swift 笔记3 （UILabel）

           let titleLab:UILabel=UILabel()

            titleLab.frame=CGRect(x: 0, y:0, width: w, height: h)

            titleLab.text= "label"

            titleLab.textAlignment = NSTextAlignment.center

            self.view.addSubview(titleLab)

            titleLab.backgroundColor = UIColor.green

            lettap:UITapGestureRecognizer=UITapGestureRecognizer(target:self, action:#selector(tap(tapGesture:)))

            titleLab.addGestureRecognizer(tap)

            titleLab.isUserInteractionEnabled = true

//tap click

  @objc func tap(tapGesture:UITapGestureRecognizer)  {

        letclickLab = tapGesture.viewas!UILabel

    }