操纵手势后从UIImageView保存图像
问题描述：
我试图通过移动，捏合和旋转手势来保存图像.
I'm trying to save the image after manipulating it with move, pinch and rotate gestoures.
无论尝试什么，我得到的都是真实的图像，
All I get is the real image no matter what I tried,
我尝试在UIView容器和UIIMageView上使用UIGraphicsBeginImageContextWithOptions，但没有成功.
I tried with UIGraphicsBeginImageContextWithOptions on the UIView container and on the UIIMageView without success.
希望有人可以对此提供帮助.
Hope someone can help on this one.
谢谢
留住
答
您可以尝试以下操作:
UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0.0);
CGContextConcatCTM(UIGraphicsGetCurrentContext(), imageView.transform);
[imageView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *screenshot = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
这是假设您的imageView通过对其应用的CGAffineTransform进行了转换.
This is assuming your imageView is transformed by means of a CGAffineTransform applied to it.