iOS中对部分字体进行着色

@param content 全部内容

@param search  着色内容

+(NSAttributedString *)content:(NSString *)contentcolorString:(NSString *)search

{

   NSMutableAttributedString *attString = [[NSMutableAttributedStringalloc] initWithString:content];

    [attStringaddAttribute:(NSString*)NSForegroundColorAttributeNamevalue:[UIColor redColor] range:[contentrangeOfString:search]];

    return attString;

}