Push notification in Background works fine when App runs by Xcode, but does not work when App runs by itself.

Did you register for notifications ?

Could read this:

https://stackoverflow.com/questions/31450403/didreceiveremotenotification-not-working-in-the-background

Thank you for your response.

I did register like below;

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        let center = UNUserNotificationCenter.current()
        center.delegate = self 
        center.requestAuthorization(options: [.alert, .badge, .sound]) { (granted, error) in
            if granted {
                DispatchQueue.main.async {
                    UIApplication.shared.registerForRemoteNotifications()
                }
            } else {
                print(error?.localizedDescription as Any)
            }
        }
}

Do you see any problem?

Should look at this tutorial for the complete notification set up.

https://developer.apple.com/library/archive/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/HandlingRemoteNotifications.html

or

https://stackoverflow.com/questions/37956482/registering-for-push-notifications-in-xcode-8-swift-3-0

looks like you've seen it already.

https://stackoverflow.com/questions/37956482/registering-for-push-notifications-in-xcode-8-swift-3-0Note: you don't return true from didFinishLaunching, probably because you did not copy the complete func ?

Thank you for your response.

I will review the site you described.

> Note: you don't return true from didFinishLaunching,

I return "true" from didFinishLaunching. Do you mean I should return "false"?

> probably because you did not copy the complete func ?

What function(s) do I miss in didFinishLaunching?

I appreciate your kind advice.

No, I just meant I did not see return true in the func code. true is OK.

What I note in Apple code is that they register in all cases

    // Register with APNs
    UIApplication.shared.registerForRemoteNotifications()

Oh, OK.

Yes, I rerurn "true".

So, what do you think the reason that push notification does not call that function in Backgroiund?

It works fine if I use Xcode to RUN the app, but not work if I tap the app icon on my iPhone display and do the same operation.

Additional information.

The banner of push notification is correctly displayed on the screen, but "didReceiveRemoteNotification userInfo:" is not called. That is the problem. Only in Background. It works fine in Foreground and when removed from background.

What happens if you remove the dispatch (yes, I know they advise to use in in SO…)

i have a very simular problem. my Apps are running fine when i start them from Xcode on a device, running the App from Testflight always causes a crash on the very first screen and the app stops running.

In Xcode 11.2.1 my Capability Menue doesnt show "Background Tasks".

I tried, but still same symptom.

Thank you for your advice, anyway.

I am using Xcode 10.3.

Not sure if this relates. but I found out that when you run from Xcode (connected to Mac), it prevents app to go to Suspend. But without Xcode, the app can go to Suspend.