升级到iOS 5后，MPMoviePlayerController不起作用 [英] MPMoviePlayerController doesn't work after upgrading to iOS 5

问题描述

此代码在iPad 4.3模拟器上完美运行：

This code works perfectly on iPad 4.3 Simulator:

NSString *source = [mediaObject objectForKey:@"source"];
NSString *videoPath = [NSString stringWithFormat:@"%@/%@", path, source];
NSURL *videoUrl = [NSURL fileURLWithPath:videoPath];

MPMoviePlayerController *videoPlayer = [[MPMoviePlayerController alloc] initWithContentURL:videoUrl];
videoPlayer.shouldAutoplay = NO;

videoPlayer.view.frame = CGRectMake(xPos, yPos, width, height);

[backgroundImageView addSubview:videoPlayer.view];

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(videoPlaybackStateDidChange:) name:MPMoviePlayerPlaybackStateDidChangeNotification object:videoPlayer];

但它在iPad 5模拟器上不起作用。我得到一个没有电影和播放控件的黑框。

but it doesn't work on iPad 5 Simulator. I get a black frame with no movie nor playback controls.

我读了关于MPMoviePlayerController的Apple更新日志，但我没有发现任何关于这个问题的内容。你能帮助我吗？

I read the Apple changelog about MPMoviePlayerController, but I didn't found anything about this problem. Can you help me?

推荐答案

我用这种方式解决了问题：在我的头文件中我写道：

I solved the problem in this way: in my header file I wrote:

MPMoviePlayerController *moviePlayer;

使用此属性：

@property(nonatomic, strong) MPMoviePlayerController *moviePlayer;

以及我初始化moviePlayer的方法：

and in the method in which I init the moviePlayer:

MPMoviePlayerController *player = [[MPMoviePlayerController alloc] initWithContentURL:movieUrl];
self.moviePlayer = player;

似乎将玩家分配给某个属性会保存该玩家。但不要问我为什么......

It seems that assigning the player to a property "saves" the player. But don't ask me why...

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