Shre vieew controller Xamarin

ShareviewController.cs

public override void ViewDidLoad ()
{
	base.ViewDidLoad ();
}

public override void ViewDidAppear (bool animated)
{
	try {
		base.ViewDidAppear (animated);

		//load items
		var inputItem = ExtensionContext.InputItems [0];
		NSItemProvider[] itemAttachmentsProvider = inputItem.Attachments;
		attachmentItemCount = inputItem.Attachments.Length;
		if (itemAttachmentsProvider != null && itemAttachmentsProvider.Length>0)
			LoadMediaData(itemAttachmentsProvider);

	} catch (Exception ex) {
		Console.WriteLine(ex.Message);
	}
}

public override void DidSelectPost ()
{

	// This is called after the user selects Post. Do the upload of contentText and/or NSExtensionContext attachments.
	//HACK: instead of uploading photos from here, get path and attach to app url and open host app
	OpenHostApp (appSchemaUrl + invokeArgs);
}

//Load media data
void LoadMediaData(NSItemProvider[] itemAttachmentsProvider)
{
	foreach(NSItemProvider itemProvider in itemAttachmentsProvider)
	{
		string typeIdentifier = string.Empty;
		//i.e : Any type of image
		if (itemProvider.HasItemConformingTo(UTType.Image)) 
			typeIdentifier = UTType.Image;

		//i.e : .mp4
		if (itemProvider.HasItemConformingTo (UTType.MPEG4)) 
			typeIdentifier = UTType.MPEG4;

		//quick time video i.e : .mov
		if (itemProvider.HasItemConformingTo (UTType.QuickTimeMovie)) 
			typeIdentifier = UTType.QuickTimeMovie;
		
		//for safari browser url
		if (itemProvider.HasItemConformingTo(UTType.URL))
			typeIdentifier = UTType.URL;

		//for youtube video url from youtube app
		if (itemProvider.HasItemConformingTo(UTType.PlainText))
			typeIdentifier = UTType.PlainText;

		if(!string.IsNullOrEmpty(typeIdentifier))
			LoadItemWithTypeIdentifier(itemProvider, typeIdentifier);
	}
}

//Load item with type identifier
void LoadItemWithTypeIdentifier(NSItemProvider item, string typeIdentifier)
{
	itemIdx++;

	// The app won't be able to access the images by path directly in the Camera Roll folder,
	// so we temporary copy them to a folder which both the extension and the app can access:
	string filePath = SaveMediaToAppGroupFolder (item, typeIdentifier);
	if(string.IsNullOrEmpty(filePath))
		return;

	// Now add the path to the list of arguments we'll pass to the app:
	AddMediaPathToArgumentList (filePath);
}

//Open MainHost App
void OpenHostApp(string url){
	if (UIApplication.SharedApplication.CanOpenUrl (new NSUrl (url))) {
		UIApplication.SharedApplication.OpenUrl (new NSUrl (url));

		DispatchQueue.MainQueue.DispatchAfter (new DispatchTime (DispatchTime.Now, 3000000000), () => {
			List<NSExtensionItem> list = new List<NSExtensionItem>();
			ExtensionContext.CompleteRequest (list.ToArray(), null);
		});
	} else {
		ShowAlert ("Can not share media");
	}
}