Go to particular parent class from subclass

you can find that particular UIViewController from its navigationController's viewControllers array like bellow...

    for (UIViewController *controller in self.navigationController.viewControllers) {

        if ([controller isKindOfClass:[YourViewController class]]) {

            //Do not forget to import that YourViewController.h

            

            [self.navigationController popToViewController:controller

                                                  animated:YES];

            break;

        }

    }