Showing native iOS Form Sheet from Xamarin.Forms

Hi All,

I have a Xamarin app which has some of its screens in Xamarin.iOS and the rest in Xamarin.Forms. I've used the Native2Forms sample project to call the Xamarin.Forms bits from iOS and it all works pretty smoothly.

I need the ability to add a signature in Xamarin.Forms and unfortunately the only library which supported this is now unsupported and doesn't work with the latest Forms 2.0.

What I basically want to do is add a button to my Xamarin.Forms logic, which calls back to iOS to display Xamarin's SignaturePad in a native Form Sheet and then return that signature back to Xamarin.Forms to display as an image on the screen.

I can raise events back to iOS to show the form sheet just fine, but how do I go about actually returning the image back to Xamarin.Forms?

Thanks