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ios 给图片添加水印

时间:2016-01-27 10:51:10      阅读:239      评论:0      收藏:0      [点我收藏+]
//第一种添加水印方法

-(UIImage *)watermarkImage:(UIImage *)img withName:(NSString *)name
{ NSString* mark = name; int w = img.size.width; int h = img.size.height; UIGraphicsBeginImageContext(img.size); [img drawInRect:CGRectMake(, , w, h)]; NSDictionary *attr = @{ NSFontAttributeName: [UIFont boldSystemFontOfSize:],//设置字体 NSForegroundColorAttributeName : [UIColor redColor] //设置字体颜色 }; [mark drawInRect:CGRectMake(, , , ) withAttributes:attr];//左上角 [mark drawInRect:CGRectMake(w - , , , ) withAttributes:attr]; //右上角 [mark drawInRect:CGRectMake(w - , h - - , , ) withAttributes:attr]; //右下角 [mark drawInRect:CGRectMake(, h - - , , ) withAttributes:attr]; //左下角 UIImage *aimg = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return aimg; }

//第二种 画水印方法
 
- (UIImage *) imageWithWaterMask:(UIImage*)mask inRect:(CGRect)rect
{
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 40000
 if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 4.0)
 {
 UIGraphicsBeginImageContextWithOptions([self size], NO, 0.0); // 0.0 for scale means "scale for device‘s main screen".
 }
#else
 if ([[[UIDevice currentDevice] systemVersion] floatValue] < 4.0)
 {
 UIGraphicsBeginImageContext([self size]);
 }
#endif
 //原图
 [self drawInRect:CGRectMake(0, 0, self.size.width, self.size.height)];
 //水印图
 [mask drawInRect:rect];
 UIImage *newPic = UIGraphicsGetImageFromCurrentImageContext();
 UIGraphicsEndImageContext();
 return newPic;
}
 

ios 给图片添加水印

原文:http://www.cnblogs.com/Wild-orangutans/p/5162326.html

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