ios - MPMoviePlayerController:停止 MPMoviePlayerController 时没有声音

Question

我正在使用 MPMoviePlayerController 在我的应用程序中播放一个视频。下面是我播放视频的代码。

    **NSURL *url=[[NSURL alloc] initFileURLWithPath:urlPath];        
    if(moviePlayer)
    {
        [moviePlayer.view removeFromSuperview];
        moviePlayer = nil;
    }

    moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:url];
    moviePlayer.repeatMode = MPMovieRepeatModeOne;
    moviePlayer.currentPlaybackTime = 0.0;
    moviePlayer.view.frame = _viewMoviePlayer.frame;
    moviePlayer.controlStyle    =       MPMovieControlStyleNone;
    moviePlayer.shouldAutoplay = YES;
    [_viewMoviePlayer addSubview:moviePlayer.view];
    [moviePlayer prepareToPlay];
    [moviePlayer play];
    [self.view sendSubviewToBack:_viewMoviePlayer];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePlayBackDidFinish:) name:MPMoviePlayerPlaybackDidFinishNotification object:moviePlayer];**

当 viewWillDisappear 调用时，我只是停止 moviePlayer 并将其从 View 中删除。 但是我的默认音乐播放器正在运行但没有声音。当我关闭我的应用程序时，它会。

-(void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    [moviePlayer stop];
    [moviePlayer.view removeFromSuperview];
    moviePlayer = nil;

    [_viewMoviePlayer removeFromSuperview];
    _viewMoviePlayer = nil;
}

谁能告诉我代码中哪里出了问题？所以我发布了 moviePlayer 然后它会播放默认音乐。 当我检查音乐的当前声音时，它的哦，而且它的表演歌曲正在音乐应用程序中运行。但是没有听到声音。

Answer 1

我遇到了同样的问题。我刚刚创建了一个单独的 Controller 。下面是我的代码:

-(void)playVideo
{
   isPlay = FALSE;
   if([[MPMusicPlayerController systemMusicPlayer] playbackState] == MPMoviePlaybackStatePlaying)
       isPlay = TRUE;

   NSString *urlPath = [[NSBundle mainBundle]
                        pathForResource:@"all"
                        ofType:@"mp4"];


   NSURL *url=[[NSURL alloc] initFileURLWithPath:urlPath];

   if(player)
       [player pause];

   player = nil;

   if(avPlayerLayer)
       [avPlayerLayer removeFromSuperlayer];

   AVPlayerItem *playerItem = [[AVPlayerItem alloc] initWithURL:url];
   player = [[AVPlayer alloc] initWithPlayerItem:playerItem];

   avPlayerLayer = [AVPlayerLayer playerLayerWithPlayer:player];

   avPlayerLayer.frame = self.view.frame;
   [self.view.layer addSublayer:avPlayerLayer];
   [player play];
  }

-(void)removeMoviePlayer
{
   if(isPlay)
       [[MPMusicPlayerController systemMusicPlayer] play];
   NSError *deactivationError = nil;
   BOOL success = [[AVAudioSession sharedInstance] setActive:NO error:&deactivationError];
   if (!success) {
       NSLog(@"%@", [deactivationError localizedDescription]);
   }    
}

希望对您有所帮助...:)