徽章计数未显示在 iOS 应用程序中

Question

The Badge count is not shown in my app for background and termination cases. I added this code in appdelegate didfinishlaunch

 UIApplication.shared.applicationIconBadgeNumber = 0

        if #available(iOS 10, *)
        {
            UNUserNotificationCenter.current().delegate = self
            UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .badge, .sound]) { (granted, error) in

                guard error == nil else
                {
                    return
                }
                if granted
                {
                    UIApplication.shared.registerForRemoteNotifications()
                }
            }
        }
        else
        {
            let settings : UIUserNotificationSettings = UIUserNotificationSettings(types: [.alert, .sound , .badge], categories: nil)
            UIApplication.shared.registerUserNotificationSettings(settings)
            UIApplication.shared.registerForRemoteNotifications()
        }



 UIApplication.shared.applicationIconBadgeNumber += 1
 print("Badge Count ===>   \( UIApplication.shared.applicationIconBadgeNumber)")

The print shows correct count. But not shown in the app.

Actually I dont need to update badge count for each notification. For some share or like we need to update badge count. So I created a method and update the count.

func setBadgeCount()
        {
            if(self.currentAppState() == 1 || self.currentAppState() == 3)
            {
                sleep(2)
                UIApplication.shared.applicationIconBadgeNumber += 1
                print("Badge Count ===>   \( UIApplication.shared.applicationIconBadgeNumber)")
     }
        }

callthis method from

func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void)
    {

setBadgeCount()
}

Answer 1

The app is not going to update the badge number with this method unless the app is actually open. If you want to update the badge number upon receiving a notification then you have to set the badge number in the payload of notification. Below is the sample of payload looks like. Put your desired number there and send it will work.

{
    "aps": {
        "alert": "Test Push Notification",
        "sound": "yourSound.aiff",
        "Badge": "desiredNumber"
    }
}

Answer 2

You have written this code in didFinishLaunchingWithOptions which is called only once. So how would it update badge number. Only add UIApplication.shared.applicationIconBadgeNumber = 0 in didFinishLaunchingWithOptions

Instead use,

func application(application: UIApplication, didReceiveLocalNotification notification: UILocalNotification) {

    application.applicationIconBadgeNumber = application.applicationIconBadgeNumber + 1; 
}

For push notification use,

func application(application: UIApplication,didRegisterForRemoteNotificationsWithDeviceToken deviceToken: NSData) {

    application.applicationIconBadgeNumber = application.applicationIconBadgeNumber + 1; 
}

As per your updated question, you are not getting proper badge count when app is entering background or terminating, while you are getting proper log. This is because to handle these cases we need to store badge counts somewhere. You can store it in UserDefaults and then fetch it accordingly.

Answer 3

Just go to onesignal message settings and turn on badge count