Ios 无法在WKInterfaceLabel上使用NSAttributedString

我想在WKInterfaceLabel中显示带下划线的某些字符

NSMutableAttributedString *attrString=[[NSMutableAttributedString alloc] initWithString:@"123.45"];
NSInteger attrStringLength =[attrString length];

NSRange range = NSMakeRange(0, 1);                // works
NSRange range = NSMakeRange(0, 2);                // works
NSRange range = NSMakeRange(0, attrStringLength); // works
NSRange range = NSMakeRange(1, 1); // does not work
NSRange range = NSMakeRange(2, 2); // does not work

[attrString addAttributes:@{
                            NSUnderlineStyleAttributeName : @(NSUnderlineStyleSingle | NSUnderlinePatternSolid) // style
                            }
                    range:range];

[self.valueLabel setAttributedText:attrString];

当范围位置为0=字符串的开头时，无论长度如何，它都能正常工作-范围中的字符带下划线

NSMutableAttributedString *attrString=[[NSMutableAttributedString alloc] initWithString:@"123.45"];
NSInteger attrStringLength =[attrString length];

NSRange range = NSMakeRange(0, 1);                // works
NSRange range = NSMakeRange(0, 2);                // works
NSRange range = NSMakeRange(0, attrStringLength); // works
NSRange range = NSMakeRange(1, 1); // does not work
NSRange range = NSMakeRange(2, 2); // does not work

[attrString addAttributes:@{
                            NSUnderlineStyleAttributeName : @(NSUnderlineStyleSingle | NSUnderlinePatternSolid) // style
                            }
                    range:range];

[self.valueLabel setAttributedText:attrString];

但是将位置设置为0以外的任何其他值都不起作用-没有下划线

NSMutableAttributedString *attrString=[[NSMutableAttributedString alloc] initWithString:@"123.45"];
NSInteger attrStringLength =[attrString length];

NSRange range = NSMakeRange(0, 1);                // works
NSRange range = NSMakeRange(0, 2);                // works
NSRange range = NSMakeRange(0, attrStringLength); // works
NSRange range = NSMakeRange(1, 1); // does not work
NSRange range = NSMakeRange(2, 2); // does not work

[attrString addAttributes:@{
                            NSUnderlineStyleAttributeName : @(NSUnderlineStyleSingle | NSUnderlinePatternSolid) // style
                            }
                    range:range];

[self.valueLabel setAttributedText:attrString];

---

还有其他人有这个问题吗？我使用的是Xcode 6.2 iOS 8.2，并在模拟器中进行测试。

它与您提供的配置完全相同

在动态字符串赋值的情况下，可能存在位置和长度问题，您可能无法获得足够的文本长度，而您正试图使其带下划线

NSMutableAttributedString *attrString=[[NSMutableAttributedString alloc] initWithString:@"123.45"];
NSInteger attrStringLength =[attrString length];

NSRange range = NSMakeRange(0, 1);                // works
NSRange range = NSMakeRange(0, 2);                // works
NSRange range = NSMakeRange(0, attrStringLength); // works
NSRange range = NSMakeRange(1, 1); // does not work
NSRange range = NSMakeRange(2, 2); // does not work

[attrString addAttributes:@{
                            NSUnderlineStyleAttributeName : @(NSUnderlineStyleSingle | NSUnderlinePatternSolid) // style
                            }
                    range:range];

[self.valueLabel setAttributedText:attrString];