AppDelegate.cs

using System;
using System.Collections.Generic;
using System.Linq;

using MonoTouch.Foundation;
using MonoTouch.UIKit;
using IQX.TAS.View.Mobile;
using MonoTouch.AtmHud;

namespace IQX.TAS.View.iOS
{
	[Register ("AppDelegate")]
	public partial class AppDelegate : UIApplicationDelegate
	{
		// class-level declarations
		UIWindow _window;
		UINavigationController _tasksNav;
		UISplitViewController _split;

		static AtmHud _hud;
		public static AtmHud HUD {
			get {
				if (_hud == null) {
					_hud = new AtmHud((AtmHudDelegate) null);
				}
				return _hud;
			}
			private set {
				_hud = value;
			}
		}

		public override bool FinishedLaunching (UIApplication app, NSDictionary options)
		{
			// create the navigation controller
			_tasksNav = new UINavigationController(new TasksViewController());

			// create a new window instance based on the screen size
			_window = new UIWindow (UIScreen.MainScreen.Bounds);

			// set the window's navigation controller based upon the device
			if (UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Phone) {
				_window.RootViewController = _tasksNav;
			}
			else {
				_split = new UISplitViewController () {
					Delegate = new SplitDelegate()
				};
				_split.ViewControllers = new UIViewController[] {
					_tasksNav,
					new BlankViewController()
				};
				_window.RootViewController = _split;
			}

			// make the window visible
			_window.MakeKeyAndVisible ();

			// add the hud to the appdelegate
			_window.AddSubview (HUD.View);

			return true;
		}

		class SplitDelegate : UISplitViewControllerDelegate
		{
			public override bool ShouldHideViewController (UISplitViewController svc, UIViewController viewController, UIInterfaceOrientation inOrientation)
			{
				return false;
			}
		}
	}
}

SettingsInputViewController.cs

using System;
using MonoTouch.Dialog;
using MonoTouch.UIKit;
using IQX.TAS.View.Mobile;
using System.Threading;
using System.Drawing;
using MonoTouch.AtmHud;

namespace IQX.TAS.View.iOS
{
	public class SettingsInputDialogViewController : DialogViewController
	{
		public SettingsInputDialogViewController () : base (null, true)
		{
			this.ModalInPopover = true;
			this.ModalPresentationStyle = MonoTouch.UIKit.UIModalPresentationStyle.FormSheet;
			this.ModalTransitionStyle = MonoTouch.UIKit.UIModalTransitionStyle.CoverVertical;
		}

		EntryElement usernameElement = new EntryElement("Username", "e.g. jsmith", null, false);
		EntryElement passwordElement = new EntryElement("Password", "", null, true);
		EntryElement domainElement = new EntryElement("Domain", "e.g. iqx", null, false);

		EntryElement serviceElement = new EntryElement("Service URL", "e.g. http://server/_vti_bin/service.svc", null, false);

		AtmHud hud = new AtmHud((AtmHudDelegate) null);

		public override void ViewWillAppear (bool animated)
		{
			// Set up the hud
			hud.SetFixedSize (new SizeF (200, 100));

			// Set up the view
			this.Root = new RootElement("Setup required")
			{
				new Section()
				{
					usernameElement,
					passwordElement,
					domainElement
				},
				new Section()
				{
					serviceElement
				}
			};

			// Set up nav buttons
			this.NavigationItem.LeftBarButtonItem = new UIBarButtonItem("Reset", UIBarButtonItemStyle.Plain, null, null);
			this.NavigationItem.LeftBarButtonItem.Clicked += LeftButtonTapped;

			this.NavigationItem.RightBarButtonItem = new UIBarButtonItem(UIImage.FromFile ("Resource/Save.png"), UIBarButtonItemStyle.Done, null, null);
			this.NavigationItem.RightBarButtonItem.Clicked += RightButtonTapped;

			// Call the base
			base.ViewWillAppear (animated);
		}

		void RightButtonTapped (object sender, EventArgs e)
		{
			// Disable button and set to saving optic
			ToggleButtonLoading(this.NavigationItem.RightBarButtonItem);

			// Save the settings
			ApplicationSession.Instance.Settings.Username = usernameElement.Value;
			ApplicationSession.Instance.Settings.Password = passwordElement.Value;
			ApplicationSession.Instance.Settings.Domain = domainElement.Value;

			ApplicationSession.Instance.Settings.GatewayUrl = serviceElement.Value;

			// Check that settings are correct on async thread
			DismissThread();
		}

		void LeftButtonTapped (object sender, EventArgs e)
		{
			// Get defaults from service URL

		}

		void DismissThread()
		{
			var threadStart = new ThreadStart(Dismiss);
			var thread = new Thread(threadStart);

			thread.Start();
		}

		void Dismiss()
		{
#if DEBUG
			// REMOVE Simulate a web service call
			Thread.Sleep(5000);
#endif
			BeginInvokeOnMainThread(delegate() {
				if (ApplicationSession.Instance.Settings.IsValid) {
					this.NavigationController.DismissViewController(true, null);

					AppDelegate.HUD.SetCaption ("Success");
					AppDelegate.HUD.SetActivity(false);
					AppDelegate.HUD.SetImage (UIImage.FromFile ("Resource/Checkmark.png"));
					AppDelegate.HUD.Update ();
					AppDelegate.HUD.HideAfter (1);
				} else {
					ToggleButtonLoading(this.NavigationItem.RightBarButtonItem);
				}
			});
		}

		void ToggleButtonLoading(UIBarButtonItem btn)
		{
			BeginInvokeOnMainThread(delegate() {
				btn.Enabled = !btn.Enabled;

				if (!btn.Enabled) {
					AppDelegate.HUD.Show ();
					AppDelegate.HUD.SetCaption ("Checking settings...");
					AppDelegate.HUD.SetActivity (true);
					AppDelegate.HUD.Update();
				} else {
					AppDelegate.HUD.SetCaption ("Oops... Please check and try again...");
					AppDelegate.HUD.SetActivity(false);
					AppDelegate.HUD.SetImage (UIImage.FromFile ("Resource/Error.png"));
					AppDelegate.HUD.Update ();
					AppDelegate.HUD.HideAfter (2);
				}
			});
		}
	}
}

TasksViewController.cs

using System;
using MonoTouch.Dialog;
using IQX.TAS.View.Mobile;
using MonoTouch.UIKit;

namespace IQX.TAS.View.iOS
{
	public class TasksViewController : DialogViewController
	{
		public TasksViewController () : base (null, true)
		{
		}

		public override void ViewWillAppear (bool animated)
		{
			this.Root = new RootElement("Tasks");

			// Show settings wizard if not setup
			if (!ApplicationSession.Instance.Settings.IsConfigured) {
				this.ParentViewController.PresentViewController(new SetupNavigationController (new SettingsInputDialogViewController()), true, null);
			}

			base.ViewWillAppear (animated);
		}
	}
}