想要给图片加水印其实很简单.只需要如下代码便可轻松搞定。

---

/**iOS图片加水印

@param useImage 需要加水印的图片

@param maskImage 水印logo图

@returns 加好水印的图片

*/

- (UIImage *)addImage:(UIImage *)useImage addMsakImage:(UIImage *)maskImage maskRect:(CGRect)rect{

UIGraphicsBeginImageContext(useImage.size);

[useImage drawInRect:CGRectMake(0, 0, useImage.size.width, useImage.size.height)];

//四个参数为水印图片的位置

[maskImage drawInRect:rect];

UIImage *resultingImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

return resultingImage;

}