在iOS中删除UILabel中的支架

Question

昨天我发布了这个问题：Removing parentheses from the string in iOS。但是我仍然无法从标签中删除括号。

不知道我的错误。花了整整一个晚上，仍然无法这样做。

我正在使用TTTAttributedLabel。我的代码如下所示：

-(TTTAttributedLabel*)setItalicTextForLabel:(TTTAttributedLabel*)attributedLabel fontSize:(float)Size 
{ 
    [attributedLabel setText:[self.infoDictionary objectForKey:@"description"] afterInheritingLabelAttributesAndConfiguringWithBlock:^NSMutableAttributedString *(NSMutableAttributedString *mutableAttributedString) 
    { 
     NSRange stringRange = NSMakeRange(0, [mutableAttributedString length]); 
     NSRegularExpression *regexp = ParenthesisRegularExpression(); 
     UIFont *italicSystemFont = [UIFont italicSystemFontOfSize:Size]; 
     DLog(@"%@",italicSystemFont.fontName); 
     CTFontRef italicFont = CTFontCreateWithName((__bridge CFStringRef)italicSystemFont.fontName, italicSystemFont.pointSize, NULL); 
     [regexp enumerateMatchesInString:[mutableAttributedString string] options:0 range:stringRange usingBlock:^(NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop) { 
      if (italicFont) { 
       [mutableAttributedString removeAttribute:(NSString *)kCTFontAttributeName range:result.range]; 
       [mutableAttributedString addAttribute:(NSString *)kCTFontAttributeName value:(__bridge id)italicFont range:result.range]; 
       CFRelease(italicFont); 
      } 
     }]; 

     return mutableAttributedString; 
    }]; 
    [[attributedLabel.text stringByReplacingOccurrencesOfString:@"[" withString:@""] stringByReplacingOccurrencesOfString:@"]" withString:@""]; 
    return attributedLabel; 
} 

仍然无法删除括号。任何人都可以指出我的错误吗？真的很感激帮助。

Answer 1

尝试改变最后两个符合此二：

[attributedLabel setText:[[attributedLabel.text stringByReplacingOccurrencesOfString:@"[" withString:@""] stringByReplacingOccurrencesOfString:@"]" withString:@""]]; 
return attributedLabel; 

与字符串开头的方法...不改变本身只返回被改变一个新的字符串的字符串。

顺便说一下，NSString对象是不可变的。如果你想改变字符串，你可以使用NSMutableString，下面的实现只使用NSMutabeString，你已经在块中使用了。

-

试试这个：

-(TTTAttributedLabel*)setItalicTextForLabel:(TTTAttributedLabel*)attributedLabel fontSize:(float)Size 
{ 
    [attributedLabel setText:[self.infoDictionary objectForKey:@"description"] afterInheritingLabelAttributesAndConfiguringWithBlock:^NSMutableAttributedString *(NSMutableAttributedString *mutableAttributedString) 
    { 
     NSRange stringRange = NSMakeRange(0, [mutableAttributedString length]); 
     NSRegularExpression *regexp = ParenthesisRegularExpression(); 
     UIFont *italicSystemFont = [UIFont italicSystemFontOfSize:Size]; 
     DLog(@"%@",italicSystemFont.fontName); 
     CTFontRef italicFont = CTFontCreateWithName((__bridge CFStringRef)italicSystemFont.fontName, italicSystemFont.pointSize, NULL); 
     [regexp enumerateMatchesInString:[mutableAttributedString string] options:0 range:stringRange usingBlock:^(NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop) { 
      if (italicFont) { 
       [mutableAttributedString removeAttribute:(NSString *)kCTFontAttributeName range:result.range]; 
       [mutableAttributedString addAttribute:(NSString *)kCTFontAttributeName value:(__bridge id)italicFont range:result.range]; 
       CFRelease(italicFont); 
       NSRange range1 = NSMakeRange (result.range.location, 1); 
       NSRange range2 = NSMakeRange (result.range.location + result.range.length-2, 1); 
       [mutableAttributedString replaceCharactersInRange:range1 withString:@""]; 
       [mutableAttributedString replaceCharactersInRange:range2 withString:@""]; 
      } 
     }]; 
     return mutableAttributedString; 
    }]; 
    return attributedLabel; 
}