How to pop from one view controller to another view controller

Question

Using iOS I Have 15 ViewControllers now I want to pop from one ViewController to another View Controller.

I am using this code:

SecondViewController *Sec=[SecondViewController alloc]init];
[self.navigationController popViewController:Sec animated:YES];

This shows error this ViewController not exist and then I am using this code:

NSArray *array = [self.navigationController viewControllers];
[self.navigationController popToViewController:[array objectAtIndex:1] animated:YES];

This code is right to pop from thirdViewController to secondViewController. But What happened when we pop from Ninth(9th)ViewController to Fifth(5th)ViewController then I am using this code in Ninth(9th)ViewController:

NSArray *array = [self.navigationController viewControllers];
[self.navigationController popToViewController:[array objectAtIndex:4] animated:YES];

It does not pop from Ninth(9th)ViewController to Fifth(5th)ViewController apart that it pops Ninth(9th)ViewController to Eight(8th)ViewController. I don't know what happened when we use this line:

NSArray *array = [self.navigationController viewControllers];
NsLog(@"array = %@",array);

When we use this in Ninth(9th)ViewController. NsLog shows:

array=   First(1st)ViewController;  
         Second(2nd)ViewController;
         Eight(8th)ViewController;
         Ninth(9th)ViewController;

I don't know why only Four View Controllers show. Whenever I am using 15 View Controllers. This problem occurs in each view controller. For instance if I am Using pop form fifteenth(15th)ViewController to Fifth(5th)ViewController then same problem manifests.

NSArray *array = [self.navigationController viewControllers];
NsLog(@"array = %@",array);

array=     First(1st)ViewController;  
           Second(2nd)ViewController;
           fourteenth(14th)ViewController;
           fifteenth(15th)ViewController;

I want to count Number of ViewControllers and then pop to specific ViewController.

Answer 1

You can't pop to a new view controller (like you do with your secondViewController example).

When using a UINavigationController you

Add Controller to the stack with:

[self.navigationController pushViewController:<yournewViewController> animated:YES];

Pop to the previous one with :

[self.navigationController popViewControllerAnimated:YES];

Pop to a previous controller in the stack (Must have been pushed before) :

[self.navigationController popToViewController:<ViewControllerToPopTo> animated:YES];

Go back to the root Controller with

[self.navigationController popToRootViewControllerAnimated:YES];