Push new view controller when button is pressed

Question

I'm building a game in Swift 5 programmatically and want to navigate from the main menu to the game screen. Here is my code:

func handleButtonsTapped() {
    playButton.addTarget(self, action: #selector(pushGameViewController), for: .touchUpInside)
}

And the selector to handle pushing the view controller when tapped:

@objc func pushGameViewController() {
    let destinationVC = GameViewController()
    navigationController?.pushViewController(destinationVC, animated: true)
}

When I tap the button in simulator nothing happens. I have handleButtonsTapped() called in my viewDidLoad() function as well.

Does `pushGameViewController` get called? (Use "print" or a breakpoint to find out.) — Phillip Mills, Mar 20 '20 at 00:33
It's supposed to get called when the button is tapped but I'll use a print statement to be sure. — c0ded_truth, Mar 20 '20 at 01:14

score 1 · Accepted Answer · answered Mar 20 '20 at 03:42

1

Got an answer!

In my SceneDelegate.swift I set:

let menuViewController = UINavigationController(rootViewController: MenuViewController())
window?.rootViewController = menuViewController

Now it works! Thanks for the comments everyone :)

answered Mar 20 '20 at 03:42

c0ded_truth

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score 1 · Answer 2 · answered Mar 20 '20 at 03:57

You can not initialize a storyboard view controller outlet directly. Rather you can load it from the bundle where your storyboard takes place. Follow this belowing steps.

First of all set Storyboard Id 'GameViewController'(according to screenshot).

Then replace the pushGameViewController function by the below one.

@objc func pushGameViewController() {
    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    let destinationVC = storyboard.instantiateViewController(withIdentifier: "GameViewController")
    self.navigationController?.pushViewController(destinationVC, animated: true)
}

score 1 · Answer 3 · answered Mar 22 '20 at 01:41

@objc func pushGameViewController() {
    let destinationVC = storyboard.instantiateViewController(withIdentifier: "GameViewController") as! GameViewController
    navigationController?.pushViewController(destinationVC, animated: true)
}

Be sure to give your view controller a storyboard id called GameViewController in the interface builder

score 0 · Answer 4 · answered Mar 20 '20 at 02:42

This is my code and this can running.

Is your ViewController set for UINavigation?

@IBOutlet weak var playButton: UIButton!

override func viewDidLoad() {
    super.viewDidLoad()
    handleButtonsTapped()
}

func handleButtonsTapped() {
    playButton.addTarget(self, action: #selector(pushGameViewController), for: .touchUpInside)
}

@objc func pushGameViewController() {
    let destinationVC = GameViewController()
    navigationController?.pushViewController(destinationVC, animated: true)
}

Push new view controller when button is pressed

4 Answers4