ios图片叠加（水印）

// 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。