how to disable a navigation bar button item in iOS

Question

I have created a navigation controller. In the second view (which is pushed), I have some webservice call and placing a overlay view and setting

self.view.use

Answer 1

Swift 5 It's working for Navigation controller

//Disable

self.navigationController?.navigationBar.isUserInteractionEnabled = false

//Enable

self.navigationController?.navigationBar.isUserInteractionEnabled = true

Answer 2

Updated for Swift 3:

If you want to disable a navigation bar button item OR you want to disable hole UINavigationBar i.e. all item present on navigation bar, use below lines of code;

// if you want disable
self.navigationController?.navigationBar.isUserInteractionEnabled = false

// if you want enable again
self.navigationController?.navigationBar.isUserInteractionEnabled = true

Enjoy...!

Answer 3

One line solution

self.navigationItem.leftBarButtonItem.enabled = NO;

self.navigationItem.rightBarButtonItem.enabled = NO;

Answer 4

The simplest way to truly disable a UIBarButtonItem would be as followed:

barButtonVar.isEnabled = false

Answer 5

Navigation bar button items must be toggled by referring to them via the navigationItem property.

For example:

func setupNav() {
    let saveButton = UIBarButtonItem.init(barButtonSystemItem: .save, target: self, action: #selector(onSavePressed))
    navigationItem.rightBarButtonItem = saveButton
    saveButton.isEnabled = false
  }

func validateSave() {
     saveButton.isEnabled = isConditionMet // WON'T work
      navigationItem.rightBarButtonItem.isEnabled = isConditionMet // WORKS!
}

Answer 6

For version iOS 10.3, swift 3:

self.navigationItem.rightBarButtonItem?.isEnabled = false.