Question

Consider:

[self.navigationController popToViewController:[[self.navigationController viewControllers]objectAtIndex:1] animated:YES];

Is there a better way to get index of the view controller to pop to? This way if I do something to the nav stack, I don’t have to go back and edit this. I was thinking of maybe storing it in a ivar on the VC or using #define macros. Any ideas?

Edit:
The stack has four view controllers. I used this code to pop from the fourth to the second.

Answer 1

You can replace code in the question with a simple category on UINavigationController which can be used wherever it’s appropriate.

@interface UINavigationController(indexPoping)
- (void)popToViewControllerAtIndex:(NSInteger)newVCsIndex animated:(BOOL)animated;
@end

@implementation UINavigationController(indexPoping)
- (void)popToViewControllerAtIndex:(NSInteger)newVCsIndex animated:(BOOL)useAnimation
{
    if (newVCsIndex < [self.viewControllers count]) {
        [self popToViewController:[self.viewControllers objectAtIndex:newVCsIndex] animated:useAnimation];
    }
}


// Usage

...

NSInteger indexToPopTo = ...
[self.navigationController popToViewControllerAtIndex:indexToPopTo animated:YES]

...