push to the nextViewcontroller from popUp is not working

Question

I have a UIViewcontroller that presents a popUpView with two buttons, cancel and continue respectively.. but the problem is that when I press the continue button, UINavigationController is not pushing to the next UIViewcontroller.. .

-- onNextButtonTapped:

 @IBAction func onOkayButtonClicked(_ sender: UIButton) {
        self.dismiss(animated: true, completion: {
            let nextVC = self.storyboard?.instantiateViewController(withIdentifier: "nextVC") as! NextViewController
           // let nextVCNav = UINavigationController(rootViewController: nextVC)
           //self.navigationController?.pushViewController(nextVCNav, animated: true)

            
            self.navigationController?.pushViewController(nextVC, animated: true)
        })
    }

Did miss something?

can you try removing self.dismiss and directly navigate to the nextVC? — vijeesh, Dec 14 '20 at 08:16
@IBAction func onOkayButtonClicked(_ sender: UIButton) { let nextVC = self.storyboard?.instantiateViewController(withIdentifier: "nextVC") as! NextViewController self.navigationController?.pushViewController(nextVC, animated: true) } like this — vijeesh, Dec 14 '20 at 08:17
When you dismiss your current screen self is the current screen but actually, this screen is dismissed so, first find the topmost controller and push your controller on this. To find the topmost controller: https://stackoverflow.com/a/51788567/14733292. Or you can also use closure and protocol. — Raja Kishan, Dec 14 '20 at 08:17
@vijeesh, I have tried that too, did not work.. . and `self.navigationController` prints `nil` now. — dumbDev, Dec 14 '20 at 08:18
@vijeesh from the presented controller you can not directly navigate to the nextVC because the presented controller does not have navigation. For this, you need to present with a navigation controller. — Raja Kishan, Dec 14 '20 at 08:20
@RajaKishan Okeye, so he can create a delegate back to the VC and perform the navigation right? — vijeesh, Dec 14 '20 at 08:23
@vijeesh. yes, you can create a delegate also use closure for alternative. — Raja Kishan, Dec 14 '20 at 08:41
@dumbDev please first debug your code. First, check whether your back controller has navigation or not. And check which controller returns from the top controller function and check returns controller has navigation or not. — Raja Kishan, Dec 14 '20 at 08:44
For topmost controller use this https://stackoverflow.com/a/64301729/14733292 — Raja Kishan, Dec 14 '20 at 08:45
@dumbDev Did you try tap on the screen? Because when push method is not called on main thread it's a common issue. — Łukasz Łabuński, Dec 14 '20 at 09:11
If understand correctly you are presenting a view from a ViewController but you can't push anything from that view, you should use a delegation pattern. Can you please post the relevant code from which you present the view? — Mat, Dec 14 '20 at 09:41

score 1 · Answer 1 · answered Dec 14 '20 at 09:11

This seems like a controller chain issue. As from what I understand you must have presented the popup modally and by doing that you have moved out of the UINavigationController stack. So pushing a view from popupview controller is not an option. You can:

Create a protocol, (or block implementation) that inform viewcontroller which presented popup, that particular button was clicked (something similar to UIAlertController)
Make a popup as a view inside view controller and show and hide that with animation. That was you can add the action of the button of this popup to your view controller.

score 0 · Answer 2 · answered Dec 14 '20 at 11:30

0

I think the UINavigationController is not in hierarchy.
Try this

let nav = UINavigationController(rootViewController: self)
UIApplication.shared.keyWindow?.rootViewController = nav
nav.pushViewController(nextVC, animated: true)

answered Dec 14 '20 at 11:30

SAIF

126
8

push to the nextViewcontroller from popUp is not working

2 Answers2