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

This code should work on Swift 4.2

self.navigationItem.rightBarButtonItem?.isEnabled = false

The above code will disable the button. To enable it switch the boolean to true

Answer 2

Just disable your UINavigationController view and navigation bar interaction:

self.navigationController.navigationBar.userInteractionEnabled = NO;
self.navigationController.view.userInteractionEnabled = NO;

And enable it when you need it back:

self.navigationController.navigationBar.userInteractionEnabled = YES;
self.navigationController.view.userInteractionEnabled = YES;

Answer 3

var menuBtn = new UIButton(UIButtonType.Custom);
menuBtn.Frame = new CGRect(x: 0.0, y: 0.0, width: 20, height: 20);
menuBtn.SetImage(new UIImage("filter"), UIControlState.Normal);

menuBtn.Alpha = 0.05f;   //to set the Alpha

menuBtn.Enabled = false;

tested on Mvvmcross Xamarin.iOS only

Answer 4

Try this

Recommended

self.navigationItem.leftBarButtonItem.enabled = NO;

self.navigationItem.rightBarButtonItem.enabled = NO;

Or Simply Disable by

on Edge case

self.view.window.userInteractionEnabled = NO;

Update: Recently Apple doesn't allow the back button to enable / disable. Instead of that we can hide it.

self.navigationItem.hidesBackButton = YES;