Local Notifications make sound but do not display (Swift)

Question

I am trying to create a local notification for my app using Apple\'s UNUserNotificationCenter.

Here is my code:

let center = UNUserNotificationCenter         


        

Answer 1

Add this code into didFinishLaunchingWithOption in AppDelegate.swift file

let center = UNUserNotificationCenter.current()
center.requestAuthorization(options: [.alert, .sound]) 
{ (granted, error) in
// Enable or disable features based on authorization.
}

Answer 2

Add this Protocoal UNUserNotificationCenterDelegate. and add this delegate into your controller. and dont forget to set delegate.

UNUserNotificationCenter.current().delegate = self

func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
        print("Notification being triggered")
        //You can either present alert ,sound or increase badge while the app is in foreground too with ios 10
        //to distinguish between notifications
        if notification.request.identifier == "yourrequestid"{
            completionHandler( [.alert,.sound,.badge])
        }
    }

Answer 3

I had the same problem.

If your content body is blank ie(content.body == "") then you won't get a notification even if you do have a title.

So the solution is to make sure that your content body is not an empty string.