iPhone Passcode Entry Points

I've written a passcode system for my iPhone app, and currently have it working perfectly in the -applicationDidFinishLaunching method, but I was wondering what are the other methods I have to override to account for things like sleep,开发者_如何学Python and multitasking?

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For the app delegate, probably

- (void)applicationDidBecomeActive:(UIApplication *)application;

and

- (void)applicationWillEnterForeground:(UIApplication *)application;

You might also want to use:

- (void)applicationSignificantTimeChange:(UIApplication *)application;

I think that covers it, though.