View Controller disappearing after Segue

Question

I have a customer tab controller that has a custom icon that when a user clicks a popup menu comes up with 3 choices. When I click the first option it should take me to a new view controller, however when I click it the view controller only appears for a second before disappearing again. I'm not sure why but here is my code for the customer tab bar:

import UIKit
import PopMenu

class TabBarController: UITabBarController, UITabBarControllerDelegate {

    override func viewDidLoad() {
        delegate = self
    }

    func tabBarController(_ tabBarController: UITabBarController, shouldSelect viewController: UIViewController) -> Bool {
        if viewController.title == "for custom action" {
            let manager = PopMenuManager.default

            let action1 = PopMenuDefaultAction(title: "Scan Barcode", didSelect: { action in

                self.performSegue(withIdentifier: "showScanBarcode", sender: nil)
                print("\(String(describing: action.title)) is tapped")
            })

            let action2 = PopMenuDefaultAction(title: "Action 2", didSelect: { action in

                print("\(String(describing: action.title)) is tapped")
            })

            let action3 = PopMenuDefaultAction(title: "Action 3", image: UIImage(named: "wine"), didSelect: { action in
                print("\(String(describing: action.title)) is tapped")
            })

            manager.addAction(action1)
            manager.addAction(action2)
            manager.addAction(action3)

            manager.present()


            return false
        }
        return true
    }

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if segue.identifier == "mySegue" {

            let controller = segue.destination as! myViewController

            controller.navigationItem.leftBarButtonItem = splitViewController?.displayModeButtonItem
            controller.navigationItem.leftItemsSupplementBackButton = true

        }
    }

}

Here is an image showing the flow. User clicks the camera button, then a popup menu appears and when the user clicks on an option I want to take them to a new view controller (not connected to tab bar controller). I setup the first link to go to a new view controller, and it shows for a few seconds then disappears.

Answer 1

You are using different identifier for segue method,

performSegue(withIdentifier: "showScanBarcode", sender: nil)

AND

prepare(for segue: UIStoryboardSegue, sender: Any?).

So, please use same identifier. Hope this will help you.