How do I call a function immediately upon an iPhone app resuming from a saved state?

Question

1. User has my app open.
2. They hit the home button, resulting in my app closing and going into a "saved state".
3. Users uses his device for other things.
4. User opens up my app again, resuming from where he left off.

How, in my code, do I detect that the user has resumed from the saved state? Is there a specific iOS4 multitasking NSNotification that I can attach to?

Answer 1

Implement applicationDidBecomeActive: in your app delegate.

See also:

• applicationWillEnterForeground vs. applicationDidBecomeActive, applicationWillResignActive vs. applicationDidEnterBackground
• Handling applicationDidBecomeActive - "How can a view controller respond to the app becoming Active?"