public static Task <SampleItem[]> GetSelectedItemsAsync(UIViewController viewController, SampleItem[] items,
SampleItem[] itemsSelected, string title,
bool allowMultipleSelection, bool allowFiltering)
{
// var storyboard = UIStoryboard.FromName("Main", null);
// var vc = (SelectionViewController)storyboard.InstantiateViewController(nameof(SelectionViewController));
var vc = new SelectionViewController2();
vc.Title = title;
vc._allowMultipleSelection = allowMultipleSelection;
vc._allowFiltering = allowFiltering;
vc._tcs = new TaskCompletionSource <SampleItem[]>();
vc._items = items;
vc._itemsSelected = itemsSelected;
var nav = new UINavigationController(vc);
if (UIDevice.CurrentDevice.CheckSystemVersion(13, 0))
{
nav.PresentationController.Delegate = new UIAdaptivePresentationController(vc._tcs);
}
viewController.PresentViewController(nav, true, null);
return(vc._tcs.Task);
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
// Perform any additional setup after loading the view, typically from a nib.
Button.TouchUpInside += async(sender, args) =>
{
var items = new[]
{
new SampleItem("Roxanne Bailey"),
new SampleItem("Jack Clayton"),
new SampleItem("Ron Lynch"),
new SampleItem("Pat Garrett"),
new SampleItem("Irma Norton"),
new SampleItem("Kathy Dennis")
};
var selectedItems = items.Take(Switch.On ? 2 : 1).ToArray();
var result = await SelectionViewController2.GetSelectedItemsAsync(this, items, selectedItems,
"Test", Switch.On, true);
if (result.Length == 1 && result[0] != selectedItems[0])
{
//add the item back
}
Debug.WriteLine("Selected items:");
foreach (var item in result)
{
Debug.WriteLine($"\t{item.Name}");
}
};
}