原文地址：http://yangchao0033.github.io/blog/2016/01/01/mpmovieplayerviewcontrollerbo-fang-jie-shu-hou-zi-dong-xiao-shi-de-jie-jue-fang-an/

你可以使用这段代码来阻止控制器播放在播放结束后自动dismissing（消失），并且捕捉到用户点击完成的按钮事件去自己定义并处理让你的MPMoviePlayerViewController播放器的消失（dismiss）的时机

步骤 1. - 创建并初始化一个MPMoviePlayerViewController（videoPlayer）

MPMoviePlayerViewController *videoPlayer = [[MPMoviePlayerViewController alloc] initWithContentURL:[[NSURL alloc ]initWithString:[aURL];

步骤 2. - 移除videoPlayer默认的通知事件并且加入自己的通知事件。

[[NSNotificationCenter defaultCenter] removeObserver:videoPlayer
name:MPMoviePlayerPlaybackDidFinishNotification object:videoPlayer.moviePlayer];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(videoFinished:) name:MPMoviePlayerPlaybackDidFinishNotification object:videoPlayer.moviePlayer];

步骤 3. - 手动显示你的videoPlayer控制器

[self presentMoviePlayerViewControllerAnimated:videoPlayer];

步骤 4. - 添加 videoFinish: 方法处理通知事件

-(void)videoFinished:(NSNotification*)aNotification{
    int value = [[aNotification.userInfo valueForKey:MPMoviePlayerPlaybackDidFinishReasonUserInfoKey] intValue];
    if (value == MPMovieFinishReasonUserExited) {
        [self dismissMoviePlayerViewControllerAnimated];
    }
}

参考:http://stackoverflow.com/a/19596598