How to do badge increment on iOS push notification

Question

I'm currently getting badge from payload. But how can i update that value.

{"aps":
    {"alert":"Notification Hub test notification2",
     "badge":1,
     "sound":"Default"}
}

when i send this it is always shows 1 in the badge number but when i go inside app and exit it's getting updated.It is because of this,

func applicationDidBecomeActive(application: UIApplication) {
        UIApplication.sharedApplication().applicationIconBadgeNumber = UIApplication.sharedApplication().applicationIconBadgeNumber + 1
    }

But when i send a new push notification it's again shows 1 as badge number in the icon. How should i do this, to my understand i should send updated badge when i send the payload. For that i have to deal with backend.

Is there any suggestion other than this to handle inside app?

Answer 1

If your project has a notification extension, you can do a badge setting inside it.

First of all, enable App Groups and save your badge count from the app notification service extension in UserDefaults. We are using app groups because we need to clear the badge count from AppDelegate when opening the app. Also you can set value of badge as bestAttemptContent.badge from notification service extension

In notification service extension:

if let userDefaults = UserDefaults(suiteName: "group.com.bundle.appname") {
    
    let badgeCount = userDefaults.integer(forKey: "badgeCount")
    if badgeCount > 0 {
        userDefaults.set(badgeCount + 1, forKey: "badgeCount")
        bestAttemptContent.badge = badgeCount + 1 as NSNumber
    } else {
        
        userDefaults.set(1, forKey: "badgeCount")
        bestAttemptContent.badge = 1
    }
}

In AppDelegate you can clear badge...and set value for the badge as zero on userdefaults

if let userDefaults = UserDefaults(suiteName: "group.com.bundle.appname") {
    userDefaults.set(0, forKey:"badgeCount") // "change "badgecount" to be "badgeCount"
}
UIApplication.shared.applicationIconBadgeNumber = 0