ios - 视频播放后无法返回 View

Question

我正在运行以下代码。视频播放得很好，但播放完毕后，它只是变成黑屏，我原来的 View 再也没有回来。当我点击黑屏时，我只看到消息“正在加载......”有人可以解释一下我做错了什么吗？谢谢

- (IBAction)video:(UIBarButtonItem *)sender
{
    {
        NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle]
                                             pathForResource:@"IMG_0973" ofType:@"MOV"]];
        moviePlayer=[[MPMoviePlayerController alloc] initWithContentURL:url];


        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePlayBackDidFinish:) name:MPMoviePlayerPlaybackDidFinishNotification object:moviePlayer];
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePlayBackDonePressed:) name:MPMoviePlayerDidExitFullscreenNotification object:moviePlayer];



        moviePlayer.controlStyle=MPMovieControlStyleDefault;
        //moviePlayer.shouldAutoplay=NO;
        [moviePlayer play];
        [self.view addSubview:moviePlayer.view];
        [moviePlayer setFullscreen:YES animated:YES];

    }

}

- (void) moviePlayBackDonePressed:(NSNotification*)notification
{
    [moviePlayer stop];
    [[NSNotificationCenter defaultCenter] removeObserver:self name:MPMoviePlayerDidExitFullscreenNotification object:moviePlayer];


    if ([moviePlayer respondsToSelector:@selector(setFullscreen:animated:)])
    {
        [moviePlayer.view removeFromSuperview];
    }

    moviePlayer=nil;
}

- (void) moviePlayBackDidFinish:(NSNotification*)notification
{
    [moviePlayer stop];
    [[NSNotificationCenter defaultCenter] removeObserver:self name:MPMoviePlayerPlaybackDidFinishNotification object:moviePlayer];

    if ([moviePlayer respondsToSelector:@selector(setFullscreen:animated:)])
    {
        [moviePlayer.view removeFromSuperview];
    }
}

Answer 1

添加此通知方法

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePreloadDidFinish:) name:MPMoviePlayerLoadStateDidChangeNotification
                                               object:player];

此方法在您的电影加载后调用，并在该方法中添加您的 moviePlayer View 。

-(void)moviePreloadDidFinish:(NSNotification*)notification
{

   moviePlayer.controlStyle=MPMovieControlStyleDefault;
   [self.view addSubview:moviePlayer.view];
   [moviePlayer play];
   [moviePlayer setFullscreen:YES animated:YES];

}