My app has notification feature. When I receive a notification I show a badge in my app icon.
As I know, when my app is on background, since user does not clicks on the notification at notification center, my app does not know that it has a notification. So it can not change the badge number.
Also from this topic:
Detect when a user clears notification from the notification center
If user clears the app's notification, the app can not detect it.
So the problem is here:
- My app is on background
- User receives a notification related to the app
- App adds a badge with number 1 to the app's icon
- User deletes the notification from notification center
- App never understands that notification has been removed so that it can remove the badge!!!
So how other apps fix this problem? Is there any solution for this?
There is no way to check when the user clears notifications for your app.
The usual practice for clearing the app badge is when the user has viewed the applicable content within your app (e.g. messages in a messaging app), or otherwise just clearing the badge the next time the user opens your app if this is not applicable, or you can't easily segment the notifications and connect them to viewable content in your app.
Note: you should not be relying on the user tapping on your notifications in order to get their content. If your user doesn't tap your notification, your app has no way of ever finding out its content, or that it ever existed.
Instead, when your app is opened, it should connect to your server to download updated content, then you can use this complete, accurate information to update your app badge as required. Do not try to fetch content from your notifications.
You can add custom action to your notification: "Mark as read" or "Delete". Remove badge in -application:handleActionWithIdentifier:... method.
Yes, it doesn't allow you to detect user cleans the notification. But there is no any way to do it. So I suggest a workaround to solve this problem.
