Increase Badge Count From Client side not from Payload Receive count

Question

I am working on application that receives notification and set application badge.
The problem is that when the application is in background state or terminated, the badge count isn't increased.
It remains same.

While when app is in foreground method calls and badge count increased.
I already did that thing from server side,

but I want to know that Is there any method that execute when app is in background or terminated for increasing application badge number?

I already told you I have done this thing as

{
    "aps" : {
        "alert" : "You got your emails.",
        "badge" : 9
    }
}

from server side but what I want is :I dont want to receive that badge count from server payload but I want to increase badge count from my side.

My logic is like that when I receive first notification I saved count in userdeafualts in didReceiveNotification and when I second notification I added count with +1 and when app is in foreground I directly change that badge count as 0 in userdefaults BUT THIS METHOD CANT WORK IN BACKGROUND OR APP TERMINATED

SO I WANT TO KNOW IF THERE IS ANY METHOD THAT EXECUTES IN BACKGROUND OR APP IS TERMINATED SO I CAN INCREASE BADGE COUNT

If anyone knows please help me do it from my side.

Answer 1

Use application(_:didReceiveRemoteNotification:fetchCompletionHandler:) of UIApplicationDelegate. System wakes up your app, if you enabled the remote notifications background mode. For more info check the documentation for this method