Swipe gesture in Swift 3

Question

Im trying to get a UISwipeGestureRecognizer to work in Swift 3, the default swipe right is working correctly though not up down or left.

I have tried it by control d

Answer 1

Step 1: Add swipe Gesture(s) in viewDidLoad() method.

override func viewDidLoad() {
    super.viewDidLoad()

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

    let swipeRight = UISwipeGestureRecognizer(target: self, action: #selector(handleGesture))
    swipeRight.direction = .right
    self.view.addGestureRecognizer(swipeRight)

    let swipeUp = UISwipeGestureRecognizer(target: self, action: #selector(handleGesture))
    swipeUp.direction = .up
    self.view.addGestureRecognizer(swipeUp)

    let swipeDown = UISwipeGestureRecognizer(target: self, action: #selector(handleGesture))
    swipeDown.direction = .down
    self.view.addGestureRecognizer(swipeDown)
}

Step 2: Check the gesture detection in handleGesture() method

func handleGesture(gesture: UISwipeGestureRecognizer) -> Void {
   if gesture.direction == .right {
        print("Swipe Right")
   }
   else if gesture.direction == .left {
        print("Swipe Left")
   }
   else if gesture.direction == .up {
        print("Swipe Up")
   }
   else if gesture.direction == .down {
        print("Swipe Down")
   }
}

I hope this will help someone.

UPDATE:

You need to use @objc to call your 'Selector' method for latest swift versions. ie,

@objc func handleGesture(gesture: UISwipeGestureRecognizer) -> Void {
  .
  .
  .
}