APNS Background handling for badge counter

Question

I am integrated APNS in my app, The requirement is to maintain notification count when app in background. For example we got notification in background in there is key counter count , i,e changing dynamic in every notification, Can it possible to handle in iOS when app is background or app has forcefully closed.

Answer 1

This is the APNS payload from back end server.

{
    "aps" : {
        "alert" : "You got your emails.",
        "badge" : 9,
        "sound" : "bingbong.aiff"
    },
    "acme1" : "bar",
    "acme2" : 42
}

1. The value for key badge is automatically considered as badge count.On ios app side no need to calculate or handle the count.
2. In above example 9 is the badge count.So your app icon will show 9.
3. NOTE While your app is close u can't handle badges on your own.Thats why we are using badge key from APNS Payload
4. For better clarification about notification see documentation

EDIT: if you want to reduce the badge count on your own.Decrement the count and update it yourself.as follows

NSInteger numberOfBadges = [UIApplication sharedApplication].applicationIconBadgeNumber
numberOfBadges -=1;

[[UIApplication sharedApplication] setApplicationIconBadgeNumber:numberOfBadges];

or else make the count to 0, so that badge icon will be disappeared.Add the below code in ** applicationDidBecomeActive**

application.applicationIconBadgeNumber = 0;