iOS:撷取萤幕撷取画面以呈现影片ipad [英] iOS: taking screenshot presenting video ipad

问题描述

我正在尝试截取播放视频的屏幕截图，但屏幕截图始终显示为空白.这是我的代码:

I'm trying to take screenshot playing video but the screenshot always is showing blank. This is my code:

UIGraphicsBeginImageContext(self.view.bounds.size);
    [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    NSData *data = UIImageJPEGRepresentation(viewImage, 1.0);
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsPath = [paths objectAtIndex:0];
    NSString *filePath = [documentsPath stringByAppendingPathComponent:@"image.jpg"];
    [data writeToFile:filePath atomically:YES];

我正在使用AVPlayer/AVPlayerLayer播放视频.

I'm using AVPlayer/AVPlayerLayer to play the video.

你们中的任何人都知道为什么会这样吗?还是我需要对视频做一些特殊的事情才能拍摄屏幕截图?

Any of you knows why this happening? or if I need to do something special with video to be able to take the screenshot?

非常感谢您的帮助.

推荐答案

我找到了解决问题的方法:

I found a solution to my problem:

AVAssetImageGenerator *imageGenerator = [AVAssetImageGenerator assetImageGeneratorWithAsset:[self.player.currentItem asset]];
    CGImageRef ref = [imageGenerator copyCGImageAtTime:self.player.currentItem.currentTime actualTime:nil error:nil];
    UIImage *viewImage = [UIImage imageWithCGImage:ref];
    CGImageRelease(ref);
    NSData *data = UIImageJPEGRepresentation(viewImage, 1.0);
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsPath = [paths objectAtIndex:0];
    NSString *filePath = [documentsPath stringByAppendingPathComponent:@"image.jpg"];
    [data writeToFile:filePath atomically:YES];

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