MPMoviePlayerController在3.1.2中取消后播放

Question

我在3.1.2中遇到了MPMoviePlayerController的问题.

如果我在播放器仍在加载时取消播放器,播放器将关闭.但是,视频会在后台播放片刻.阻止它的唯一方法是播放另一个视频或关闭应用程序.这似乎在3.2+中工作正常.

这是我正在做的事情:

- (void)loadMoviePlayer
{
    // Register to receive a notification when the movie has finished playing. 
    [[NSNotificationCenter defaultCenter] addObserver:self 
                                             selector:@selector(moviePlayBackDidFinish:) 
                                                 name:MPMoviePlayerPlaybackDidFinishNotification 
                                               object:nil];

    if ([NSClassFromString(@"MPMoviePlayerController") instancesRespondToSelector:@selector(view)])
    {

#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 30200
        // running iOS 3.2 or better
        MPMoviePlayerViewController *moviePlayer = [[MPMoviePlayerViewController alloc] initWithContentURL:[NSURL URLWithString:@"http://www.mysite.com/myvideo.m3u8"]];
        [moviePlayer.view setBackgroundColor:[UIColor blackColor]];
        [moviePlayer.moviePlayer setControlStyle:MPMovieControlStyleFullscreen];
        //      [moviePlayer.moviePlayer setControlStyle:MPMovieControlStyleNone];
        [self presentMoviePlayerViewControllerAnimated:moviePlayer];
        [moviePlayer.moviePlayer prepareToPlay];    
        [moviePlayer.moviePlayer play]; 
#endif
    }
    else 
    {
        MPMoviePlayerController *mMPPlayer = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL URLWithString:@"http://www.mysite.com/myvideo.m3u8"]];
        mMPPlayer.scalingMode=MPMovieScalingModeFill;
        mMPPlayer.backgroundColor=[UIColor blackColor];
        [mMPPlayer play];
    } 

}

- (void) moviePlayBackDidFinish:(NSNotification*)notification 
{    
    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleBlackOpaque];
    [[UIApplication sharedApplication] setStatusBarHidden:NO];

    // Remove observer
    [[NSNotificationCenter  defaultCenter] 
     removeObserver:self
     name:MPMoviePlayerPlaybackDidFinishNotification 
     object:nil];

    [self dismissModalViewControllerAnimated:YES];
}

我今天早上添加了moviePlayBackDidFinish.当我点击取消时它被调用,但dismissModalViewControllerAnimated似乎什么也没做.我也尝试过removeFromSuperView,但我的播放器不会响应.

那么,我怎样才能确保玩家在点击"取消"后不玩？

提前致谢.

Answer 1

您可能在MPMoviePlayerController中遇到了一个旧错误.在这些日子里,我们实际上必须在播放适当的内容后播放几乎空的(黑色,静音)M4V,以确保玩家在某些阶段停止时不会尝试在后台继续播放.该错误表现在可听见的声音中,但没有中止/停止视频的图片.

然而,在停止时还有一些值得尝试的事情(假设你的MPMoviePlayerController实例叫做moviePlayer);

• 将当前播放位置设置为完整的电影持续时间 moviePlayer.currentPlaybackTime = moviePlayer.duration;
• 在通知处理程序中发送另一个停止 [moviePlayer stop];