在iOS中像在Twitter App中一样检测哈希标签＃，提及标签@，

Grey_Code 发表于 Dev

灰色代码

我需要检测描述中给出的#TagsUILabel并更改文本颜色，[UIColor BlueColor];因为我无法将特定文本颜色更改UILabel为Blue。现在我正在UILabel习惯使用它UITableViewCell。有什么方法可以解决此问题，以通过文本颜色区分#Tags和普通文本？有人可以帮我解决这个问题吗？

Vijay-Apple-Dev.blogspot.com

-(NSMutableAttributedString*)decorateTags:(NSString *)stringWithTags{


    NSError *error = nil;

    //For "Vijay #Apple Dev"
    NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"#(\\w+)" options:0 error:&error];

    //For "Vijay @Apple Dev"
    //NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"@(\\w+)" options:0 error:&error];

    NSArray *matches = [regex matchesInString:stringWithTags options:0 range:NSMakeRange(0, stringWithTags.length)];
    NSMutableAttributedString *attString=[[NSMutableAttributedString alloc] initWithString:stringWithTags];

    NSInteger stringLength=[stringWithTags length];

    for (NSTextCheckingResult *match in matches) {

        NSRange wordRange = [match rangeAtIndex:1];

        NSString* word = [stringWithTags substringWithRange:wordRange];

        //Set Font
        UIFont *font=[UIFont fontWithName:@"Helvetica-Bold" size:15.0f];
        [attString addAttribute:NSFontAttributeName value:font range:NSMakeRange(0, stringLength)];


        //Set Background Color
        UIColor *backgroundColor=[UIColor orangeColor];
        [attString addAttribute:NSBackgroundColorAttributeName value:backgroundColor range:wordRange];

        //Set Foreground Color
        UIColor *foregroundColor=[UIColor blueColor];
        [attString addAttribute:NSForegroundColorAttributeName value:foregroundColor range:wordRange];

        NSLog(@"Found tag %@", word);

    }

    // Set up your text field or label to show up the result

    //    yourTextField.attributedText = attString;
    //
    //    yourLabel.attributedText = attString;

    return attString;
}