IOS UITapGestureRecognizer点击手势

 1 var imageView：UIImageView！
 2 override func viewDidLoad() {
 3 super.viewDidLoad()
 4 // Do any additional setup after loading the view,
 typically from a nib.
 5 let rect = CGRect(x：0, y：80, width：320, height：
 
 6 self.imageView = UIImageView(frame：rect)
 7
 8 let image = UIImage(named：“lock”)
 9 imageView.image = image
 10
 11 imageView.isUserInteractionEnabled = true
 12 self.view.addSubview(self.imageView)
 13
 14 let guesture = UITapGestureRecognizer (target：self,action：#selector(ViewController.singleTap))
 15 imageView.addGestureRecognizer(guesture)
 16 }
 17 func singleTap()
 18 {
 19 let image = UIImage(named：“unlock”)
 20 imageView.image = image
 21 }