在iOS App中检测哈希标记＃，提及标签@ [英] Detect hash tags #, mention tags @, in iOS like in Twitter App

问题描述

我需要检测描述 UILabel 中的 #Tags ，并将文字颜色更改为 [UIColor BlueColor]; 我无法将 UILabel 中的特定文本颜色更改为Blue。现在我在自定义 UITableViewCell 中使用此 UILabel 。有没有办法解决这个问题，以区分 #Tags 和普通文本的文字颜色？任何人可以帮助我解决这个

解决方案

   - ？（NSMutableAttributedString *）decorateTags :( NSString *）stringWithTags {
 
 
 NSError * error = nil; 
 
 //对于 维杰#Apple开发 
 NSRegularExpression *正则表达式= [NSRegularExpression regularExpressionWithPattern：@ ＃（\\w +） 选项：0错误：&安培;错误]; 
 
 //对于 维杰@Apple开发 
 // NSRegularExpression *正则表达式= [NSRegularExpression regularExpressionWithPattern：@ @（\\w +） 选项：0错误：&安培;误差]。 
 
 NSArray * matches = [regex matchesInString：stringWithTags options：0 range：NSMakeRange（0，stringWithTags.length）]; 
 NSMutableAttributedString * attString = [[NSMutableAttributedString alloc] initWithString：stringWithTags]; 
 
 NSInteger stringLength = [stringWithTags length]; 
 
 for（NSTextCheckingResult *匹配中匹配）{
 
 NSRange wordRange = [match rangeAtIndex：1]; 
 
 NSString * word = [stringWithTags substringWithRange：wordRange]; 
 
 //设置字体
 UIFont * font = [UIFont fontWithName：@Helvetica-Bold尺寸：15.0f]; 
 [attString addAttribute：NSFontAttributeName value：font range：NSMakeRange（0，stringLength）]; 
 
 
 //设置背景颜色
 UIColor * backgroundColor = [UIColor orangeColor]; 
 [attString addAttribute：NSBackgroundColorAttributeName value：backgroundColor range：wordRange]; 
 
 //设置前景颜色
 UIColor * foregroundColor = [UIColor blueColor]; 
 [attString addAttribute：NSForegroundColorAttributeName value：foregroundColor range：wordRange]; 
 
 NSLog（@找到标签％@，字）; 
 
} 
 
 //设置文本字段或标签以显示结果
 
 // yourTextField.attributedText = attString; 
 // 
 // yourLabel.attributedText = attString; 
 
返回attString; 
} 
  

I need to Detect #Tags given in description UILabel and change text color as [UIColor BlueColor]; where i am not able to change particular text colors in UILabel to Blue. Now i am Using this UILabel in custom UITableViewCell. is there any way to solve this issue to differentiate #Tags and normal text by Text Colors ? can anybody help me to solve this ?

解决方案

-(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;
}

这篇关于在iOS App中检测哈希标记＃，提及标签@的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！