Question

I am using a storyboard and developping an iPhone app and using a navigation Controller.

when I implemented it I noticed that it is using the name of the view instead of using the default “back” text , is there a way to force it to use “back” ?

Thanks

Answer 1

When you show up the UINavigationController, presumably in your application’s delegate, make the application’s delegate also the navigation controller’s delegate. Then watch for view controllers being popped and pushed:

AppController.h

#import <UIKit/UIKit.h>

@interface AppController.h : NSObject 
<UIApplicationDelegate, UINavigationControllerDelegate> 
{
    UIWindow *window;
    UINavigationController *viewController;
}
/* MARK: Interface Outlets */
@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) IBOutlet UINavigationController *viewController;
@end

AppController.h

#import "AppController.h"

@implementation AppController.h
/* MARK: Init and Dealloc */
- (void)dealloc {
    self.window = nil;
    self.viewController = nil;

    [super dealloc];
}

/* MARK: Interface Outlets */
@synthesize window, viewController;

/* MARK: Application Delegate */
- (BOOL)application:(UIApplication *)application 
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    assert(self.window != nil);
    assert(self.viewController != nil);

    self.viewController.delegate = self;

    /* other initialization */

    [self.window makeKeyAndVisible];

    return YES;
}

/* MRK: Navigation Controller Delegate */
- (void)navigationController:(UINavigationController *)navigationController 
      willShowViewController:(UIViewController *)vc 
                    animated:(BOOL)animated
{
    UIBarButtonItem *myItem = /* initialize */;

    navigationController.topViewController.navigationItem.backBarButtonItem = nil;
    navigationController.topViewController.navigationItem.backBarButtonItem = myItem;
}
@end

Additionally, you can ignore custom view controllers by checking wether -[NSObject isKindOfClass:] match for the wanted view controllers.