Calling poptoviewcontroller function from a viewcontroller - iphone

Question

Let me explain clearly.
I have a tabbarcontoller in the viewcontroller which is the main view controller of the single view application project.
I added a tabbarcontroller to the viewcontroller as the subview. In the tabbarcontroller, I added two navigation controllers like below image,
I have added three(named First, Second, Third) more viewcontrollers as new file.
If I navigate from one viewcontroller to other in a tab using below,
third = [[Third alloc] initWithNibName:#"Third" bundle:[NSBundle mainBundle]];
[self.navigationController pushViewController:third animated:YES];
If I switch to next tab and come back to the previous tab, it should popto the previous view controller, how to do this?
I tried
- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController
{
[self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:0] animated:YES];
}
not succeed,
I also tried,
[third popto];
In the third viewcontroller,
-(void)popto
{
[self.navigationController popViewControllerAnimated:YES];
}
nothing happened.
Now, I have to click the tab again to poptoviewcontroller to the first viewcontroller.
Any ideas will be highly appreciated.

Answer 1

You should try using
[viewController.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:0] animated:YES];
instead of
[self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:0] animated:YES];

Answer 2

Try the below code snippet
-(BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController
{
UINavigationController *navController = (UINavigationController*)viewController;
if (navController && ([[navController viewControllers] count] > 0))
{
[navController popToRootViewControllerAnimated:NO];
}
return YES;
}
Hope it may work for you.

Answer 3

How about overriding UITabbarController for a custom one and implement the following method:
- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController;
Next loop trough all the 'viewcontrollers' of the tabbar (in this case the navigation controllers) and call on all the navigation controllers popToRootViewController.
This might work.