Handle Android back button in cocos2d-iphone with Apportable (in MyNavigationController class)

AppDelegate.m

#ifdef APPORTABLE

- (BOOL) canBecomeFirstResponder
{
    return YES;
}

- (void)buttonUpWithEvent:(UIEvent *)event
{
    switch (event.buttonCode)
    {
        case UIEventButtonCodeBack:
            // Back button is pressed
            
            // Pop current scene
            [[CCDirector sharedDirector] popScene];
            
            // Terminate the app if scene stack is empty
            if([[CCDirector sharedDirector] runningScene] == nil) {
                exit(0);
            }
            break;
        case UIEventButtonCodeMenu:
            // show menu if possible.
            break;
        default:
            break;
    }
}

#endif