UITextView 设置同一段文字，多个文字颜色

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利用NSMutableAttributedString实现

预览图如下

• 创建 NSAttributedString

 let subjectString1 = NSAttributedString(string: "CLUD:  ", attributes: [NSAttributedStringKey.foregroundColor: UIColor.white, NSAttributedStringKey.font: UIFont.init(name: "Quicksand-Bold", size: ScreenUtil.getRelativeWidth(22))])

 var subjectString2 = NSAttributedString(string: "HAVE FUN", attributes: [NSAttributedStringKey.foregroundColor: UIColor.init(hexString: "#FBE85B"), NSAttributedStringKey.font: UIFont.init(name: "Quicksand-Bold", size: ScreenUtil.getRelativeWidth(22))])

• 创建 NSMutableAttributedString

var message = NSMutableAttributedString(attributedString: subjectString1)
        message.append(subjectString2)

• 设置 attributedText

var textView = UITextView()
textView.attributedText = message