swift 富文本設置

let str = "富文本設置"

 

      textView.isEditable = false

      self.view.addSubview(textView)

      

      let amountString = NSMutableAttributedString(string:str)

      let s = NSString(string: str)//需要這一步。

      let rang = s.range(of: s as String)

      amountString.addAttribute(NSFontAttributeName, value: UIFont.systemFont(ofSize: 13) ,range: rang)

      //行間距為5

      let paragraphStye = NSMutableParagraphStyle()

      paragraphStye.lineSpacing = 5

      amountString.addAttribute(NSParagraphStyleAttributeName, value: paragraphStye, range: rang)

      for i in 0..<arrStr.count{

         //與數組里相同的字符串，字體變大。也可改變顏色。

        //指定range范圍內的文本改變。

         let newRange = s.range(of: arrStr[i] as String)

         amountString.addAttribute(NSForegroundColorAttributeName, value: UIColor.black, range: newRange)

         amountString.addAttribute(NSFontAttributeName, value: UIFont.systemFont(ofSize: 15) ,range: newRange)

      }

      textView.attributedText = amountString