IOS UILongPressGestureRecognizer 长按手势

 1 override func viewDidLoad() {
 2 super.viewDidLoad()
 3 // Do any additional setup after loading the view,
 typically from a nib.
 4 let rect = CGRect(x：0, y：80, width：320, height：
 
 5 self.imageView = UIImageView(frame：rect)
 6
 7 let image = UIImage(named：“lock”)
 8 imageView.image = image
 9
 10 imageView.isUserInteractionEnabled = true
 11 self.view.addSubview(self.imageView)
 12
 13 let guesture = UILongPressGestureRecognizer(target：
 self, action：#selector(ViewController.longPress(：)))
 14 guesture.minimumPressDuration = 1.0
 15 guesture.allowableMovement = 20.0
 16 imageView.addGestureRecognizer(guesture)
 17 }
 18 func longPress( gusture：
 UILongPressGestureRecognizer)
 19 {
 20 if(gusture.state == UIGestureRecognizerState.began)
 21 {
 22 let image = UIImage(named：“unlock”)
 23 imageView.image = image
 24 }
 25 }