Question

I have a split view based app, and would like to listen for some sort of notification for when the root menu is displayed. The reason I want to do this is because the keyboard overlaps the menu, so I would like to hide the keyboard when the menu is displayed.

    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillHide:) 
                                                 name:<Some Notification Here> 
                                               object:self.view.window];

I already have the method to hide the keyboard, I’m just looking for the appropriate notification.

Thanks!

Answer 1

you can post the notification yourself from the root menu. Just subclass it and post the notification on viewDidAppear or viewWillAppear.

The word of warning: if you are targeting iOS 5 and up you should kep in mind the viewWillAppear and viewDidAppear are deprecated in iOS6. use
willMoveToParentViewController or didMoveToParentViewController or -(void)viewWillLayoutSubviews

-(void)willMoveToParentViewController:(UIViewController *)parent{
    if (!parent)
      //post notification here


}

Also, you can provide nil as a notification name and listen to any possible notification, then NSLog it out, perhaps you can find a useful notification there, just make sure it is documented to futureproof your product.

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(notificationReceived:) name:nil object:nil];