Qfyilyi

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;

You can do the following if you are running on Swift

self.navigationItem.rightBarButtonItem?.enabled = true

This snippet will disable the button.

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;

Latest Swift: To hide the back button, you MUST use:

self.navigationItem.setHidesBackButton(true, animated: false)

Note: This can trigger a bug in the navigation bar that can cause an artifact to appear in place of a hidden back button when transitioning to a view that doesn't have a back button (or has a leftButton in its place). The artifact that appears is either ellipses "..." or the title of the previous viewController on the stack. I believe this bug to be related to the bug documented in apple's own sample code project "CustomizingUINavigationBar", CustomBackButtonViewController.m

- (void)viewDidLoad

{

[super viewDidLoad];

self.navigationItem.leftBarButtonItem=nil;

self.navigationItem.hidesBackButton=YES;

}

I solved this by just adding a property to my viewcontroller:

@property (nonatomic, strong) IBOutlet UIBarButtonItem * RightButton;

I then connected it to the button on the storyboard.
You can then at will set its properties like:

self.RightButton.enabled=true;

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...!

For version iOS 10.3, swift 3:

self.navigationItem.rightBarButtonItem?.isEnabled = false.

One line solution

self.navigationController?.view.isUserInteractionEnabled = false

Try this code:

UIApplication.sharedApplication().beginIgnoringInteractionEvents()

This will stop user to interaction with app and after service call, write this code again:

UIApplication.sharedApplication().endIgnoringInteractionEvents()

Sure this will help.

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

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!

}