public override void ViewDidLoad()
{
base.ViewDidLoad();
//iOS Image Search code
viewModel = new ImageSearchViewModel();
CollectionViewImages.WeakDataSource = this;
//Button Click event to get images
ButtonSearch.TouchUpInside += async(sender, args) =>
{
ButtonSearch.Enabled = false;
ActivityIsLoading.StartAnimating();
await viewModel.SearchForImagesAsync(TextFieldQuery.Text);
CollectionViewImages.ReloadData();
ButtonSearch.Enabled = true;
ActivityIsLoading.StopAnimating();
};
//IOS Keyboard Done Code
var toolbar = new UIToolbar(new CGRect(0.0f, 0.0f, TextFieldQuery.Frame.Size.Width, 44.0f));
toolbar.Items = new[]
{
new UIBarButtonItem(UIBarButtonSystemItem.FlexibleSpace),
new UIBarButtonItem(UIBarButtonSystemItem.Done, delegate { TextFieldQuery.ResignFirstResponder(); })
};
TextFieldQuery.InputAccessoryView = toolbar;
}
private static string GetFullTextString(this TextFieldQuery fq)
{
if (fq == null)
{
throw new ArgumentNullException(nameof(fq));
}
string fullTextString;
switch (fq.Operator)
{
case TextFieldValueOperator.Contains:
case TextFieldValueOperator.Equals:
fullTextString = $"\"{fq.Value}\"";
break;
case TextFieldValueOperator.StartsWith:
fullTextString = $"\"{fq.Value}*\"";
break;
default:
throw new ApplicationException("Only Contains, Equals and EndsWith operators are allowed");
}
switch (fq.Disposition)
{
case QueryDisposition.Required:
fullTextString += " AND ";
break;
case QueryDisposition.Optional:
fullTextString += " OR ";
break;
case QueryDisposition.Forbidden:
fullTextString += " AND NOT ";
break;
}
return(fullTextString);
}
