在UIImage的Categoty中添加的方法
// 給原圖添加圖檔水印
+ (UIImage *)imageWithOriginImg:(UIImage *)originImg WaterMask:(UIImage *)mask inRect:(CGRect)rect
{
UIGraphicsBeginImageContextWithOptions(originImg.size, NO, 0.0);
//原圖
[originImg drawInRect:CGRectMake(0, 0, originImg.size.width, mask.size.height)];
//水印圖
[mask drawInRect:rect];
UIImage *newImg = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImg;
}
// 給原圖添加文字水印
+ (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( 0, 0, w, h)];
NSDictionary *attr = @{
NSFontAttributeName:[UIFont boldSystemFontOfSize:55.0],
NSForegroundColorAttributeName:[UIColor redColor]
};
[mark drawInRect:CGRectMake(30, 20, 100, 50) withAttributes:attr];
UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
return img;
}