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How can I know if my apps come from background or are already in foreground

I want to handle APNs differently whether my application come from background or is already in the foreground. Do you know what methods could help me ?

Solution

  • These are the messages that handle the notification about a changing application state. 

    – application:didFinishLaunchingWithOptions:
– applicationDidBecomeActive:
– applicationWillResignActive:
– applicationDidEnterBackground:
– applicationWillEnterForeground:
– applicationWillTerminate:
– applicationDidFinishLaunching:

    You must implement the one's you need in the designated Delegate! Take a look at the "Task" section of the following link for further assistance, especially the "Monitoring application state changes" part ;-)

    Apple's UIApplicationDelegate Protocol Reference