didFinishLaunchingWithOptions Notification.swift

var actionType: String?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        
        if let push = launchOptions?[UIApplicationLaunchOptionsKey.remoteNotification] as? [String: Any] {
            
            if let notificationDict = push["aps"] as? [String: Any] {
                actionType = notificationDict["actionType"] as? String
            }
        }
        
        if #available(iOS 10, *) {
            UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .badge, .sound]) { (granted, error) in
                guard error == nil else {
                    return
                }
                
                if granted {
                    DispatchQueue.main.sync(execute: {
                        application.registerForRemoteNotifications()
                    })
                }
            }
            
            application.registerForRemoteNotifications()
        } else {
            let settings = UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
            application.registerUserNotificationSettings(settings)
            application.registerForRemoteNotifications()
        }

        return true
    }