Initial View Controller from everywhere

Question

I got an application with a navigation view controller as Initial View Controller. After loading the initial view controller, I set up a notification listener. The Notification can be posted everywhere in the app. I have some pushed vc's and also modally presented. My goal is to return to the initial vc and present a modal view controller from there if the notification is triggered but I have no Idea how to do that. Do I need to do this outside of the MainViewController?

Answer 1

Answer assumes rootViewController is UINavigationController as specified by OP in his question

You can achieve what you want using

(UIApplication.shared.keyWindow?.rootViewController as! UINavigationController).dismiss(animated: true) {
    (UIApplication.shared.keyWindow?.rootViewController as! UINavigationController).popToRootViewController(animated: true)
}

Whats happening is pretty simple. Knowing that your initial viewCOntroller is always UINavigationController , initially check if you have anything presented on rootView controller, if yes dismiss it and in the completion block pop to rootViewController of your initial viewController.

Hope it helps