如何在Bar Button Item的第二行文字中添加下划线？

Question

这就是我想要达到的目标：

我想有两个单独的原因字符串，并将它们结合在一起。不确定这是否唯一的方法？

UPDATE

按钮显示 “（空）” 如果使用setAttributedTitle。如果使用setTitle，它可以显示没有属性的正确字符串。

仍然无法以预期的方式显示。任何想法？

// Set current bar button attributes 
NSMutableAttributedString *currentBarAttributedString = [[NSMutableAttributedString alloc] init]; 
[currentBarAttributedString appendAttributedString:[[NSAttributedString alloc] initWithString:@"REQUEST\n" 
                     attributes:@{NSUnderlineStyleAttributeName: @(NSUnderlineStyleNone)}]]; 
[currentBarAttributedString appendAttributedString:[[NSAttributedString alloc] initWithString:@"EQUIPMENT" 
                        attributes:@{NSUnderlineStyleAttributeName: @(NSUnderlineStyleSingle)}]]; 
// Initialize buttons and set titles 
UIButton *button1 = [UIButton buttonWithType:UIButtonTypeCustom]; 
[button1 setAttributedTitle:currentBarAttributedString forState:UIControlStateNormal]; 
// [button1 setTitle:[currentBarAttributedString string] forState:UIControlStateNormal]; 

Answer 1

要添加边框的文本或改变颜色格式化。这里是使用的示例代码。 在

- (void)viewDidLoad { 
    [super viewDidLoad]; 

    NSString *strFirst = @"Request Equipment"; 
    NSString *strSecond = @"Active Rentals"; 


NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] init]; 

[attributedString appendAttributedString:[[NSAttributedString alloc] initWithString:strFirst 
                     attributes:@{NSUnderlineStyleAttributeName: @(NSUnderlineStyleSingle), 
                      NSForegroundColorAttributeName:[UIColor yellowColor]}]]; 
[attributedString appendAttributedString:[[NSAttributedString alloc] initWithString:strSecond 
                     attributes:@{NSUnderlineStyleAttributeName: @(NSUnderlineStyleNone),NSForegroundColorAttributeName:[UIColor whiteColor]}]]; 
//To use attribute string in button 
[self.btnAttributeString setAttributedTitle:attributedString forState:UIControlStateNormal]; 
} 

输出使用这段代码是

请检查这一点，让我知道的任何问题。

Answer 2

只需创建一个NSAttributedString并根据需要

NSString *alertString = @"All heroes do not wear capes."; 

NSMutableParagraphStyle* paragraphStyle = [[NSMutableParagraphStyle alloc] init]; 
paragraphStyle.alignment = NSTextAlignmentLeft; 

NSDictionary *attrs = @{ 
NSParagraphStyleAttributeName: paragraphStyle, 
         //provide a nsdict here with attributes you want to apply to the whole of the string. 
         }; 
NSDictionary *subAttrs = @{ 
          NSParagraphStyleAttributeName: paragraphStyle, 
          //Here provide attributes for the not underlined part of the string. 
          }; 
NSDictionary *subAttrs2 = @{ 
          NSParagraphStyleAttributeName: paragraphStyle, 
          //Here provide attributes for the underlined part of the string 
          }; 

//Set the range of the sub attributes. 
const NSRange range = NSMakeRange(0,3); 
const NSRange range2 = NSMakeRange(5,4); 

NSMutableAttributedString *attributedText = 
[[NSMutableAttributedString alloc] initWithString:alertString 
             attributes:attrs]; 
[attributedText setAttributes:subAttrs range:range]; 
[attributedText setAttributes:subAttrs2 range:range2]; 

现在设置该属性串作为你的归因标题

Answer 3

class UnderlinedLabel: UILabel { 

     override var text: String! { 

      didSet { 
       let textRange = NSMakeRange(0, count(text)) 
       let textRange = NSMakeRange(0, text.characters.count) 
       let attributedText = NSMutableAttributedString(string: text) 
       attributedText.addAttribute(NSUnderlineStyleAttributeName , value:NSUnderlineStyle.StyleSingle.rawValue, range: textRange) 
       // Add other attributes if needed 

       self.attributedText = attributedText 
      } 
     } 
    }