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

In swift 4 I has a trick to show / hide right or left button:

Step 1: Create a IBOutlet button in view controller:

@IBOutlet var navigationItemButton: UIBarButtonItem!

Step 2: Create Hide button function:

func hideNavigationButton() {
    navigationItemButton.isEnabled = false
    navigationItemButton.tintColor = UIColor.clear
}

Step 3: Create Show button function:

func showNavigationButton() {
    navigationItemButton.isEnabled = true
    navigationItemButton.tintColor = UIColor.white
}

Step 4: Just call the functions that you want, use hideNavigationButton() to hide, and showNavigationButton() to show the button.

Regards!