PanGesture Recognizer not working. [Swift]

Question

I would like to go back to the previous view by using Pangesture (drag view) but I can't. I can do function “pan” only on the left edge of the screen, let's say 5%. The other area of current view the Pangesture function is not working. Is there any way that I can go back to the root view with Pangesture? Please advise. Thank you.

    var pan = UIPanGestureRecognizer(target: self, action: "handlePanGesture:")
    self.mainView.addGestureRecognizer(pan)


  func handlePanGesture(recognizer: UIPanGestureRecognizer) {

    var touchLocation = recognizer.translationInView(self.view)

????

}

Answer 1

Here's an example of a view controller that uses a UIPanGestureRecognizer setup on the storyboard:

(Just one inspector shown for example purposes)

ViewController:

class PhotoDetaislViewController: UIViewController {

// the connection
@IBOutlet var swipeRight: UISwipeGestureRecognizer!

override func viewDidLoad() {
    super.viewDidLoad()

//Swipe navigation
    swipeRight.addTarget(self, action: "swipeRight:") // sets up the swipeRight var

}

func swipeRight(sender: UISwipeGestureRecognizer) {

    // do your navigation here

}
}