Question

我用MPMoviePlayerController播放视频。这是代码。

// Getting URL from path
    NSURL *url = [NSURL fileURLWithPath:self.moviePlayingTempPath];



// Initialize the movie player view controller with a video URL string
self.playerVC = [[MPMoviePlayerController alloc] initWithContentURL:url];

// Remove the movie player view controller from the "playback did finish" notification observers
[[NSNotificationCenter defaultCenter] removeObserver:self.playerVC
                                                name:MPMoviePlayerPlaybackDidFinishNotification
                                              object:self.playerVC];

// Register this class as an observer instead
[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(movieFinishedCallback:)
                                             name:MPMoviePlayerPlaybackDidFinishNotification
                                           object:self.playerVC];

[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(moveiPlayBackStateChanged:)
                                             name:MPMoviePlayerPlaybackStateDidChangeNotification
                                           object:self.playerVC];    


[self.playerVC setControlStyle:MPMovieControlStyleEmbedded];

self.playerVC.view.frame = CGRectMake(0, 0, 1024, 648);

[self.view addSubview:self.playerVC.view];

// Start playback
[self.playerVC prepareToPlay];
[self.playerVC play];

它在嵌入模式下工作正常。我在全屏模式下有非常不寻常的行为。当我全屏播放并且可以播放视频没有任何问题。然后我可以单击完成按钮并毫无问题地进入嵌入模式。

全屏显示并单击向前或向后搜索按钮时出现问题。然后玩家停止播放并显示带有加载文本的活动指示器。然后，如果我单击完成按钮，则播放器将永远消失。我无法弄清楚这个确切的问题。实际上我不需要向前和向后寻找按钮。我们可以阻止寻求或如何解决这个问题。

Answer 1

我通过在用户从全屏切换时删除并添加电影播放器来解决此问题。

这是完整的代码

-(void)continuePlayingFile{
NSURL *url = [NSURL fileURLWithPath:self.moviePlayingTempPath];

// Initialize the movie player view controller with a video URL string
self.playerVC = [[MPMoviePlayerController alloc] initWithContentURL:url];

// Remove the movie player view controller from the "playback did finish" notification observers
[[NSNotificationCenter defaultCenter] removeObserver:self.playerVC
                                                name:MPMoviePlayerPlaybackDidFinishNotification
                                              object:self.playerVC];

// Register this class as an observer instead
[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(movieFinishedCallback:)
                                             name:MPMoviePlayerPlaybackDidFinishNotification
                                           object:self.playerVC];

[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(moveiPlayBackStateChanged:)
                                             name:MPMoviePlayerPlaybackStateDidChangeNotification
                                           object:self.playerVC];

[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(willEnterFullScreen:)
                                             name:MPMoviePlayerWillEnterFullscreenNotification
                                           object:self.playerVC];

[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(willExitFullScreen:)
                                             name:MPMoviePlayerWillExitFullscreenNotification
                                           object:self.playerVC];

[self.playerVC setControlStyle:MPMovieControlStyleEmbedded];
self.playerVC.movieSourceType = MPMovieSourceTypeFile;

self.playerVC.view.frame = CGRectMake(0, 0, 1024, 648);

[self.view addSubview:self.playerVC.view];

// Start playback
[self.playerVC prepareToPlay];
[self.playerVC play];
 }





   -(void)willExitFullScreen:(NSNotification *)note{
        self.isMovieGoFullScreen = NO;
        if(self.isUserClickNextButton){
            //This is to handle user click on next/previous button and then click done button.
            self.isUserClickNextButton=NO;
            [self continuePlayingFile];
        }
    }

    -(void)moveiPlayBackStateChanged:(NSNotification*)aNotification{
        if(self.playerVC){
            self.currentPlayerState = self.playerVC.playbackState;
           if(self.currentPlayerState == MPMoviePlaybackStateStopped){
                self.isUserClickNextButton =YES;
            }
        }
    }

Answer 2

请注意，添加观察者时，object参数应为playerVC.moviePlayer，而不是playerVC。

moviePlayer（类MPMoviePlayerController）是发送通知的人。

所以改变这个：

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(movieFinishedCallback:) name:MPMoviePlayerPlaybackDidFinishNotification object:videoPlayerVC];

到此：

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(movieFinishedCallback:) name:MPMoviePlayerPlaybackDidFinishNotification object:videoPlayerVC.moviePlayer];

单击完成按钮时MPMoviePlayer消失

2 个答案: