Dismissing a Game View controller after Performing a Segue to another view controller in Swift

Question

My game looks something like this ----

Main View Controller -> Game View Controller -> Game Score View Controller

Now, After the game is over, I am performing a segue to the Game Score View Controller. But, the Game View Controller is still not dismissed, and since it detects any touch outside the Game View Controller the app crashes. I would appreciate it if anyone could please let me know how can I dismiss the Game View Controller once I perform a segue to the Game Score View Controller? Thanks a lot for the help!

func gameOver() {
    stopGame()
    performSegue(withIdentifier: "2to3segue", sender: self)
}

mxlhz · Answer 1 · 2020-11-08T15:38:51.710

1

Edit:

One way to do it would be to pass a reference of GameViewController to GameScoreViewController, and then dismiss the gameVC from it.

In GameViewController:

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier  == "2to3segue" {
        let destination = segue.destination as! GameScoreViewController
        destination.gameVC = self
    }
}

Then in GameScoreViewController:

weak var gameVC: GameScoreViewController?

and in ViewDidAppear you dismiss it:

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)
    self.gameVC?.dismiss(animated: false)
}

Assuming that you're using a NavigationController, you can use this extension in order to remove the GameViewController from the stack after performing your segue:

extension UINavigationController {
    func removeViewController(_ controller: UIViewController.Type) {
        if let viewController = viewControllers.first(where: { $0.isKind(of: controller.self) }) {
            viewController.removeFromParent()
        }
    }
}

Then once your performed you segue, you can remove the GameViewController from GameScoreViewController like so:

self.navigationController?.removeViewController(GameViewController.self)

Source

edited Nov 08 '20 at 15:38

answered Nov 08 '20 at 15:21

mxlhz

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Actually, I am not using a Navigation Controller in my Game. Any other suggestions? Thanks! – Pressing_Keys_24_7 Nov 08 '20 at 15:25
I edited the answer, let me know if it would work in your case. – mxlhz Nov 08 '20 at 15:39
Thanks for the answer! But, in GameScoreViewController gameVC should be weak var gameVC: GameViewController? and, even after doing that it is not dismissing the GameView Controller:( – Pressing_Keys_24_7 Nov 08 '20 at 15:51
How was presented GameViewController in the first place? – mxlhz Nov 08 '20 at 16:07
It was presented modally from the main view controller! @IBAction func playGame(_ sender: Any) { performSegue(withIdentifier: "1to2segue", sender: self) } – Pressing_Keys_24_7 Nov 08 '20 at 16:09
Ok, what about using `self.presentingViewController?.presentingViewController?.dismiss(animated: false)` in GameScoreViewController? – mxlhz Nov 08 '20 at 16:14
I included the following piece of code in my viewDidLoad method but it was still not dismissed:( – Pressing_Keys_24_7 Nov 08 '20 at 16:17
I absolutely have no clue why is It not dismissing the gameView Controller! – Pressing_Keys_24_7 Nov 08 '20 at 16:17
Yes it's weird... is it absolutely necessary for you to dismiss it? Why not making sure that everything is cleared and stopped in `stopGame()` so that you have no crash after, and then you unwind to MainViewController once you're done in the score VC? – mxlhz Nov 08 '20 at 16:20
Alright Thanks for your help mate! I have given you an upvote! Cheers:) – Pressing_Keys_24_7 Nov 08 '20 at 16:52

Dismissing a Game View controller after Performing a Segue to another view controller in Swift

1 Answers1