3D Touch Quick Action Won't work swift 3 - ios

Question

I am trying to add 3D touch quick action in my app. I have two viewContollers embedded in navigationContoller. When the user press on the 3D action, it should take them to the add events viewController. But i am getting this error
could not cast value of type 'Morning_Star_2.AddEventsViewController' (0x1000a2260) to 'UINavigationController' (0x1a79cd360).
2017-05-02 02:51:36.220324-0400 Morning Star 2[3731:895126] Could not cast value of type 'Morning_Star_2.AddEventsViewController' (0x1000a2260) to 'UINavigationController' (0x1a79cd360).
Here is my code
func application(_ application: UIApplication, performActionFor shortcutItem: UIApplicationShortcutItem, completionHandler: #escaping (Bool) -> Void) {
if shortcutItem.type == "com.krp.addEvent" {
let sb = UIStoryboard(name: "Main", bundle: nil)
let addEventVC = sb.instantiateViewController(withIdentifier: "addEventVC") as! UINavigationController
self.window?.rootViewController?.present(addEventVC, animated: true, completion: nil)
}
}
I tried changing as! UINavigationController to as! AddEventsViewController. It works, but then it won't show the navigation bar on the top on my add viewController as it normally would if you open the app normally.
Here is my main.storyboard

Answer 1

You shouldn't cast AddEventsViewController to UINavigationController, because it isn't UINavigationController, is just subclass of UIViewController. But as I see, your rootViewController is. So you need to cast it to UINavigationController, and then push your AddEventsViewController, instead present, and you will see NavigationBar
func application(_ application: UIApplication, performActionFor shortcutItem: UIApplicationShortcutItem, completionHandler: #escaping (Bool) -> Void) {
if shortcutItem.type == "com.krp.addEvent" {
let sb = UIStoryboard(name: "Main", bundle: nil)
let addEventVC = sb.instantiateViewController(withIdentifier: "addEventVC") as! AddEventsViewController
if let navigationController = window?.rootViewController as? UINavigationController {
navigationController.pushViewController(addEventVC, animated: true)
}
}
}