iphone push notification badge number increment

Question

How to increment the badge number and how to know whether the user opens the notifications.so v could know whether to increment the badge no or to start from the beginning(as 1).

here

alertNotification.Payload.Badge = 1;

Answer 1

You cannot increment or decrement badge number using push-notifications. You can only set NEW value !

You can know current badge value only if your application is now running.

If you extremely want to add such feature you should store current user's badge value at your server and send appropriate value with your push-notification.

PS It's very strange that Apple didn't think about it when they were developing badge numbers and push-notifications. =(