ios - 使用属性文本修改下划线的宽度？

Question

有没有办法修改 NSAttributedString 下划线的线宽？

看起来我可以很容易地修改颜色，但我不能轻易修改下划线本身的宽度。

Answer 1

可以设置NSUnderlineStyleThick或者NSUnderlineStyleSingle，eg:

NSAttributedString *str = [[NSAttributedString alloc] initWithString:@"Thick underline" attributes:@{NSUnderlineStyleAttributeName: @(NSUnderlineStyleThick)}];
NSAttributedString *str = [[NSAttributedString alloc] initWithString:@"Normal underline" attributes:@{NSUnderlineStyleAttributeName: @(NSUnderlineStyleSingle)}];

完整的下划线样式列表:https://developer.apple.com/library/prerelease/ios/documentation/UIKit/Reference/NSAttributedString_UIKit_Additions/index.html#//apple_ref/c/tdef/NSUnderlineStyle