InteractivePopGestureRecognizer distorts the navigation stack on the root view controller

Question

In mine, UINavigationControllerI added custom back buttons with a side effect that it is no longer possible to scroll left and right to pull out the view controller and go back.

So, I have implemented interactivePopGestureRecognizerin my custom class UINavigationController:

class UINavigationControllerExtended: UINavigationController, UIGestureRecognizerDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()

        if self.respondsToSelector(Selector("interactivePopGestureRecognizer")) {
            self.interactivePopGestureRecognizer?.delegate = self
        }
    }

    func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWithGestureRecognizer otherGestureRecognizer: UIGestureRecognizer) -> Bool {
        return true
    }

    func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldBeRequiredToFailByGestureRecognizer otherGestureRecognizer: UIGestureRecognizer) -> Bool {
        return gestureRecognizer.isKindOfClass(UIScreenEdgePanGestureRecognizer)
    }
}

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Answer 1

- interactivePopGestureRecognizer :

override func viewDidAppear(animated: Bool) {
    super.viewDidAppear(animated)

    self.navigationController?.interactivePopGestureRecognizer?.enabled = false
}

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Answer 2

UINavigationControllerDelegate / .

// Fix bug when pop gesture is enabled for the root controller
func navigationController(navigationController: UINavigationController, didShowViewController viewController: UIViewController, animated: Bool) {
    self.interactivePopGestureRecognizer?.enabled = self.viewControllers.count > 1
}

.

Answer 3

Swift 3
First, make a class for this:

import UIKit

class Total: NSObject,UIGestureRecognizerDelegate {

    //MARK:_Swip
    func backSwipVC(_ pr:UIViewController) {
        pr.navigationController?.interactivePopGestureRecognizer?.isEnabled = true
        pr.navigationController?.interactivePopGestureRecognizer?.delegate = self
    }

}  

and name it in viewDidLoad () as follows:

Total().backSwipVC(self)