ActivationViewController.cs

using System;
using System.Drawing;

using MobileCoreServices;
using Foundation;
using UIKit;

namespace actionextension
{
	public partial class ActionViewController : UIViewController
	{
		public ActionViewController (IntPtr handle) : base (handle)
		{
		}

		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 ();

			// Get the item[s] we're handling from the extension context.

			// For example, look for an image and place it into an image view.
			// Replace this with something appropriate for the type[s] your extension supports.
			bool imageFound = false;

			foreach (var item in ExtensionContext.InputItems) {
				foreach (var itemProvider in item.Attachments) {
					if (itemProvider.HasItemConformingTo (UTType.Image)) {
						// This is an image. We'll load it, then place it in our image view.
						itemProvider.LoadItem (UTType.Image, null, delegate (NSObject image, NSError error) {
							if (image != null) {
								NSOperationQueue.MainQueue.AddOperation (delegate {
									imageView.Image = (UIImage) image;
								});
							}
						});

						imageFound = true;
						break;
					}
				}

				if (imageFound) {
					// We only handle one image, so stop looking for more.
					break;
				}
			}
		}

		partial void DoneClicked (NSObject sender)
		{
			// Return any edited content to the host app.
			// This template doesn't do anything, so we just echo the passed-in items.
			ExtensionContext.CompleteRequest (ExtensionContext.InputItems, null);
		}
	}
}