MPMoviePlayerController存在黑色背景 [英] MPMoviePlayerController existed black background

问题描述

我制作iOS应用.

我使用MPMoviePlayerController，但这显示黑色背景.

我认为可以通过此URL解决此问题，但我无法理解使用方式.
MPMoviePlayerController背景色不会变

我的代码是这个.

I make iOS app.

I use MPMoviePlayerController, but this shows black background.

I think this problem can solve by this URL, but I can't understand use way.
MPMoviePlayerController background color won't stick

My code is this.

NSString *path = [[NSBundle mainBundle] pathForResource:@"movie_files" ofType:@"m4v"];
NSURL *videoURL = [NSURL fileURLWithPath:path];

moviePlayer =  [[MPMoviePlayerController alloc]
                initWithContentURL:videoURL];

//setting
moviePlayer.scalingMode =MPMovieScalingModeAspectFit;
moviePlayer.controlStyle=MPMovieControlStyleDefault;
moviePlayer.shouldAutoplay=NO;
[moviePlayer.view setFrame:CGRectMake(20, 20, 280, 200)];    

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

//clearColor
UIView *subV =[[UIView alloc]init];
for(subV in moviePlayer.backgroundView.subviews) {
    subV.backgroundColor = [UIColor clearColor];
}
[moviePlayer.view addSubview:subV];    
[self.view addSubview:moviePlayer.view];
//show white screen

请告诉清楚背景方式.

推荐答案

您需要将其更改为:

moviePlayer.backgroundView.backgroundColor = [UIColor clearColor];
for(UIView *aSubView in moviePlayer.view.subviews) {
    aSubView.backgroundColor = [UIColor clearColor];
}

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