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##使用UIImage+ATWatermark轻松为图片增加水印

###功能:

  • 可以给UIImage类型的图片添加文字和图片两种类型的水印
  • 可以选择添加水印的位置(顶部居中、底部居中、左上、右上、左下、右下)
  • 如果自带的这些位置不能满足需求,还可以调整水印的偏移,从而使水印达到任何位置

###使用:

  • 添加图片类水印
    image -- 要添加图片的水印
    attrString -- 要作为水印的富文本
    position -- 水印的位置,为枚举类型
    offset -- 水印的偏移,在默认位置的基础上调整
+ (instancetype)imageWithUIImage:(UIImage *)image watermarkOfText:(NSAttributedString *)attrString;

+ (instancetype)imageWithUIImage:(UIImage *)image watermarkOfText:(NSAttributedString *)attrString position:(ATWatermarkPositon)position;

+ (instancetype)imageWithUIImage:(UIImage *)image watermarkOfText:(NSAttributedString *)attrString position:(ATWatermarkPositon)position offset:(CGPoint)offset;

// 对应的类方法
- (instancetype)addWatermarkWithImage:(UIImage *)image;
- (instancetype)addWatermarkWithImage:(UIImage *)waterMaskImage position:(ATWatermarkPositon) postion;
- (instancetype)addWatermarkWithImage:(UIImage *)waterMaskImage position:(ATWatermarkPositon) postion offset:(CGPoint)offset;
  • 添加文字类水印
    image -- 要添加图片的水印
    waterMaskImage -- 要作为水印的富文本
    position -- 水印的位置,为枚举类型
    offset -- 水印的偏移,在默认位置的基础上调整
+ (instancetype)imageWithUIImage:(UIImage *)image watermarkOfImage:(UIImage *)waterMaskImage;

+ (instancetype)imageWithUIImage:(UIImage *)image watermarkOfImage:(UIImage *)waterMaskImage position:(ATWatermarkPositon) postion;

+ (instancetype)imageWithUIImage:(UIImage *)image watermarkOfImage:(UIImage *)waterMaskImage position:(ATWatermarkPositon) postion offset:(CGPoint)offset;

// 对应的类方法
- (instancetype)addWatermarkWithText:(NSAttributedString *)attrString;
- (instancetype)addWatermarkWithText:(NSAttributedString *)attrString position:(ATWatermarkPositon)position;
- (instancetype)addWatermarkWithText:(NSAttributedString *)attrString position:(ATWatermarkPositon)position offset:(CGPoint)offset;

###注意:

  1. 作为水印的图片都是按照原图大小绘制的
  2. 富文本作为水印暂时只能使用所有文字的attribute属性为一致的情况

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