Reputation:
I am new to coding objective-C and am trying to use pop to viewController
. To do this when a button is tapped i use
[self.navigationController popToViewController:(what goes here) animated:YES];
I know its a UIViewController*
that goes there but I am wondering where do I declare this and what code would I use to declare it.
My basic storyboard is I have 4 view controller A,B,C,D and A is the root which pushed to B which pushes to C which pushes to D, my button is on D and I am trying to pop back to B. The object at index method won't work because its doesn't always go A->B->C->D
sometimes it goes A->C->B->D
so
[self.navigationController popToViewController: [self.navigationController.viewControllers objectAtIndex:2] animated:YES];
So that doesn't work.
Thanks for the help in advance. Sorry if this question is too basic.
Upvotes: 1
Views: 1712
Reputation: 10739
Personally I don't find this as a basic question, even I got struck in such a situation. But I found a good solution by using “Mediator Design pattern” and develop my custom UINavigationController as a coordinator by combining the method:
- (void)setViewControllers:(NSArray *)viewControllers animated:(BOOL)animated
and maintaining my own navigation stack.
A coordinator (your custom UINavigationController) has to have the control over your navigation, if your are having unpredictable way of navigation.
Upvotes: 0
Reputation: 10818
You need a way to find the desired view controller to pop to.
-(IBAction)popToDesiredViewController:(id)sender
{
UIViewController *desiredVC = nil;
// LOOK AT ALL VIEW CONTROLLERS IN NAVIGATION CONTROLLER
for (UIViewController *oneVC in self.navigationController.viewControllers) {
// CHECK IF THIS IS THE VIEW CONTROLLER YOU WANT
// change this to your logic
BOOL foundDesiredVC = [oneVC isKindOfClass: [SignInVC class]];
if (foundDesiredVC) {
desiredVC = oneVC;
break;
}
}
[self.navigationController popToViewController:desiredVC animated:YES];
}
Upvotes: 1