AppDelegate.swift

    func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response : UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {

        print("userNotificationCenter 2")

        if response.notification.request.identifier == "testIdentifier" {

            print("handling notification with the identifier 'testIdentifer'")

        }

        if let notification = response.notification.request.content.userInfo as? [String:AnyObject]{

            print (notification as Any)

            let message = parseRemoteNotification(notification: notification)

            print(message!)

            let seq = parseOrderSeq(notification: notification)

            print(seq!)

            var loginVC : UIViewController?

            loginVC = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "LoginViewController") as! LoginViewController

            let appDelegate = UIApplication.shared.delegate as! AppDelegate

            appDelegate.window?.rootViewController = loginVC

        }

        completionHandler()

    }

2019-05-23 15:14:41.282374+0900 bossapp[38816:10485392] Warning: Attempt to present <UIAlertController: 0x105007200> on <bossapp.LoginViewController: 0x103526eb0> whose view is not in the window hierarchy!