changing view controllers and memory release

[ae262]

Hi guys,

I have a very basic question - when I add a view controller as a subview, do I lose all the other instances and information on the parent view controller?

Here is my problem:

I am adding a view controller as a subview and this is performed by pressing a button. When I try to go back to the original view (controller) by removing this second view controller, I am getting an error saying message sent to a deallocated instance.

I am essentially trying to mimic NAV controller but without using those because I want to design where I want to have the back button etc.

[SundialSoft]

Can you post the code you use to show one of the sub view controllers and to remove it. You would not normally lose anything in the primary screen on which you have the buttons if you were doing it correctly.

Do you know what it is that's being sent a message after it's deallocated? Is it the sub view that's getting a message after you have exited back to the main screen perhaps? That would make more sense, perhaps a delegate that's not been set to nil.

[phani]

Originally Posted by ae262

Hi guys,

I have a very basic question - when I add a view controller as a subview, do I lose all the other instances and information on the parent view controller?

Here is my problem:

I am adding a view controller as a subview and this is performed by pressing a button. When I try to go back to the original view (controller) by removing this second view controller, I am getting an error saying message sent to a deallocated instance.

I am essentially trying to mimic NAV controller but without using those because I want to design where I want to have the back button etc.

may b u r releasing "view controller" after ur navigating into an other view...

post ur code,so that we can help u more...

[baja_yu]

For start, having a navigation controller doesn't mean you must have a navigation bar. You can hide it, and implement your own controls. So I'd suggest you rethink your approach and not try to reinvent the wheel.

Other than that it's impossible to say what exactly is the problem without seeing detailed crash logs and/or code.