back button at root controller of uinavigationcontroller - iphone

Question

I have a UINavigationController application with a root view controller and each time I am pushing a view controller to the stack. Let's say the stack is A B C D where A is the root view controller here. The issue is that when I am at view controller D and do a popToRootViewController it went back to A but A has a back button on it. When I click on back the back just slides in and disappear, why is this happening?
EDIT: I am actually subclassing my UINavigationController so that I can set my rootViewController as follows:
#import "CustomNavigationController.h"
#implementation CustomNavigationController
#synthesize fakeRootViewController;
//override to remove fake root controller
-(NSArray *)viewControllers {
NSArray *viewControllers = [super viewControllers];
if (viewControllers != nil && viewControllers.count > 0) {
NSMutableArray *array = [NSMutableArray arrayWithArray:viewControllers];
[array removeObjectAtIndex:0];
return array; }
return viewControllers; }
//override so it pops to the perceived root
- (NSArray *)popToRootViewControllerAnimated:(BOOL)animated {
//we use index 0 because we overrided “viewControllers”
((UIViewController *)[self.viewControllers objectAtIndex:0]).navigationItem.hidesBackButton = YES;
return [self popToViewController:[self.viewControllers objectAtIndex:0] animated:animated]; }
//this is the new method that lets you set the perceived root, the previous one will be popped (released)
-(void)setRootViewController:(UIViewController *)rootViewController {
rootViewController.navigationItem.hidesBackButton = YES;
[self popToViewController:fakeRootViewController animated:NO];
[self pushViewController:rootViewController animated:NO]; }
- (void)dealloc {
self.fakeRootViewController = nil;
[super dealloc]; }
-(id)initWithCoder:(NSCoder *)aDecoder{
self = [super initWithCoder:aDecoder];
if(self){
UIViewController *fakeController = [[[UIViewController alloc] init] autorelease];
self.fakeRootViewController = fakeController;
NSMutableArray *array = [NSMutableArray arrayWithArray:[super viewControllers]];
[array insertObject:fakeController atIndex:0];
self.viewControllers = array;
}
return self; }
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use. }
#pragma mark - View lifecycle
/* // Implement loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView { }
*/
/* // Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad]; }
*/
- (void)viewDidUnload {
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil; }
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait); }
#end
MORE UPDATE:
So after I set my rootViewController and then push a viewController and then tried to call popToRootViewController from that view, it all worked fine. However, if I push another viewController after the second one and then call the popToRootViewController, now I can see that weird back button on the root.

Answer 1

I too face the same problem. So in your root controller assign leftBarButtonItem equal to nil.
self.navigationItem.leftBarButtonItem = nil;
If your root controller reusing in the program. Then you need to check ->
BOOL needBackBarButton = (1 < [self.navigationController.viewControllers count]) ? YES : NO ;
if (! needBackBarButton)
{
self.navigationItem.leftBarButtonItem = nil;
}
For other controllers
if (needBackBarButton)
{
// Create custom navigationItem here.
}
else
{
self.navigationItem.leftBarButtonItem = nil;
}