Present Subview inside a UINavigationController from Keyboard Extension - swift

Question

I have a keyboard extension and want the user to be able to tap on "settings", and be taken to the settings page inside the actual app. I was pretty excited when I got that working, but I realized that the page wasn't inside the navigation controller anymore!
Here is my code. How can I augment it to present a specific sub-screen inside my 'TransparentNavigationController'?
func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -> Bool {
let urlPath : String = url.path as String!
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
if(urlPath == "/inner"){
let innerPage: myStampsVC = mainStoryboard.instantiateViewController(withIdentifier: "myStampsVC") as! myStampsVC
self.window?.rootViewController = innerPage
}
self.window?.makeKeyAndVisible()
return true
}
I've tried different mixes of
let navigationController = window?.rootViewController as! UINavigationController
let innerPage = navigationController.viewControllers[4] as! myStampsVC
but I'm missing something. Thanks for any nudges in the right direction.

Answer 1

Here's the answer:
func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -> Bool {
let urlPath = url.path
if(urlPath == "/inner"){
func showMyStamps(in navigationController: UINavigationController) {
navigationController.popToRootViewController(animated: false)
_ = navigationController.topViewController?.view
let innerViewController = myStampsVC() as UIViewController
navigationController.pushViewController(innerViewController, animated: false)
}
switch window!.rootViewController {
case let demo as DemoScreen:
if let navC = demo.presentedViewController as? UINavigationController {
showMyStamps(in: navC)
} else {
let storyBoard = UIStoryboard(name: "Main", bundle: nil)
let navC = storyBoard.instantiateViewController(withIdentifier: "TransparentNavController") as! UINavigationController
demo.present(navC, animated: false)
showMyStamps(in: navC)
}
case let navC as UINavigationController:
showMyStamps(in: navC)
default: assertionFailure()
}
}
return true
}