Update the BackButton text within a dialog view controller - xamarin.ios

Question

I have a monotouch dialog view controller. I have a number of nested root elements
public RootElement LoginSection()
{
//var rootSection = new Section("");
var root = new RootElement ("I'm already a member");
EntryElement emailEnt = new EntryElement ("Login","Username or Email","");
EntryElement passwdEnt = new EntryElement ("Password","Password","",true);
StyledStringElement loginBtn = new StyledStringElement ("Login"){
Accessory = UITableViewCellAccessory.DetailDisclosureButton
};
Section loginDetails = new Section("Your Details"){emailEnt,passwdEnt,loginBtn};
loginBtn.Tapped += () => {
var result = ApiOperations.ApiValidateLoginCredentials (emailEnt.Value, passwdEnt.Value);
if (result) {
var login = DataOperations.DbGetLogin ();
//first time user so we need to save their details into the db
if (login == null) {
} else {
BTProgressHUD.Show ("Logging In", -1, BTProgressHUD.MaskType.Black);
BTProgressHUD.InvokeInBackground (delegate {
ApiOperations.QrCode (login.ConsumerId);
ApiOperations.ApiConsumer (login.ConsumerId);
AuthenicatedActionCompleted.Invoke (this, new EventArgs ());
BTProgressHUD.Dismiss ();
});
}
} else {
//didnt work
using (var alert = new UIAlertView ("Unable to login", "Please try again.", null, "OK", null))
alert.Show ();
}
};
root.Add (loginDetails);
return root;
}
My problem is the the length of each of the element titles. My top level root title is also long e.g. Welcome to my application
If I tap on an rootelement above the back button shows "welcome to...." ideally I would like the button to show "back" vs the long string.
Is it possible to update this?

Answer 1

Ok solved it. If anyone else has the same problem this worked for me.
The last line is the trick.
public override void LoadView ()
{
base.LoadView ();
View.BackgroundColor =UIColor.Clear;
TableView.BackgroundView = null;
var background = UIImage.FromBundle(Resources.BackgroundImagePath);
ParentViewController.View.BackgroundColor = UIColor.FromPatternImage (background);
this.NavigationItem.BackBarButtonItem = new UIBarButtonItem ("Back", UIBarButtonItemStyle.Plain, null);
}