MPMoviePlayerController不'；带iOS 5的iPad1上的t环

我有一部短片，在我的视角背景下循环播放。我使用MPMoviePlayerController播放电影。repeatMode设置为MPMovierPeatModeOne，在iPad2、3和模拟器上都可以正常工作。然而，在iPad1上，电影循环一次，在第二次播放后立即停止。该项目为iOS 5 w/o ARC（从GM测试到5.1.1）

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如何让电影在iPad 1上循环播放？

经过多次尝试，我终于找到了解决这个问题的方法：

在注册更改播放状态通知MPMoviePlayerPlayerBackstateDidChangeNotification后，电影会无休止地循环，在iPad 1上进行第二次播放后不会停止。请记住，这种行为并没有发生在iPad2、3或模拟器上

为通知执行的选择器不能为空。只需要分配一个布尔值之类的。上面的扩展代码是：

- (void)loadVideo {
    // Create the controller
    NSString *urlStr = [[NSBundle mainBundle] pathForResource:@"movieFileName.m4v" ofType:nil];
    NSURL *url = [NSURL fileURLWithPath:urlStr];
    self.videoPlayer = [[MPMoviePlayerController alloc] initWithContentURL:url];

    // Configure the controller
    self.videoPlayer.controlStyle = MPMovieControlStyleNone;
    self.videoPlayer.scalingMode = MPMovieScalingModeFill;
    self.videoPlayer.repeatMode = MPMovieRepeatModeOne;
    self.videoPlayer.view.userInteractionEnabled = NO;
    [self.videoPlayer.view setFrame:self.movieContainer.bounds];

    // Register for notifications
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePlayerNotification:) name:MPMoviePlayerPlaybackStateDidChangeNotification object:videoPlayer];
    self.listeningToMoviePlayerNotifications = YES;

    // Add its view to the hierarchy
    [self.movieContainer addSubview:self.videoPlayer.view];
}

- (void)moviePlayerNotification:(NSDictionary *)userInfo {
    // Do anything here, for example re-assign the listeningToMoviePlayerNotification-BOOL
    self.listeningToMoviePlayerNotifications = YES;
}

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经过多次尝试，我终于找到了解决这个问题的方法：

在注册更改播放状态通知MPMoviePlayerPlayerBackstateDidChangeNotification后，电影会无休止地循环，在iPad 1上进行第二次播放后不会停止。请记住，这种行为并没有发生在iPad2、3或模拟器上

为通知执行的选择器不能为空。只需要分配一个布尔值之类的。上面的扩展代码是：

- (void)loadVideo {
    // Create the controller
    NSString *urlStr = [[NSBundle mainBundle] pathForResource:@"movieFileName.m4v" ofType:nil];
    NSURL *url = [NSURL fileURLWithPath:urlStr];
    self.videoPlayer = [[MPMoviePlayerController alloc] initWithContentURL:url];

    // Configure the controller
    self.videoPlayer.controlStyle = MPMovieControlStyleNone;
    self.videoPlayer.scalingMode = MPMovieScalingModeFill;
    self.videoPlayer.repeatMode = MPMovieRepeatModeOne;
    self.videoPlayer.view.userInteractionEnabled = NO;
    [self.videoPlayer.view setFrame:self.movieContainer.bounds];

    // Register for notifications
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePlayerNotification:) name:MPMoviePlayerPlaybackStateDidChangeNotification object:videoPlayer];
    self.listeningToMoviePlayerNotifications = YES;

    // Add its view to the hierarchy
    [self.movieContainer addSubview:self.videoPlayer.view];
}

- (void)moviePlayerNotification:(NSDictionary *)userInfo {
    // Do anything here, for example re-assign the listeningToMoviePlayerNotification-BOOL
    self.listeningToMoviePlayerNotifications = YES;
}

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我已经有了答案，但我必须等8个小时才能回答我自己的问题，因为我只有不到10个左右的答案。请耐心点。答案的实质是：你必须听MPMoviePlayerPlayerBackstateDidChangeNotification。我已经有了答案，但我必须等8个小时才能回答我自己的问题，因为我只有不到10个问题。请耐心点。答案的实质是：你必须听MPMoviePlayerPlayerBackstateDidChangeNotification。