[UINavigationController popViewControllerAnimated:NO] doesn't release controller?

Question

I have one UINavigationController that I use like this:

DetailsViewController *controller = [DetailsViewController alloc] init];
[self.navigationController pushViewController:controller animated:YES];
[controller release];

Of course this code works well.

The problem: when I send the popViewControllerAnimated: to the UINavigationController, the DetailsViewController it is removed from the stack, but it is not released if there is no animation occurring. (That is, dealloc is not called, and the DetailsViewController remains with a retainCount of 1).

Does anyone have any idea of what's happening here? Is the animated parameter being used improperly?

Answer 1

If the main problem are the observed notifications, why not remove the observers in the "-(void)viewWillDisappear:(BOOL)animated" - method?

Answer 2

what Dshutsi suggests is right. If you want the notifications to be removed, that is better called in the viewDidUnload method of the controller. This method is called when the controller is unloaded from the stack. I am just quoting this because we cannot vote up the comment as an answer.