blog article我发现MPMoviePlayerViewController会在创建时自动将自身注册到NSNotificationCenter。您必须先删除此注册，它将自动停止自行解除。

// Initialize the movie player view controller with a video URL string
MPMoviePlayerViewController *playerVC = [[[MPMoviePlayerViewController alloc] initWithContentURL:[NSURL URLWithString:aVideoUrl]] autorelease];
// Remove the movie player view controller from the "playback did finish" notification observers
[[NSNotificationCenter defaultCenter] removeObserver:playerVC  name:MPMoviePlayerPlaybackDidFinishNotification object:playerVC.moviePlayer];

Answer 2

您可以使用此代码阻止viewcontroller在用户单击“完成”按钮时自动关闭并捕获事件，以便您可以自行关闭视图控件。

步骤1. - 分配MPMoviePlayerViewController

videoPlayer = [[MPMoviePlayerViewController alloc] initWithContentURL:[[NSURL alloc ]initWithString:[aURL];

步骤2. - 删除默认的MPMoviePlayerPlaybackDidFinishNotification观察者并添加您自己的

[[NSNotificationCenter defaultCenter] removeObserver:videoPlayer
name:MPMoviePlayerPlaybackDidFinishNotification object:videoPlayer.moviePlayer];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(videoFinished:) name:MPMoviePlayerPlaybackDidFinishNotification object:videoPlayer.moviePlayer];

步骤3. - 呈现viewcontroler

[self presentMoviePlayerViewControllerAnimated:videoPlayer];

步骤4. - 添加videoFinish：方法

-(void)videoFinished:(NSNotification*)aNotification{
    int value = [[aNotification.userInfo valueForKey:MPMoviePlayerPlaybackDidFinishReasonUserInfoKey] intValue];
    if (value == MPMovieFinishReasonUserExited) {
        [self dismissMoviePlayerViewControllerAnimated];
    }
}

Answer 3

你可以尝试这样的事情。

当mpmovieplayercontroller完成播放视频并且您在方法中收到通知时 movieFinishedCallback：实现

       [playerVC.movieplayer setContentURL:// set the url of the file you want to play here];

       [playerVC.moviePlayer play];

希望这有帮助

Answer 4

如果我从MPMoviePlayerPlaybackDidFinishNotification删除NSNotificationCenter，“完成”按钮不再有效，我将重复模式更改为MPMovieRepeatModeOne。然后，除了视频重复之外，一切正常。

MPMoviePlayerViewController *playerVC = [[[MPMoviePlayerViewController alloc] initWithContentURL:[NSURL URLWithString:aVideoUrl]] autorelease];
[playerVC.moviePlayer setRepeatMode:MPMovieRepeatModeOne];

如何在moviePlaybackDidFinish上停止MPMoviePlayerViewController的自动关闭？

4 个答案: