Add Local Notification in iOS 10 - Swift 3

Question

So I been trying to add a notification to the new UNUserNotificationCenter, but I don't seem to get it.

My view controller has an action:

@IBAction func sendPressed(_ sender: AnyObject) {
    let content = UNMutableNotificationContent()

    content.title = "Hello"
    content.body = "What up?"
    content.sound = UNNotificationSound.default()

    // Deliver the notification in five seconds.
    let trigger = UNTimeIntervalNotificationTrigger.init(timeInterval: 5, repeats: false)
    let request = UNNotificationRequest.init(identifier: "FiveSecond", content: content, trigger: trigger)

    // Schedule the notification.
    let center = UNUserNotificationCenter.current()
    center.add(request) { (error) in
        print(error)
    }
    print("should have been added")
}

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)

    let center = UNUserNotificationCenter.current()
    center.requestAuthorization([.alert, .sound]) { (granted, error) in
    }
}

And I have a Notification Content Extension in the project as well, but it does not seem to be triggered at all, any ideas what I'm missing? I'm trying the example from the user documentation, but it's not telling me much more or I have missed it.

Here: https://developer.apple.com/reference/usernotifications/unmutablenotificationcontent

Also: https://developer.apple.com/reference/usernotificationsui https://developer.apple.com/reference/usernotifications

Edit:

So putting the app in the background did the trick.

Answer 1

You need to register for Notification...I tried and this works.

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        // Override point for customization after application launch.
        let center = UNUserNotificationCenter.current()
        center.requestAuthorization([.alert, .sound]) { (granted, error) in
            // Enable or disable features based on authorization.
        }
        return true
    }

Edit: You dont need to put your app in background to present notification from iOS 10 onwards.

Use below callback to configure notification to present in foreground.

func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void)

Here is a sample project.