Push-Notification Badge auto increment

user_126392 0
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I've been implementing the push service to my application, and I've been thinking about the application's badge. My app is a mail app (sorta) and I want to notify the user via push for new messages added to the inbox, I want the badge = number of new messages in the inbox.

I thought of doing it server sided (provider) checking for new messages and sending the number as the badge.

The question is: Is there a way to auto-increment the application's badge, without having to calculate the badge value server sided and afterwards sending it as a part of the push payload to the APSN?

Maybe there's a way to send in JSON badge field some variable like "++" or something like that. Any hack for that? Or do I need to go with the counting system server-sided??

push-notification iphone-sdk-3.0 objective-c iphone
5 Answers

Nope, you'll have to track this on the server side. If you don't include any value for badge, it will get removed completely.

Of course though this is only if the user receives the notification and the app isn't running/they choose not to launch it. If the user launches the app or already had it running you can do whatever you want in regards to incrementing.

UPDATE March 2014: See comments for a possible update. I haven't done pushes in several years so haven't been able to verify this myself.

user_5430

It's sort of possible but there's a trade-off.

You can always send up the unread total as an add-on JSON value as part of the push payload (push ignores keys it doesn't explicitly understand). Once the user opens the app, read the value and adjust the badge programmatically yourself via UIApplication's applicationIconBadgeNumber property.

The problem with doing it that way is that push adjusts the badge value even if the user doesn't open the app (i.e. when they get the notice and the user hits 'Cancel' instead of 'View'). In those cases your badge won't change, but as soon as they run the app (if they hit 'View') then your app can set it right.

user_89190

It is now possible to have the client auto-increment the badge using a UNNotificationServiceExtension.

Extensions have the ability to modify notification payloads before iOS displays them. In summary, store a badge counter in UserDefaults and modify the notification's badge count as needed. You'll need to add the App Groups capability to share User Defaults.

Here's a detailed step-by-step guide: https://prodocs.cometchat.com/docs/ios-increment-app-icon-badge-count

user_3430340
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