func application(_ application: UIApplication, didRegister notificationSettings: UIUserNotificationSettings) {

        if notificationSettings.types == .none {
            print("通知を不許可")
        } else {
            //.badge / .sound / .alert
            print("通知を許可")
        }
    }

@available(iOS 10.0, *)
public enum UNAuthorizationStatus : Int {


    // The user has not yet made a choice regarding whether the application may post user notifications.
    case notDetermined


    // The application is not authorized to post user notifications.
    case denied


    // The application is authorized to post user notifications.
    case authorized
}

        UNUserNotificationCenter.current().getNotificationSettings { (settings) in

            switch settings.authorizationStatus {
            case .authorized:
                break
            case .denied:
                break
            case .notDetermined:
                break
            }
        }

@available(iOS 10.0, *)
public enum UNNotificationSetting : Int {

    // The application does not support this notification type
    case notSupported


    // The notification setting is turned off.
    case disabled


    // The notification setting is turned on.
    case enabled
}

        UNUserNotificationCenter.current().getNotificationSettings { (settings) in

            switch settings.notificationCenterSetting {
            case .enabled:
                break
            case .disabled:
                break
            case .notSupported:
                break
            }
        }

@available(iOS 10.0, *)
public enum UNAlertStyle : Int {

    case none

    case banner

    case alert
}

        UNUserNotificationCenter.current().getNotificationSettings { (settings) in

            switch settings.alertStyle {
            case .none:
                break
            case .banner:
                break
            case .alert:
                break
            }
        }