UILabel 給關鍵字模糊匹配並高亮

有些狀況就是須要查找某個字符串並高亮，但有些需求就是須要全局模糊查找，找到符合的字符串並高亮。造了個小輪子

###效果圖

#pragma mark -- 設置在一個文本中全部特殊字符的特殊顏色
+ (NSMutableAttributedString *)setAllText:(NSString *)allStr andSpcifiStr:(NSString *)keyWords withColor:(UIColor *)color specifiStrFont:(UIFont *)font{
    NSMutableAttributedString *mutableAttributedStr = [[NSMutableAttributedString alloc] initWithString:allStr];
    if (color == nil) {
        color = [UIColor redColor];
    }
    if (font == nil) {
        font = [UIFont systemFontOfSize:17];
    }
    
    
    for (NSInteger j=0; j<=keyWords.length-1; j++) {
        
        NSRange searchRange = NSMakeRange(0, [allStr length]);
        NSRange range;
        NSString *singleStr = [keyWords substringWithRange:NSMakeRange(j, 1)];
        while
            ((range = [allStr rangeOfString:singleStr options:NSLiteralSearch range:searchRange]).location != NSNotFound) {
                //改變屢次搜索時searchRange的位置
                searchRange = NSMakeRange(NSMaxRange(range), [allStr length] - NSMaxRange(range));
                //設置富文本
                [mutableAttributedStr addAttribute:NSForegroundColorAttributeName value:color range:range];
                [mutableAttributedStr addAttribute:NSFontAttributeName value:font range:range];
            }
    }
    return mutableAttributedStr;
}

源碼地址