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Let say here is my stack layout

View3     --> Top of the stack
View2
View1
HomeView  --> Bottom of the stack

So I am in View3 now, if I click the Home button, I want to load HomeView, meaning that I need to pop View3, View2, and View1. But if I pop View3, View2 will be displayed. I dont want that. I want View3, View2, and View1 be removed, and HomeView will be displayed. Any idea how?

Thang Pham
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3 Answers3

16

You can use popToRootViewControllerAnimated: to get to the root viewcontroller. This would pop out all the view controllers in the stack except the root view controller. In your case, this would be the HomeView.

[self popToRootViewControllerAnimated:YES];


To get to a specific view in the stack, you can use popToViewController:animated: Assuming you want to pop the third viewcontroller (from bottom up). In your case, this would be view2:

NSArray* viewControllersInStack = self.navigationController.viewControllers;
UIViewController* targetViewController = [viewControllersInStack objectAtIndex:2];
[self.navigationController popToViewController:targetViewController animated:YES];
Ronnie Liew
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  • I have homeview as root in the example, but it is not the case in my code. TYVM :) – Thang Pham Apr 07 '10 at 19:41
  • I try that, but it said `HomeView` is undefined, which make sense since I am in `View3` so I dont have reference to `HomeView`, is that right? – Thang Pham Apr 07 '10 at 19:48
  • Yes you need a reference to the `HomeView`, and you can get that via the `self.navigationController.viewControllers` property – Ronnie Liew Apr 07 '10 at 19:57
  • I try to set the reference but it does not work. Access it via any array, well it messy, since u have to keep track of the index. Would you kindly enough to post some sample code on how to do PopToViewController, with access via reference, please? – Thang Pham Apr 07 '10 at 20:42
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Use popToViewController

[self.navigationController popToViewController:homeView animated:YES];
Bird
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  • How does it work? The documentation said you pop to a specific viewController, but I keep getting seg fault. U think u can give me a quick sample code? – Thang Pham Apr 07 '10 at 19:23
  • It's pop the view until the specific viewController is on the top of the stack. Can you post an error log and some of your code as well ? – Bird Apr 07 '10 at 19:39
  • Well, let say that I am in `aViewController` (assume that it already on the stack) , I push `bViewController`, then in `bViewController`, I `popToViewController:aViewController`, well but it said `aViewController` is undefined, which make sense since I am in `bViewController` now. I dont have reference to `aViewController`. Am I missing something? – Thang Pham Apr 07 '10 at 19:44
  • That's right, as @Ronnie Liew said. You need a reference. I usually pass this job to my delegate which have references to all of the related viewcontrollers. You can do this by [Protocol](http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c). (in your case, try `informal`) – Bird Apr 07 '10 at 20:20
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use...

[self.navigationController popToRootViewControllerAnimated:YES];

user311619
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