NavigationController PushViewController does not show

I am trying to navigate to the ClassroomViewController once I receive the push notification. I have put a break point, and it hits all the lines, but it does not show the ClassroomViewController. I am wondering what I am missing in my current implementation.

I added identifier on the ClassroomViewController on storyboard.

AppDelegate

public var keyWindow: UIWindow? {   return UIApplication.shared.windows.first { $0.isKeyWindow }  }  

Helper Method

private func notificationToNavigate() {    guard let appDelegate = UIApplication.shared.delegate as? AppDelegate,            let topViewController = appDelegate.keyWindow?.rootViewController    else { return }      let storyboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)    let cVC = storyboard.instantiateViewController(withIdentifier:"ClassroomViewController") as! ClassroomViewController    topViewController.navigationController?.pushViewController(cVC, animated: true)  }  

https://stackoverflow.com/questions/66757035/navigationcontroller-pushviewcontroller-does-not-show March 23, 2021 at 11:51AM