项目地址：iOS 关键词高亮显示

在做搜索时，经常用到关键字高亮。以下是我的项目用到的关键字高亮。

1//关键字数组 关键字颜色

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

2

/**

关键字 正则判断

*/

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

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

for (NSString *key in keys) {

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

}

return pattern;

}

3

/**

关键字高亮设置

*/

- (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];

}