多個(gè)關(guān)鍵字高亮

項(xiàng)目地址：iOS 關(guān)鍵詞高亮顯示

在做搜索時(shí)，經(jīng)常用到關(guān)鍵字高亮。以下是我的項(xiàng)目用到的關(guān)鍵字高亮。

  1 //關(guān)鍵字?jǐn)?shù)組 關(guān)鍵字顏色

    [lb setAttributedText:text withRegularPattern:[text regularPattern:keyArr] attributes:@{ NSForegroundColorAttributeName : [UIColor redColor]}];

2

/**

 關(guān)鍵字 正則判斷

 */

-(NSString *)regularPattern:(NSArray *)keys{

    NSMutableString *pattern = [[NSMutableString alloc]initWithString:@"(?i)"];

    for (NSString *key in keys) {

        [pattern appendFormat:@"%@|",key];

    }

    return pattern;

}

3

/**

 關(guān)鍵字高亮設(shè)置

 */

- (void)setAttributedText:(NSString *)text

    withRegularExpression:(NSRegularExpression *)expression

               attributes:(NSDictionary *)attributesDict

{

  NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:text];

  [expression enumerateMatchesInString:text

                               options:0

                                 range:NSMakeRange(0, [text length])

                            usingBlock:^(NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop) {

     NSRange matchRange = [result range];

     if (attributesDict) {

       [attributedString addAttributes:attributesDict range:matchRange];

     }

     if ([result resultType] == NSTextCheckingTypeLink) {

       NSURL *url = [result URL];

       [attributedString addAttribute:NSLinkAttributeName value:url range:matchRange];

     }

   }];

  [self setAttributedText:attributedString];

}