另一类中的滑动手势识别器

我有一个ViewController,它连接到第二个view SecondViewController,我想用一个UI手势从一个切换到另一个

class ViewController: UIViewController{

        override func viewDidLoad() {
        super.viewDidLoad()

        let svc = SecondViewController()
        let leftSwipe = UISwipeGestureRecognizer(target: svc, action: #selector(svc.swipeAction(swipe:)))
        leftSwipe.direction = UISwipeGestureRecognizerDirection.left
        self.view.addGestureRecognizer(leftSwipe)
    }
}


class SecondViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        let rightSwipe = UISwipeGestureRecognizer(target: self, action: #selector(swipeAction(swipe:)))
        rightSwipe.direction = UISwipeGestureRecognizerDirection.right
        self.view.addGestureRecognizer(rightSwipe)



        // Do any additional setup after loading the view.
    }

    @objc func swipeAction(swipe: UISwipeGestureRecognizer)
    {
        print(swipe.direction.rawValue)
        switch swipe.direction.rawValue {

        case 1:
            performSegue(withIdentifier: "toTheLeft", sender: self)
        case 2:
            performSegue(withIdentifier: "toTheRight", sender: self)
        default:
            break
        }
    }

}

代码不工作,什么都没有发生,我没有错误消息。