iOS Simple View Pop from Navigation Stack Error - ios

Question

My storyboard looks like the following:
What I'm trying to achieve is when "Click Me" is pressed on the home page, to segue to "One" , check some logic on this controller, if successful, automatically segue to "Two".
Then when the "Back" button is pressed on "Two" it would take the user back home, essentially popping "One" off the stack.
Below is what my "One" controller looks like:
#implementation OneViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// example logic, in this case just force them to view two
if(1 == 1)
{
[self.navigationController popViewControllerAnimated:NO];
TwoViewController *vc = [self.storyboard instantiateViewControllerWithIdentifier:#"two"];
[self.navigationController pushViewController:vc animated:YES];
}
}
#end
I'm getting strange behavior and receiving the following error:
Finishing up a navigation transition in an unexpected state.
Navigation Bar subview tree might get corrupted.
I can't seem to figure out what I'm doing wrong. I've included the full dead simple source: http://andrewherrick.com/spike/pushpop.zip
EDIT:
I've tried moving the logic to ViewDidAppear and it simply kicks me back to the "Home" view automatically which isn't what I want.
- (void)viewDidLoad
{
[super viewDidLoad];
}
-(void)viewDidAppear:(BOOL)animated {
// example logic, in this case just force them to view two
if(1 == 1)
{
[self.navigationController popViewControllerAnimated:NO];
TwoViewController *vc = [self.storyboard instantiateViewControllerWithIdentifier:#"two"];
[self.navigationController pushViewController:vc animated:NO];
}
}

Answer 1

Putting your second push logic in viewDidAppear: rather than viewDidLoad solved the problem for me.
You should also consider the UX of your app. If a viewController is being used only for a few seconds to process some data and automatically segues into another viewController, it would be better practice to show a UIActivityIndicator or a small visual indicator.
EDIT:
Your automatic push should not pop itself before pushing another.
- (void)viewDidAppear:(BOOL)animated
{
if(1 == 1)
{
TwoViewController *vc = [self.storyboard instantiateViewControllerWithIdentifier:#"two"];
[self.navigationController pushViewController:vc animated:YES];
}
}
Then in your TwoViewController you need to programmatically call
[self.navigationController popToRootViewControllerAnimated:YES];
in order to pop back to your Main viewController.