ios – 声音仅通过MPMoviePlayerController在某些设备上通过耳机播放

@H_139_5@mPMoviePlayerController正在播放视频,音频只能通过耳机播放.

真正的拖累是,这只发生在一些iPad和iPhone上,甚至是同样的模型
运行相同的系统！

我在这里创建了一个简单的失败示例：

http://www.porcaro.org/MPMoviePlayerController/TestMovie.zip

我已经看到它在iPhone 4S,iPhone 4和iPad 2上运行正常并且失败了.

这是最相关的代码.感谢您的任何见解,我也将向Apple提交一个错误：

(void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];


    moviePath = [NSString StringWithFormat:@"%@/intro.m4v",[[NSBundle mainBundle] bundlePath]];
    NSURL *movieURL = [NSURL fileURLWithPath:moviePath];
    theMoviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:movieURL];

    controlStyle = MPMovieControlStyleEmbedded;
    movieView = [self view];
    movieRect = [[self view] frame];
    controlStyle = MPMovieControlStyleFullscreen;

    theMoviePlayer.controlStyle = controlStyle;
    theMoviePlayer.view.userInteractionEnabled = YES;

    if (1) {
        NSLog(@"Created theMoviePlayer: %@.  Playing: %@",theMoviePlayer,moviePath);
    }

    [[NsnotificationCenter defaultCenter] removeObserver:self name:MPMoviePlayerPlayBACkStateDidChangeNotification object:nil];
    [[NsnotificationCenter defaultCenter] addObserver:self
                                          SELEctor:@SELEctor(checkForEndOfMovie:)
                                          name:MPMoviePlayerPlayBACkStateDidChangeNotification
                                          object:theMoviePlayer];

    // this line doesn't fix the problem                                                                                                       
    //[theMoviePlayer prepareToPlay];                                                                                                          
    [[theMoviePlayer view] setFrame:movieRect];
    [movieView addSubview: [theMoviePlayer view]];
    [theMoviePlayer play];
}