Removing ViewController from navigation stack - ios

Question

I do it with code:
NSArray *viewControllersFromStack = [self.navigationController viewControllers];
NSMutableArray *viewControllersFromStackMutable = [NSMutableArray arrayWithArray:viewControllersFromStack];
NSMutableArray *viewControllersToRemove = [[NSMutableArray alloc]init];
for (UIViewController *currentVC in viewControllersFromStack)
{
if ([currentVC isKindOfClass:[TalksViewController class]])
{
[viewControllersToRemove addObject:currentVC];
if (viewControllersToRemove.count == 2)
{
UIViewController *oneVCtoRemove = [viewControllersToRemove objectAtIndex:0];
[viewControllersFromStackMutable removeObject:oneVCtoRemove];
[self.navigationController setViewControllers:viewControllersFromStackMutable];
}
}
}
Problem is that I have reference to removed VC's in navigation Item. How to fix it?

Answer 1

When you want to remove a view from the navigation stack you can simply just call this method on the navigation bar to pop the view from the stack:
[self.navigationController popViewControllerAnimated:YES];
To pop an external view use
for(UIViewController *currentVC in viewControllersFromStack)
{
if([currentVC isKindOfClass:[TalksViewController class]])
{
[currentVC.navigationController popViewControllerAnimated:YES];
}
}

Answer 2

The above answer is correct.
I have 'A' as rootview controller. 'B to F' are other view controllers. From 'F', if I wanted to go directly to 'A', it is as under.
[self.navigationController popToRootViewControllerAnimated:YES];
BUT if I wanted to jump to 'B' then the code in answer is helpful. I only changed the array of view controllers to run reverse with 'reverseObjectEnumerator' and Animated to NO with 'popViewControllerAnimated:NO'. the Code is as under
NSArray *viewControllersFromStack = [self.navigationController viewControllers];
for(UIViewController *currentVC in [viewControllersFromStack reverseObjectEnumerator])
{
if(![currentVC isKindOfClass:[A class]] && ![currentVC isKindOfClass:[B class]])
{
[currentVC.navigationController popViewControllerAnimated:NO];
}
}