How do you use IBSegueAction with navigation controller?

Should do something like this:

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    var destinationViewController = segue.destination
    if let navigationController = destinationViewController as? UINavigationController {
        destinationViewController = navigationController.visibleViewController ?? destinationViewController
    }

Could look at Stanford course CS193 for a detailed explanation.

h ttps://web.stanford.edu/class/cs193p/Winter2017/L6FaceIt.zip

@claude31: you didn't read the question.

@realli15: I've got this working, but it might not be the best solution.

You have two segues here: one which presents the UINavigationController, and another which sets the root ViewController inside the UINavigationController - so I pass the data through both segues, using a custom UINavigationController.

In my case, I have three ViewControllers:

- MainViewController (extends UIViewController)

- SettingsNavigationController (extends UINavigationController)

- SettingsViewController (extends UIViewController)

I want to create a SettingsViewModel in the MainViewController, and pass it through to the SettingsViewController.

So I first pass it into SettingsNavigationController, using an @IBSegueAction in MainViewController. This creates SettingsNavigationController, passing in the SettingsViewModel, which is stored in a property. The "present navigation controller" segue is wired up to this instantiation function.

Then I also have an @IBSegueAction in SettingsNavigationController, which makes the SettingsViewController, passing in the stored SettingsViewModel. The "set root viewcontroller" segue is wired up to this instantiation function.

Hope that helps :-)

Excuse me, I just replied to:

Unfortunately, the destination view controller is wrapped in a UINavigationController, which means that I have to return a UINavigationController.

Now, if the point is to find how to use IBAction instead, I would try by:

- subclassing navigationController

- in order to create :

@IBSegueAction
private func showPreview(coder: NSCoder)
    ->MyNavController? {
    MyNavController(coder: coder, param: param)
}

Then segue in the init of MyNavController

init(coder: coder, param: param)

I am not sure I can see the value of this.

Note: read this : h ttps://useyourloaf.com/blog/better-storyboards-with-xcode-11/

It sounds as if I'm having the same problem as you. I asked this question on StackOverflow… https://stackoverflow.com/questions/58545313/using-ibsegueaction-with-uinavigationcontroller

I answered it here: https://stackoverflow.com/a/60085063/259521