How do I hide/show the right button in the Navigation Bar

Question

I need to hide the right button in the Navigation Bar, then unhide it after the user selects some options.

Unfortunately, the following doesn\'t work:

Answer 1

Credit has to go to learner for this answer which the answer is from this question:

hide and show left navigation bar button on demand in iOS-7

This is the answer, which is far more simple.

//hide and reveal bar buttons
-(void) hideAndDisableLeftNavigationItem
{
    [self.navigationItem.leftBarButtonItem setTintColor:[UIColor clearColor]];
    [self.navigationItem.leftBarButtonItem setEnabled:NO];
}

-(void) showAndEnableLeftNavigationItem
{
    [self.navigationItem.leftBarButtonItem setTintColor:[UIColor blueColor]];
    [self.navigationItem.leftBarButtonItem setEnabled:YES];
}

Then you just reference the method where you require it like within an (IBAction) like so:

[self hideAndDisableLeftNavigationItem];//[self showAndEnableLeftNavigationItem]; to show again

I tried all other methods and none worked, even referencing my button as a @property (...) UIBarButtonItem.... and nothing worked until I found this.