ios图片叠加（水印）

iOS开发中，给图片叠加水印，本质上就是对图片进行叠加操作，代码如下：

// 图片叠加

- (UIImage *)addlogoImage:(UIImage *)resizedImage {

   UIGraphicsBeginImageContext(resizedImage.size);

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

 

   UIImage *maskImage = [UIImageimageNamed:@"new.png"];

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

   UIImage *resultingImage = UIGraphicsGetImageFromCurrentImageContext();

   UIGraphicsEndImageContext();

  return resultingImage;

}

效果图如下，前三条记录的图片上叠加了“最新”的图片。