How to open a UIPickerView on click of UITextField's Rightview in Xamrin IOS customrenderer

I have a created a custom Picker with downarrow image at right side using UITextFied in Xamarin ios. When I click the downarrow, the picker is not opening. But when the click centre of the UITextField, the picker is opening. How to open the pickerview when click of downarrow?

[assembly: ExportRenderer(typeof(CustomMonthPicker), typeof(CustomMonthPickerRenderer))]namespace AMS.iOS.CustomRenderer{    public class CustomMonthPickerRenderer : ViewRenderer<CustomMonthPicker, UITextField>    {        private DateTime _selectedDate;        private UITextField _dateLabel;        private PickerDateModel _pickerModel;         protected override void OnElementChanged(ElementChangedEventArgs<CustomMonthPicker> e)        {            try            {                base.OnElementChanged(e);                _dateLabel = new UITextField();                var dateToday = Element.Date;                SetupPicker(new DateTime(dateToday.Year, dateToday.Month, 1));                SetNativeControl(_dateLabel);                Control.EditingChanged += ControlOnEditingChanged;                Element.PropertyChanged += Element_PropertyChanged;            }            catch (Exception ex)            {                Console.WriteLine(ex.Message);            }        }        private void ControlOnEditingChanged(object sender, EventArgs e)        {            if (Element.Date.ToString().Equals(DateTime.MinValue.ToString()))            {                _dateLabel.Text = "";            }            else            {                var monthName = SetMonthNumberToMonthName(Element.Date.Month);                var currentDate = $"{monthName} | {Element.Date.Year}";                if (_dateLabel.Text != currentDate)                {                    _dateLabel.Text = currentDate;                }            }        }        protected override void Dispose(bool disposing)        {            Element.PropertyChanged -= Element_PropertyChanged;            base.Dispose(disposing);        }        private void SetupPicker(DateTime date)        {            var datePicker = new UIPickerView();            _pickerModel = new PickerDateModel(datePicker, date);            datePicker.ShowSelectionIndicator = true;            _selectedDate = date;            _pickerModel.PickerChanged += (sender, e) =>            {                _selectedDate = e;            };            datePicker.Model = _pickerModel;            //_pickerModel.MaxDate = Element.MaxDate ?? DateTime.MaxValue;            //_pickerModel.MinDate = Element.MinDate ?? DateTime.MinValue;            var toolbar = new UIToolbar            {                BarStyle = UIBarStyle.Default,                Translucent = true            };            toolbar.SizeToFit();            var doneButton = new UIBarButtonItem("Done", UIBarButtonItemStyle.Done,                (s, e) =>                {                    Element.Date = _selectedDate;                    if (_selectedDate == DateTime.MinValue)                    {                        Element.Date = DateTime.Now;                    }                    var monthNameText = SetMonthNumberToMonthName(Element.Date.Month);                    _dateLabel.Text = $"{monthNameText} | {Element.Date.Year}";                    MessagingCenter.Send<App>((App)Xamarin.Forms.Application.Current, "PrefferedDateChanged");                    _dateLabel.ResignFirstResponder();                });            toolbar.SetItems(new[] { new UIBarButtonItem(UIBarButtonSystemItem.FlexibleSpace), doneButton }, true);            Element.Date = _selectedDate;            var monthName = SetMonthNumberToMonthName(Element.Date.Month);            //if (Element.Date.Equals(DateTime.MinValue.ToString()))            //{            //    _dateLabel.Text = "";            //}            //else            if (Element.Date.Year == 1)            {                _dateLabel.Text = "";            }            else                _dateLabel.Text = $"{monthName} | {Element.Date.Year}";            _dateLabel.InputAccessoryView = toolbar;            _dateLabel.TextColor = Element.TextColor.ToUIColor();            _dateLabel.VerticalAlignment = UIControlContentVerticalAlignment.Fill;            _dateLabel.HorizontalAlignment = UIControlContentHorizontalAlignment.Fill;            _dateLabel.TextAlignment = (UITextAlignment)TextAlignment.Center;            var downarrow = UIImage.FromBundle("brandIcon.png");            CGSize iconSize = downarrow.Size;            if (20 > -1)                iconSize = new CGSize((float)20, (float)20);            UIView paddingView = new UIView(new CGRect(0, 0, iconSize.Width + 8, iconSize.Height + 8));            UIImageView sideView = new UIImageView(new CGRect(0, 4, iconSize.Width, iconSize.Height));            sideView.Image = downarrow;            paddingView.AddSubview(sideView);            paddingView.UserInteractionEnabled = true;            _dateLabel.RightViewMode = UITextFieldViewMode.Always;            _dateLabel.RightView = paddingView;            //var gesture = new UITapGestureRecognizer(()=> {            //    if (datePicker != null)            //    {            //        //datePicker.Hidden = !datePicker.Hidden;            //        _dateLabel.InputView.Hidden = !_dateLabel.InputView.Hidden;            //        //_dateLabel.AccessibilityRespondsToUserInteraction = true;            //    }            //});            //paddingView.AddGestureRecognizer(gesture);            _dateLabel.RightView.UserInteractionEnabled = true;           // _dateLabel.RightView.AddGestureRecognizer(gesture);            _dateLabel.InputView = datePicker;        }        private void Element_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)        {            try            {                if (e.PropertyName == CustomMonthPicker.MaxDateProperty.PropertyName)                {                    _pickerModel.MaxDate = Element.MaxDate ?? DateTime.MinValue;                }                else if (e.PropertyName == CustomMonthPicker.MinDateProperty.PropertyName)                {                    _pickerModel.MinDate = Element.MinDate ?? DateTime.MaxValue;                }            }            catch (Exception ex)            {                Console.WriteLine(ex.Message);            }        }    }}

How to open the pickerview when click of downarrow?