void CreatePicker()
{
_entry = new NoCaretField();
_entry.BorderStyle = UITextBorderStyle.None;
_entry.BackgroundColor = UIColor.Clear;
_view.AddSubview(_entry);
//_view.AutoresizingMask = UIViewAutoresizing.FlexibleHeight | UIViewAutoresizing.FlexibleWidth;
_entry.TranslatesAutoresizingMaskIntoConstraints = false;
_constraint = CreateConstraint(_view, _entry);
_view.UserInteractionEnabled = true;
_view.AddConstraints(_constraint);
_view.SendSubviewToBack(_entry);
_picker = new UIPickerView();
var width = UIScreen.MainScreen.Bounds.Width;
var toolbar = new UIToolbar(new CGRect(0, 0, (float)width, 44))
{
BarStyle = UIBarStyle.Default, Translucent = true
};
var cancelButton = new UIBarButtonItem(UIBarButtonSystemItem.Cancel, (o, e) => {
_entry.ResignFirstResponder();
Select(_model.PreSelectedItem);
});
_title = new UILabel();
var labelButton = new UIBarButtonItem(_title);
var spacer = new UIBarButtonItem(UIBarButtonSystemItem.FlexibleSpace);
var doneButton = new UIBarButtonItem(UIBarButtonSystemItem.Done, (o, a) => {
var s = (NumberPickerSource)_picker.Model;
UpdatePickerFromModel(s);
_entry.ResignFirstResponder();
_command?.Execute(s.SelectedItem);
});
toolbar.SetItems(new[] { cancelButton, spacer, labelButton, spacer, doneButton }, false);
_entry.InputView = _picker;
_entry.InputAccessoryView = toolbar;
_model = new NumberPickerSource();
_picker.Model = _model;
}
void UpdatePickerFromModel(NumberPickerSource s)
{
_model.PreSelectedItem = s.SelectedItem;
AddNumberPicker.SetNumber(Element, s.SelectedItem);
}