无法在TabController内的NavigatioNController中的Xamarin iOS中添加导航项

Question

I'm trying to add a NavigationItem to my Navbar put when I deploy it on my device it will not show up.

I think it's similar to the tutorial on the xamarin website.

Any ideas?

This is my code:

using System;
using UIKit;

namespace myNameSpace
{
    public class LinksPageController : UINavigationController
    {
        public LinksPageController ()
        {
            NavigationBar.BarTintColor = UIColor.FromRGB (183, 28, 28);
        }

        public override void ViewDidLoad ()
        {
            base.ViewDidLoad ();
            this.NavigationItem.SetRightBarButtonItem(
                new UIBarButtonItem(UIBarButtonSystemItem.Action, (sender,args) => {
                    UIAlertView alert = new UIAlertView("Add link!", "Enter the ID of the person you want to be linked with:", null, "Cancel", "OK");
                    alert.AlertViewStyle = UIAlertViewStyle.PlainTextInput;
                    alert.Show ();
                })
                , true);
        }

        public override void ViewWillAppear (bool animated)
        {
            base.ViewWillAppear (animated);
        }
    }
}

Answer 1

How about instantiating a class button before adding it to the navBar? could it be that you are losing the instance pointer..??

UIBarButtonItem * newButton;
public override void ViewDidLoad ()
    {
        base.ViewDidLoad ();

        newButton =  new UIBarButtonItem(UIBarButtonSystemItem.Action, (sender,args) => {
                UIAlertView alert = new UIAlertView("Add link!", "Enter the ID of the person you want to be linked with:", null, "Cancel", "OK");
                alert.AlertViewStyle = UIAlertViewStyle.PlainTextInput;
                alert.Show ();
            })

        this.NavigationItem.SetRightBarButtonItem(newButton, true);
    }