viewに枠線をつけるSwift

viewのあるほうこうにだけ枠線をつける方法

コピペで使える！！はず！

private func setupBorder(view:UIView) {
        let bottomBorder = CALayer()
        bottomBorder.frame = self.getCGrect(view: view,text:"buttom")
        bottomBorder.backgroundColor = 色設定
        view.layer.addSublayer(bottomBorder)
    }

private func getCGrect(view:UIView,text:String)->CGRect {
        switch text {
          case "bottom":
                return CGRect(x: 0, y: view.frame.height, width: view.frame.width, height: 1.0) 
          case "up":
                return CGRect(x: 0, y: 0, width: view.frame.width, height: 1.0) 
          case "right":
                return CGRect(x: view.frame.width, y: 0, width: 1.0, height: view.frame.height)
          case "left":
                return CGRect(x: 0, y: 0, width: 1.0, height: view.frame.height) 
          default:
            break
       }
    }