No Swipe Back when hiding Navigation Bar in UINavigationController

Question

I love the swipe pack thats inherited from embedding your views in a UINavigationController. Unfortunately i cannot seem to find a way to hide the Naviga

Answer 1

Some people have had success by calling the setNavigationBarHidden method with animated YES instead.

Answer 2

The answer of Hunter Monk is really awesome, but unfortunately in iOS 13.3.1, it does not work.

I will explain another way to hide UINavigationBar and not lose swipe to back gesture. I have tested on iOS 13.3.1 and 12.4.3 and it works.

You need to create a custom class of UINavigationController and set that class for UINavigationController in Storyboard

Do NOT hide the NavigationBar on the Storyboard

Example on Storyboard:

And finally, put this: navigationBar.isHidden = true in viewDidLoad of CustomNavigationController class.

Make sure, do NOT use this method setNavigationBarHidden(true, animated: true) for hiding the NavigationBar.

import UIKit

class CustomNavigationController: UINavigationController {

    override func viewDidLoad() {
        super.viewDidLoad()

        navigationBar.isHidden = true
    }
}

Answer 3

Here is how to disable de gesture recognizer when user slides out of the ViewController. You can paste it on your viewWillAppear() or on your ViewDidLoad() methods.

if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
    self.navigationController.interactivePopGestureRecognizer.enabled = NO;
}

Answer 4

In my case, to prevent strange effects

Root view controller

override func viewDidLoad() {
    super.viewDidLoad()

    // Enable swipe back when no navigation bar
    navigationController?.interactivePopGestureRecognizer?.delegate = self
}

// UIGestureRecognizerDelegate
func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
    if let navVc = navigationController {
      return navVc.viewControllers.count > 1
    }
    return false
}

Answer 5

You can do it with a Proxy Delegate. When you are building the navigation controller, grab the existing delegate. And pass it into the proxy. Then pass all delegate methods to the existing delegate except gestureRecognizer:shouldReceiveTouch: using forwardingTargetForSelector:

Setup:

let vc = UIViewController(nibName: nil, bundle: nil)
let navVC = UINavigationController(rootViewController: vc)
let bridgingDelegate = ProxyDelegate()
bridgingDelegate.existingDelegate = navVC.interactivePopGestureRecognizer?.delegate
navVC.interactivePopGestureRecognizer?.delegate = bridgingDelegate

Proxy Delegate:

class ProxyDelegate: NSObject, UIGestureRecognizerDelegate {
    var existingDelegate: UIGestureRecognizerDelegate? = nil

    override func forwardingTargetForSelector(aSelector: Selector) -> AnyObject? {
        return existingDelegate
    }

    func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldReceiveTouch touch: UITouch) -> Bool {
        return true
    }  
}

Answer 6

There is a really simple solution that I tried and works perfectly, this is in Xamarin.iOS but can be applied to native too:

    public override void ViewWillAppear(bool animated)
    {
        base.ViewWillAppear(animated);
        this.NavigationController.SetNavigationBarHidden(true, true);
    }

    public override void ViewDidAppear(bool animated)
    {
        base.ViewDidAppear(animated);
        this.NavigationController.SetNavigationBarHidden(false, false);
        this.NavigationController.NavigationBar.Hidden = true;
    }

    public override void ViewWillDisappear(bool animated)
    {
        base.ViewWillDisappear(animated);
        this.NavigationController.SetNavigationBarHidden(true, false);
    }