UIImage截图失去了它的质量 [英] UIImage screenshot loses its quality

问题描述

我正在合并两张图片然后我通过应用此代码截取屏幕截图：

I am merging two images and then I take a screenshot by applying this code:

UIGraphicsBeginImageContext(size);
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
img_AddText=viewImage;

[dragView removeFromSuperview];
imgV_SelectedImg.image=nil;
imgV_SelectedImg.image=img_AddText;
UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);

问题在于，当最终图像质量下降时，它会模糊。

The problem is that when the final image loses its quality it blurs.

推荐答案

尝试使用UIGraphicsBeginImageContext的withOptions版本

Try using the withOptions version of UIGraphicsBeginImageContext

UIGraphicsBeginImageContextWithOptions(size, NO, 0.0);

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