MPMoviePlayerController工作得很好，直到iOS 4.0现在只播放声音，没有视频 [英] MPMoviePlayerController worked fine up to iOS 4.0 now just plays sound, no video

问题描述

以下代码或多或少取自示例MPMoviePlayerController示例代码。在我去年写的一个应用程序中，它曾用于全屏播放视频而没有任何问题。从iOS 4.0开始，后台只有音频。这就像电影播放器​​没有视图或视图在我的应用程序后面。我仍然可以与我的应用互动，甚至开始一个新视频（仅限音频）。

The code below is more or less taken from the example MPMoviePlayerController sample code. In an app I wrote last year, it used to play videos fullscreen without an issue. Since iOS 4.0, there's just audio in the background. It's like the movie player doesn't have a view or the view is behind my app. I can still interact with my app, even 'start' a new video (audio only).

这就像电影播放器​​现在需要一个视图，但我不知道看看在API或示例代码中提供这种方式的任何方式（它看起来似乎是一个或两个版本。

It's like the movie player now needs a view, but I don't see any way of supplying this in the API or the sample code (which does seem to be a version or two behind.

我从URL加载我的视频，如果我将它们输入Safari，它们就可以正常播放。

I load my videos from a URL and if I type these into Safari, they play just fine.

这是相关的代码片段，它的价值是什么：

Here's the relevant code fragments, for what it's worth:

- (void)playMovieUrl:(NSURL*)url
            delegate:(id)delegate
    callbackSelector:(SEL)selector
{
    @try {
        movieFinishedCallbackDelegate = delegate;
        movieFinishedCallbackSelector = selector;
        movieURL = url;
        MPMoviePlayerController* theMovie=[[MPMoviePlayerController alloc] initWithContentURL:url]; 

        [[NSNotificationCenter defaultCenter] addObserver:self 
                                                 selector:@selector(myMovieFinishedCallback:) 
                                                     name:MPMoviePlayerPlaybackDidFinishNotification 
                                                   object:theMovie]; 
        [theMovie play];
    }
    @catch (NSException * e) {
        return;
    }
} 

// When the movie is done,release the controller. 
-(void)myMovieFinishedCallback:(NSNotification*)aNotification 
{
    MPMoviePlayerController* theMovie=[aNotification object]; 
    [[NSNotificationCenter defaultCenter] removeObserver:self 
                                                    name:MPMoviePlayerPlaybackDidFinishNotification 
                                                  object:theMovie];
    [theMovie release];
    [movieURL release];
    [movieFinishedCallbackDelegate performSelector:movieFinishedCallbackSelector];
}

推荐答案

你可能需要展示电影：

[self presentMoviePlayerViewControllerAnimated:theMovie];

并改为：

MPMoviePlayer < b>查看控制器

MPMoviePlayerViewController

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