So far I've found that I can't increment the app badge number through local notifications. So doing something like this:
self.notification.applicationIconBadgeNumber = [[UIApplication sharedApplication] applicationIconBadgeNumber]+1;
won't really work.
If I say for example the applicationIconBadgeNumber
to be 7, it surely becomes 7, but if I set it like I'm doing over there, it just won't work.