How to Unload a popped view controller?

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How to Unload a popped view controller?

Using a navigation based view hierarchy. I have a root view controller, and multiple view controllers that branch out from the same when a button is pressed. When a user presses the back button on the UINavigationBar, the current viewcontroller is popped and the display animates back to the rootviewcontroller.

The problem is, I want the viewcontrollers to UNLOAD whenever they are popped. Seems like they are not unloading because when I go back to them they are still in the state they were when they were popped.

How do I unload the viewcontrollers after navigating back to the rootviewcontroller?

-viewUnload is called after the application receives low-memory notification.

It is the default implementation of -didReceiveMemoryWarning that calls -viewUnload.

What you probably want to do is put what you want to do into -viewDidDisappear based on what you've described.

Giao 2010-01-31 07:18:39

Ok so in -viewDidDissapear i should put something like [self dealloc]? Or what about this, in the rootviewcontroller, putting something like if(self.viewControllerOne !=nil){ self.viewControllerOne = nil;} ??

RexOnRoids 2010-01-31 07:35:42

You shouldn't call dealloc manually. -dealloc is handled by the runtime. Release whatever you need to release in -viewDidDisappear.

Giao 2010-01-31 07:39:52

What about the 'nil' suggestion I said?

RexOnRoids 2010-01-31 07:42:08

That doesn't guarantee that will do what you want it to do.

Giao 2010-01-31 08:17:21

It seemed to do the trick. I just am worried that it may cause probs later on down the line.

RexOnRoids 2010-01-31 08:17:52

what exactly do you want?

Rahul Vyas 2010-01-31 10:57:37

in -viewDidDisappear why not [self release]; just need to make sure you have a lazy loader so it will load back when needed.

Matt 2010-03-19 23:06:53

ansaurus

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How to Unload a popped view controller?

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