如何向右滑动以在Swift 3中显示新的View Controller？

Question

我希望能够在我的右侧滑动,ViewController这将显示另一个视图控制器,CommunitiesViewController.

我已经查看了其他线程并找到了一些方法,但我相信它们适用于Swift 2.

这是我在我的代码中使用的代码ViewController:

override func viewDidLoad() {
    super.viewDidLoad()

    let swipeRight = UISwipeGestureRecognizer(target: self, action: Selector(("respondToSwipeGesture")))
    swipeRight.direction = UISwipeGestureRecognizerDirection.right
    self.view.addGestureRecognizer(swipeRight)
}

  func respondToSwipeGesture(gesture: UIGestureRecognizer) {

    print ("Swiped right")

    if let swipeGesture = gesture as? UISwipeGestureRecognizer {

        switch swipeGesture.direction {

        case UISwipeGestureRecognizerDirection.right:


            //change view controllers

            let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)

            let resultViewController = storyBoard.instantiateViewController(withIdentifier: "CommunitiesID") as! CommunitiesViewController

            self.present(resultViewController, animated:true, completion:nil)    


        default:
            break
        }
    }
}

我给CommunitiesViewController了一个故事板ID CommunitiesID.

但这不起作用,当我向右滑动时出现以下错误,应用程序崩溃:

libc ++ abi.dylib:以NSException类型的未捕获异常终止

Answer 1

试试:

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

    // Gesture Recognizer     
    let swipeRight = UISwipeGestureRecognizer(target: self, action: #selector(self.respondToSwipeGesture))
    swipeRight.direction = UISwipeGestureRecognizerDirection.right

    self.view.addGestureRecognizer(swipeRight)
    let swipeLeft = UISwipeGestureRecognizer(target: self, action: #selector(self.respondToSwipeGesture))
    swipeLeft.direction = UISwipeGestureRecognizerDirection.left
    self.view.addGestureRecognizer(swipeLeft)

}

然后添加功能:

func respondToSwipeGesture(gesture: UIGestureRecognizer) {
    if let swipeGesture = gesture as? UISwipeGestureRecognizer {
        switch swipeGesture.direction {
        case UISwipeGestureRecognizerDirection.right:
            //right view controller
            let newViewController = firstViewController() 
            self.navigationController?.pushViewController(newViewController, animated: true)
        case UISwipeGestureRecognizerDirection.left:
            //left view controller
            let newViewController = secondViewController() 
            self.navigationController?.pushViewController(newViewController, animated: true)
        default:
            break
        }
    }
}