Badge on App Icon on iOS

[Richard-Dufour]

I cancelled and cleared all my requests, yet the badge number (1) on my iPad always shows up. Even after deleting the app and re-installing it. It is stuck. I no longer have any notifications yet the badge number shows up on my app icon.

The notification clears successfully from the Notification Center, but I still have the badge number on the App icon.

Weird thing is that when I add new requests, the badge number is updated, when I delete requests, once I get to zero, I still see 1.

Also...
Shouldn't the badge number property be part of Current instead of a Request? I mean, the badge is shown on a single app icon (we only see 1 icon displayed, so shouldn't the badge number always be the total number of notification requests? Feels like that property should not even have to be editable, it should just be a read only property that equals:

var current.BadgeNumber = await LocalNotificationCenter.Current.GetDeliveredNotificationList();

I am suspecting there is a bug in a loop of some sort that doesn't clear all the way down to zero.

Ex:
Every time I add a request, I set the BadgeNumber to be the count of await LocalNotificationCenter.Current.GetDeliveredNotificationList();

So add1-> BadgeNumber = 1
Add one more -> BadgeNumber = 2
Add one more -> BadgeNumber = 3

Now, cancel a notification -> BadgeNumber goes to to 2
Cancel another -> BadgeNumber goes to 1
Cancel the last one, -> Badge number is stuck on 1, even weider, sometimes goes back up to 2??

How can I clear the app icon badge once I have removed all my notifications?

Running on Visual Studio 2022 Preview on a Windows 11 machine
Targeted device is an iPad 10th Generation

[Richard-Dufour]

UPDATE:
I found a work around to get the darn iOS app icon to set/clear out.

using System;

public static async void RefreshBadge()
 {
     //Called on MainPage OnAppearing and also when I click/tap on a notification
     var delivered = await LocalNotificationCenter.Current.GetDeliveredNotificationList();
     int newBadgeNumber = delivered.Count();

     //They all should have the same BadgeNumber -> The overall total number of notifications
     for (int i = delivered.Count - 1; i >= 0; i--)
     {
         var deliveredNotification = delivered[i];
         deliveredNotification.BadgeNumber = newBadgeNumber;
     }

     // Badge comes from using system, it is needed (at least on iOS) to set/clear the Badge number properly on my iPad
     Badge.Default.SetCount((uint)newBadgeNumber);
     Badge.SetCount((uint)newBadgeNumber);
 }

private void ClearAppBadgeCount()
{
    Badge.Default.SetCount(0);
    Badge.SetCount(0);
}

[bnSonic]

UPDATE: I found a work around to get the darn iOS app icon to set/clear out.

using System;

public static async void RefreshBadge()
 {
[…]
     // Badge comes from using system, it is needed (at least on iOS) to set/clear the Badge number properly on my iPad
     Badge.Default.SetCount((uint)newBadgeNumber);
     Badge.SetCount((uint)newBadgeNumber);
 }

I've tried your code but i don't have the Badge-Class, so it's not in "using System"
Could it be, that you are using the Maui Community Toolkit?

[Richard-Dufour]

Correct, Badge is in CommunityToolkit.Maui.ApplicationModel

[bnSonic]

Because i don't like to install / use the CommumityToolkit just to set the Badge, i created a tiny class like "NotificationHelper" and put something like this into it:

    public static void ClearBadge()
    {
#if IOS
        
        if (UIDevice.CurrentDevice.CheckSystemVersion(16, 0))
        {
            UNUserNotificationCenter.Current.SetBadgeCount(0, null);
        }
        else 
        {
            UIApplication.SharedApplication.ApplicationIconBadgeNumber = 0;
        }
#endif
    }

In my case i only need to reset/clear the Badge and this works fine.

Richards Code to update the Badge is a clever idea if you have multiple Notifications and need to update the counter … That would work with my platform specific approach too… just take Richards solution and replace the Badge Class with some platform specific code or a call to you own static helper :)

Thank you Richard for this thread that put me in the right direction