使用 Swift 在 UILabel 中强调文本

 let label = UILabel.init(frame: CGRect(x: 0, y:0, width: 100, height: 40))
 label.backgroundColor = .lightGray
 let attributedString = NSMutableAttributedString.init(string: "Apply UnderLining")
 attributedString.addAttribute(NSUnderlineStyleAttributeName, value: 1, range: NSRange.init(location: 0, length: attributedString.length))
 label.attributedText = attributedString