UINavigationController Interactive Pop Gesture Not Working?

Question

So I have a navigation controller in my built for iOS 7 app. The titleView is visible, as well as the back button and navigation bar its self. For some reason, the interac

Answer 1

Generically add interactive pop gesture to the whole app.

XCODE: 9.0, Swift: 4.0

Preferably create UINavigationController in AppDelegate.swift

1. Create a navigation controller

// I created a global variable, however not necessarily you will be doing this way
var nvc: UINavigationController!

2. implement UIGestureRecognizerDelegate

class AppDelegate: UIResponder, UIApplicationDelegate, UIGestureRecognizerDelegate {

3. Instantiat UINavigationController in application didFinishLaunchingWithOptions function

nvc=UINavigationController()

// For interactive pop gesture
nvc.navigationBar.isHidden=true
nvc?.interactivePopGestureRecognizer?.delegate=self

4. Extra step, add controller to navigation controller in application didFinishLaunchingWithOptions function

window=UIWindow()
window?.rootViewController=nvc
window?.makeKeyAndVisible()

// BaseViewController is sample controller i created with xib
nvc.pushViewController(BaseViewController(), animated: true)

5. Implement gusture recognizer, add below code to AppDelegate.swift

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

Note: See other post in this section for the difference between

self.navigationController?.navigationBar.isHidden=true

And

self.navigationController?.isNavigationBarHidden = true