用透明背景播放电影

Question

我有一个应用程序，我点击按钮播放电影。我的电影很透明。当我点击按钮时，我的电影正常播放，但问题是它的背景颜色保持白色。我希望电影的背景颜色是透明的。这是我播放电影的代码。

-(IBAction)ClickFunny:(id)sender
{
    NSString *url = [[NSBundle mainBundle]
                     pathForResource:@"Moviename"
                     ofType:@"mov"];
    MPMoviePlayerController *playerController =
    [[MPMoviePlayerController alloc]
     initWithContentURL:[NSURL fileURLWithPath:url]];
    playerController.controlStyle =MPMovieControlStyleNone;
    playerController.scalingMode = MPMovieScalingModeAspectFill;
    playerController.fullscreen = YES;


        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(movieFinishedCallback:) name:MPMoviePlayerPlaybackDidFinishNotification object:playerController];
    playerController.view.frame = CGRectMake(84, 250, 150, 10);
    [self.view addSubview:playerController.view];

    [playerController play];



}
- (void) movieFinishedCallback:(NSNotification*) aNotification {
    MPMoviePlayerController *player = [aNotification object];
    [[NSNotificationCenter defaultCenter]
     removeObserver:self
     name:MPMoviePlayerPlaybackDidFinishNotification
     object:player];
    [player stop];
    [player.view removeFromSuperview];
    [player autorelease];
}

Answer 1

您是否尝试过设置PlayerController的背景颜色？

playerController.view.backgroundColor = [UIColor clearColor];

Answer 2

您无法使用内置iOS逻辑，因为iOS电影播放仅支持24BPP像素。有关使用带Alpha通道的视频的真实解决方案，请参阅playing-movies-with-an-alpha-channel-on-the-ipad。