watchOS Notifications - Part 1

let center = UNUserNotificationCenter.current()
center.requestAuthorization(options: [.alert, .sound]) { (granted, error) in
    if granted {
        let category = UNNotificationCategory(identifier: "BeerButtonOrderDelivery", actions: [], intentIdentifiers: [], options: [])
        center.setNotificationCategories(Set([category]))
    } else {
        print("No permission" + error.debugDescription)
    }
}

let center = UNUserNotificationCenter.current()
center.delegate = self
center.getNotificationSettings { (settings) in
    if settings.authorizationStatus == .notDetermined {
        // user has not seen apple notification authorization prompt
    }
}

func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
    // this shows the notification, alternatively you could change app state based on the notification or ignore the notification
    completionHandler([.alert, .sound])
}