How do I tell if my iPhone app is running when a Push Notification is received?

Question

I am sending Push Notifications to my iPhone app, and I\'d like a different set of instructions to execute depending on whether the app is already launched or not. I\'m new

Answer 1

If you are going to check applicationState on iOS less than 4, you'll need to check that applicationState is supported:

if ([application respondsToSelector:@selector(applicationState)] ){
  // Safe to check applicationState
  UIApplicationState state = [application applicationState];
}