Wrong swipe direction in navigation in Right to Left

Question

I disable views rotation (process when Hebrew language is selected and all views change their positions from left to right) when phone has RightToLeft localization:

if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"9.0")){
    if (RightToLeft) {
        [[UIView appearance] setSemanticContentAttribute:UISemanticContentAttributeForceLeftToRight];
        [[UINavigationBar appearance] setSemanticContentAttribute:UISemanticContentAttributeForceLeftToRight];
    }
}

Everything looks fine, but I need to swipe right-to-left to return in previous view controller. How can I set left to right swipe direction for navigation between ViewControllers?

is your question about swipe gesture? what does the code represent? it is not related to swipe.please provide the correct code snippet — Jeyamahesan, Nov 08 '16 at 10:15
I disable RightToLeft rotation in my view controller by this code, but it doesn't solve problem with swipe direction, when we want to return back. — Konstantin.Efimenko, Nov 08 '16 at 10:18
Hi, did you set this because you always wanted your view in portrait mode? — KrishnaCA, Nov 08 '16 at 10:27
No, I did it because I wanted the same view's position even when language set in Hebrew — Konstantin.Efimenko, Nov 08 '16 at 10:33
@Konstantin.Efimenko I am looking for the same. Did you find any solution? — Maniganda saravanan, Mar 29 '17 at 05:36
Try this answer and let me know: https://stackoverflow.com/a/48383893/1953178 — Amr Hossam, Jan 25 '18 at 14:40

score 6 · Answer 1 · answered Jul 27 '18 at 08:57

I finally got one working for those who subclassed the UINavigationController class. You should do something like this :

final class TestNavigationController: UINavigationController, UINavigationControllerDelegate {

    override func viewDidLoad() {
         super.viewDidLoad()
         self.delegate = self
    }

    func navigationController(_ navigationController: UINavigationController, didShow viewController: UIViewController, animated: Bool) {
         navigationController.view.semanticContentAttribute = UIView.isRightToLeft() ? .forceRightToLeft : .forceLeftToRight
         navigationController.navigationBar.semanticContentAttribute = UIView.isRightToLeft() ? .forceRightToLeft : .forceLeftToRight
    }
}

extension UIView {

    static func isRightToLeft() -> Bool {
        return UIView.appearance().semanticContentAttribute == .forceRightToLeft
    }
}

Dynamically, your NavigationController will adapt to the forced semantic content attribute. I hope it helps. Let me know if you have any problems.

score 0 · Answer 2 · answered Sep 30 '20 at 13:49

I found the solution for it after searching long time, if someone seeks.

The previous answer may cause the UI to hang / freeze.

The reason that the UI freezes / hangs is because the UINavigationController is missing a check for the root view controller when the gesture is executed on the root view. There a few ways to fix that, the following is what I did.

You should subclass UINavigationController, this is the right way to go and add implement as followed:

class RTLNavController: UINavigationController, UINavigationControllerDelegate, UIGestureRecognizerDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        //  Adding swipe to pop viewController
        self.interactivePopGestureRecognizer?.isEnabled = true
        self.interactivePopGestureRecognizer?.delegate = self

        //  UINavigationControllerDelegate
        self.delegate = self
    }
    
    func navigationController(_ navigationController: UINavigationController, willShow viewController: UIViewController, animated: Bool) {
        navigationController.view.semanticContentAttribute = UIView.isRightToLeft() ? .forceRightToLeft : .forceLeftToRight
        navigationController.navigationBar.semanticContentAttribute = UIView.isRightToLeft() ? .forceRightToLeft : .forceLeftToRight
    }

    //  Checking if the viewController is last, if not disable the gesture
    func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
        if self.viewControllers.count > 1 {
            return true
        }
        
        return false
    }
}

extension UIView {
    static func isRightToLeft() -> Bool {
        return UIView.appearance().semanticContentAttribute == .forceRightToLeft
    }
}

Resources:

Original question: