How to hide a TabBarItem in Xamarin iOS - xamarin

Question

I have a Storyboard with a TabBarController and six subviews as Tabs. The TabBarController and each Tab has a Controller Class assigned.
The content of some tabs is loaded from a server. In some cases there is no content for a tab and for this case I want to hide the TabBarItem.
I've tried (just for testing)
this.TabBarController.TabBar.Items [0].Enabled = false;
but it doesn't work.
How can I hide a single TabBarItems? I've searched Google, StackOverflow and the Xamarin Forum but found no solution for my problem.
The only solution I've found was to remove the subview from the subviews-array, but in this case I cannot simply "reactivate" the tab if I want to show the tab again.

Answer 1

In case of UITabBar:
UITabBar sampleTabBar;
public override void ViewDidLoad ()
{
base.ViewDidLoad ();
// Perform any additional setup after loading the view, typically from a nib.
sampleTabBar = new UITabBar ();
sampleTabBar.Frame = new CoreGraphics.CGRect (10f, 64f, this.View.Frame.Width - 10, 50f);
var tabBarItem = new UITabBarItem ("TAB BAR ITEM", null, 4);
sampleTabBar.Items = new UITabBarItem[]{ tabBarItem };
sampleTabBar.ItemSelected += (sender, e) => {
Console.WriteLine ("tab bar button item slected");
//Disable Tab Bar item here
tabBarItem.Enabled = false;
tabBarItem.Title = "Disabled now";
};
this.View.AddSubview (sampleTabBar);
}
tabBarItem.Image property also can be used for getting the result.
1) Set a placeholder image as default.
2) Populate images from array/source to uibarButtonItem.
3) Use placeholder image wherever need to hide uibarbuttonitem.

Answer 2

I think if you want to completely hide the UITabbarItem you will need to remove the UIViewController from the UITabbarController like so:
var tbViewControllers = new List<UIViewController> (TabBarController.ViewControllers);
tbViewControllers.RemoveAt (2); // remove whatever index you need.
TabBarController.ViewControllers = tbViewControllers.ToArray ();
but you will need to keep a reference to all the UIViewControllers you want and add it back in like so:
var tbViewControllers = new List<UIViewController> (TabBarController.ViewControllers);
tbViewControllers.Insert (2, new RemvoedViewController());
TabBarController.ViewControllers = tbViewControllers.ToArray ();