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

iOS 8. UIBarButtonItem with custom image. Tried many different ways, most of them were not helping. Max's solution, thesetTintColor was not changing to any color. I figured out this one myself, thought it will be of use to some one.

For Hiding:

[self.navigationItem.rightBarButtonItem setEnabled:NO];
[self.navigationItem.rightBarButtonItem setImage:nil];

For Showing:

[self.navigationItem.rightBarButtonItem setEnabled:YES];
[self.navigationItem.rightBarButtonItem setImage:image];