Using iOS's JavascriptCore as a Web Worker of sorts

jstest.cs

using System;
using System.Drawing;
using MonoTouch.Foundation;
using MonoTouch.UIKit;
using MonoTouch.JavaScriptCore;

namespace jscoretest
{
    public partial class jscore_testViewController : UIViewController
    {
        public jscore_testViewController () : base ("jscore_testViewController", null)
        {
        }

        public override void DidReceiveMemoryWarning ()
        {
            // Releases the view if it doesn't have a superview.
            base.DidReceiveMemoryWarning ();
            
            // Release any cached data, images, etc that aren't in use.
        }

        public override void ViewDidLoad ()
        {
            base.ViewDidLoad ();
            var webV = new UIWebView (new RectangleF (0, 0, 320, 480));
            base.Add (webV);

            var pageHtml = @"
                <a href='#test'>test</a>
                <script>
                    window.receiveMsg = function(msg) {
                        alert(msg);
                    };
                </script>
            ";

            var jsScript = @"
                var testFunc = function(){
                    return 'hello, this is a test message';
                }
            ";



            JSContext context = new JSContext ();
            context.EvaluateScript (jsScript);


            webV.LoadHtmlString (pageHtml, new NSUrl("http://localhost"));

            // This is what we're using to send events from the page back to iOS. The page changes the page fragment
            // to pass events and potentially data

            webV.ShouldStartLoad = (delegate(UIWebView webView, NSUrlRequest request, UIWebViewNavigationType navigationType) {
                if (request.Url.Fragment == "test") {
                    var result = context.EvaluateScript ("testFunc()"); 
                    webV.EvaluateJavascript("window.receiveMsg('" + result.ToString() + "');");
                    return false;
                }
                return true;
            });

        }
    }
}