How do I show/hide a UIBarButtonItem?

Question

I created a toolbar in IB with several buttons. I would like to be able to hide/show one of the buttons depending on the state of the data in the main window.

Answer 1

Setting the text color to a clear color when the bar button item is disabled is probably a cleaner option. There's no weirdness that you have to explain in a comment. Also you don't destroy the button so you still keep any associated storyboard segues.

[self.navigationItem.rightBarButtonItem setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor clearColor]}
                                                      forState:UIControlStateDisabled];

Then when ever you want the bar button item hidden, you can just do:

self.navigationItem.rightBarButton.enabled = NO;

It's lame there's no hidden property but this offers the same result.