didFinishLaunchingWithOptions

 func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
           
           IQKeyboardManager.shared.enable = true
           IQKeyboardManager.shared.enableAutoToolbar = false
           FirebaseApp.configure()
           Messaging.messaging().delegate = self
           
           UNUserNotificationCenter.current().delegate = self
           let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]
           UNUserNotificationCenter.current().requestAuthorization(options: authOptions,completionHandler: {_, _ in })
           
           application.registerForRemoteNotifications()
           
           let sb = UIStoryboard.init(name: "Main", bundle: nil)
           
           let VC = { () -> UIViewController in
               
               if (launchOptions?[UIApplication.LaunchOptionsKey.remoteNotification] as? [AnyHashable: Any]) != nil {
                   let DashboardVC = sb.instantiateViewController(withIdentifier: "dashboard") as! DashBoardViewController
                   
                   DashboardVC.friendsView = (nottype == "chat")
                   DashboardVC.chatUserSentId = (nottype == "chat") ? chatUserSentId : nil
                   DashboardVC.singleEvent = (nottype == "event") ? singleEvent : nil
                   
                   return DashboardVC
               }
               
               if UserDefaults.standard.value(forKey: "session") as? String == "true" {
                   return sb.instantiateViewController(withIdentifier: "swreveal")
               }
               
               UserDefaults.standard.set("false", forKey: "session")
               return sb.instantiateViewController(withIdentifier: "register")
    
           }
           
           let nvc = UINavigationController.init(rootViewController: VC())
           nvc.isNavigationBarHidden = true
           self.window?.rootViewController = nvc
           self.window?.makeKeyAndVisible()
           
           return true
       }