Iphone MPMoviePlayerController拍摄屏幕快照但仅显示黑屏

我在播放MPMoviePlayerController时拍摄了屏幕截图。完全保存了屏幕截图，但图像仅为黑色。我使用以下代码

UIGraphicsBeginImageContext(self.moviePlayerController.view.frame.size);
[self.moviePlayerController.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);

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您可以尝试使用MPMoviePlayerController的

thumbnailImageAtTime

方法

UIImage *aThumbnail = [player thumbnailImageAtTime:timeCode timeOption:MPMovieTimeOptionExact];
//timeCode is a time within the video length, for example: 5 seconds.

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最后我解决了这个问题…我正在使用这个代码…完美地工作…感谢所有

- (void)captureScreenShot
{
    CGImageRef originalImage = UIGetScreenImage();
    CGImageRef videoImage = CGImageCreateWithImageInRect(originalImage, CGRectMake(0, 66, 320, 230));            
    UIImage *snapShotImage = [UIImage imageWithCGImage:videoImage];
    UIImageWriteToSavedPhotosAlbum(snapShotImage, nil, nil, nil);
    CGImageRelease(originalImage);                
    CGImageRelease(videoImage);  
}

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谢谢…但是什么都没有发生UIGraphicsBeginImageContext（self.moviePlayerController.view.frame.size）；[self.moviePlayerController.view.layer renderContext:UIGraphicsGetCurrentContext（）]；UIGraphicsSendImageContext（）；UIImage*aThumbnail=[self.moviePlayerController缩略图图像时间：0时间选项：MPMovieTimeOptionExact]；UIImageWriteToSavedPhotosAlbum（无，无，无，无）；我用这条线。