NavigationController BackButton Title hider

NavCtlrBackTitleHider.h

#import <Foundation/Foundation.h>

@interface NavCtlrBackTitleHider : NSObject <UINavigationControllerDelegate>

@end

NavCtlrBackTitleHider.m

#import "NavCtlrBackTitleHider.h"

@interface NavCtlrBackTitleHider ()
{
    UINavigationControllerOperation operationType;
}

@end

@implementation NavCtlrBackTitleHider

#pragma mark - UINavigationControllerDelegate methods
- (void)navigationController:(UINavigationController *)navigationController
      willShowViewController:(UIViewController *)viewController
                    animated:(BOOL)animated
{
    if (operationType == UINavigationControllerOperationPush) { //Pushing
        UIViewController *fromVC = navigationController.viewControllers[navigationController.viewControllers.count - 2];
        UINavigationItem *navItem = fromVC.navigationItem;
        
        //Override the BackButton Item
        UIBarButtonItem *backBt = [[UIBarButtonItem alloc] initWithTitle:@""
                                                                   style:UIBarButtonItemStylePlain
                                                                  target:nil
                                                                  action:nil];
        navItem.backBarButtonItem = backBt;


    }else if(operationType == UINavigationControllerOperationPop){ //Popping
        
    }else { //Presenting RootViewController

    }
}

- (nullable id <UIViewControllerAnimatedTransitioning>)navigationController:(UINavigationController *)navigationController
                                            animationControllerForOperation:(UINavigationControllerOperation)operation
                                                         fromViewController:(UIViewController *)fromVC
                                                           toViewController:(UIViewController *)toVC
{
    operationType = operation;
    return nil;
}

@end