iOS_UIImage_给图片添加水印

github地址: https://github.com/mancongiOS/UIImage.git

UIImage的Category

UIImage+ImageWaterPrint.h

#import <UIKit/UIKit.h>
 
@interface UIImage (ImageWaterPrint)
 
- (UIImage *)imageWater:(UIImage *)imageLogo waterString:(NSString *)waterString;
 
@end

UIImage+ImageWaterPrint.m

#import "UIImage+ImageWaterPrint.h"
 
@implementation UIImage (ImageWaterPrint)
 
- (UIImage *)imageWater:(UIImage *)imageLogo waterString:(NSString *)waterString {
 
    UIGraphicsBeginImageContext(self.size);
 
    // 原始图片渲染
    [self drawInRect:CGRectMake(, , self.size.width, self.size.height)];
 
    CGFloat waterX = self.size.width - ;
    CGFloat waterY = self.size.height - ;
    CGFloat waterW = ;
    CGFloat waterH = ;
 
    // logo 渲染
    [imageLogo drawInRect:CGRectMake(waterX, waterY, waterW, waterH)];
 
    // 渲染文字
    NSMutableParagraphStyle * paragraphStyle = [[NSMutableParagraphStyle defaultParagraphStyle] mutableCopy];
 
    paragraphStyle.lineBreakMode = NSLineBreakByCharWrapping;
 
    NSDictionary * dic = @{
                           NSFontAttributeName : [UIFont systemFontOfSize:],
                           NSParagraphStyleAttributeName : paragraphStyle,
                           NSForegroundColorAttributeName : [UIColor redColor]
                           };
 
    [waterString drawInRect:CGRectMake(, , , ) withAttributes:dic];
 
    UIGraphicsEndPDFContext();
 
    // UIImage
    UIImage * imageNew = UIGraphicsGetImageFromCurrentImageContext();
 
    return imageNew;
}
 
@end