How can I see lastest subView after clicking popover embedded in NavigationView? - iphone

Question

When click button, a popoverView embedded in NavigationView appear.
My code is as follows:
-(IBAction)myStuffPOP:(id)sender
{
if(myStuffListViewController ==nil)
{
myStuffListViewController = [[MyStuffListViewController alloc] init];
}
UINavigationController *navcontroller=[[[UINavigationController alloc] initWithRootViewController:myStuffListViewController] autorelease];
// Here we create popover controller.
mystuffPopoverView = [[UIPopoverController alloc] initWithContentViewController:navcontroller] ;
CGRect popoverRect = [self.view convertRect:[sender frame] fromView:[sender superview]];
popoverRect.size.width = MIN(popoverRect.size.width, 100);
popoverRect.size.height = 40;
[mystuffPopoverView presentPopoverFromRect:popoverRect inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];
[navcontroller setNavigationBarHidden:NO];
}
In NavigationView of PopoverView :
1st subView ---> 2nd SubView ---> 3rd Subview
If I touch 3rd SubView, PopoverView disappears.
My Question is :
When I click button again, I wanna to see lastest View - 3rd SubView not 1st SubView.

Answer 1

Declare UINavigationController *navcontroller; in .h file
Create only onсe navcontroller with your root view controller,
in viewDidLoad method, for example.
- (void)viewDidLoad {
myStuffListViewController = [[MyStuffListViewController alloc] init];
navcontroller=[[UINavigationController alloc] initWithRootViewController:myStuffListViewController]; }
Show UIPopoverController with exist navigation stack
-(IBAction)myStuffPOP:(id)sender {
//Here we create popover controller.
mystuffPopoverView = [[UIPopoverController alloc] initWithContentViewController:navcontroller] ;
CGRect popoverRect = [self.view convertRect:[sender frame] fromView:[sender superview]];
popoverRect.size.width = MIN(popoverRect.size.width, 100);
popoverRect.size.height = 40;
[mystuffPopoverView presentPopoverFromRect:popoverRect inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp
animated:YES];
[navcontroller setNavigationBarHidden:NO]; }
Don't forget to release objects
- (void)dealloc {
[myStuffListViewController release];
[navcontroller release];
}

Answer 2

No need to create UINavigationController every time. Save it the same way as MyStuffListViewController
if ( myNavigationController == nil )
myNavigationController = [[[UINavigationController alloc] initWithRootViewController:myStuffListViewController] autorelease];