[Advice Needed] How to reload/restart a ViewController?

Guys,
I'm still new to Object-C/iPhone programming so please bare with me. I'll try and explain my problem.
I have a main ViewController (homescreen) with links to two other View Controllers (lets say Display & Settings).
The Display screen loads a view and displays buttons, either at the top of screen or bottom.
The Settings screen allows the user to choose where to display the buttons (either top of bottom).
My problem is as follows:
1) The user starts the program and goes in the Display screen (buttons displayed at top).
2) They go back to homescreen and into Settings - change buttons to display at bottom.
3) They go back to homescreen and into Display - The buttons are still at the top
Note: A restart to the application fixes the problem.
My questions are:
Could someone please explain what's actually happening?
What's being stored in memory and when?
Could I somehow release the Display ViewController when going back to the homescreen?
Is there a way to achieve the refresh so that it displays the correct information, without having to exit the app?
Sorry for all the questions, like I said above, I'm still new to all this and would appreciate some guidance.
Thanks

My guess is that you create the Display screen view controller and hang onto it.
When you go back to the Home Screen from the Display screen the Display screen gets popped off. The Navigation controller would call a release on it. If you are holding on to the Display screen then it wont be dealloc'd.
After you push the Display screen onto the Navigation controller, call a release on the Display view controller. This will ensure that when you hit Back on the Display screen to the HomeScreen the display screen will be dealloc'd. So the next time you come you want to go to the Display screen from the Home Screen you create a new instance of the Display Screen view controller and pop it onto the stack. This will call the loadView (if you are not using IB) or initWithNibName (if you are using IB) where you can re-layout the view.
If you want to hold on to the Display Screen without having to constantly create a new one then you may want to try to override viewWillAppear method of UIViewController where you can take change the layout if required.
Hope this helps.
-TRS

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[Advice Needed] How to reload/restart a ViewController?

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