protected override void OnElementChanged(ElementChangedEventArgs <Xamarin.Forms.Picker> e)
{
base.OnElementChanged(e);
if (this.Control != null)
{
this.Control.BorderStyle = UITextBorderStyle.None;
if (this.Element is CustomPicker customPicker)
{
this.Control.TextAlignment = TextAlignmentHelper.Convert(customPicker.HorizontalTextAlignment);
if (customPicker.SelectedItem == null && !string.IsNullOrEmpty(customPicker.Placeholder))
{
this.Control.Text = null;
this.Control.AttributedPlaceholder = new NSAttributedString(customPicker.Placeholder, foregroundColor: customPicker.PlaceholderColor.ToUIColor());
}
if (customPicker.MultilineEnabled)
{
var nativePicker = Control.InputView as UIPickerView;
nativePicker.Delegate = new MyPickerDelegate(
() => Element.Items.ToList(),
() => customPicker.PickerRowHeight,
(selectedIndex) => this.Element.SelectedIndex = selectedIndex);
}
}
}
}
protected override void OnElementChanged(ElementChangedEventArgs <Xamarin.Forms.DatePicker> e)
{
base.OnElementChanged(e);
if (this.Control != null)
{
this.Control.BorderStyle = UITextBorderStyle.None;
if (this.Element is CustomDatePicker customDatePicker)
{
this.Control.TextAlignment = TextAlignmentHelper.Convert(customDatePicker.HorizontalTextAlignment);
if (!customDatePicker.Date.HasValue && !string.IsNullOrEmpty(customDatePicker.Placeholder))
{
this.Control.Text = null;
this.Control.AttributedPlaceholder = new NSAttributedString(customDatePicker.Placeholder, foregroundColor: customDatePicker.PlaceholderColor.ToUIColor());
}
if (UIDevice.CurrentDevice.CheckSystemVersion(13, 2))
{
try
{
UIDatePicker picker = (UIDatePicker)Control.InputView;
picker.PreferredDatePickerStyle = UIDatePickerStyle.Wheels;
}
catch (Exception)
{ }
}
}
}
}
protected override void OnElementChanged(ElementChangedEventArgs <Xamarin.Forms.DatePicker> e)
{
base.OnElementChanged(e);
if (this.Control != null)
{
this.Control.BorderStyle = UITextBorderStyle.None;
if (this.Element is CustomDatePicker customDatePicker)
{
this.Control.TextAlignment = TextAlignmentHelper.Convert(customDatePicker.HorizontalTextAlignment);
if (!customDatePicker.Date.HasValue && !string.IsNullOrEmpty(customDatePicker.Placeholder))
{
this.Control.Text = null;
this.Control.AttributedPlaceholder = new NSAttributedString(customDatePicker.Placeholder, foregroundColor: customDatePicker.PlaceholderColor.ToUIColor());
}
}
}
}
protected override void OnElementChanged(ElementChangedEventArgs <Xamarin.Forms.Picker> e)
{
base.OnElementChanged(e);
if (this.Control != null)
{
this.Control.BorderStyle = UITextBorderStyle.None;
if (this.Element is DoublePicker doublePicker)
{
this.Control.TextAlignment = TextAlignmentHelper.Convert(doublePicker.HorizontalTextAlignment);
if (doublePicker.SelectedItem == null && !string.IsNullOrEmpty(doublePicker.Placeholder))
{
this.Control.Text = null;
this.Control.AttributedPlaceholder = new NSAttributedString(doublePicker.Placeholder, foregroundColor: doublePicker.PlaceholderColor.ToUIColor());
}
}
}
}
protected override void OnElementChanged(ElementChangedEventArgs <Xamarin.Forms.Picker> e)
{
base.OnElementChanged(e);
if (this.Control != null)
{
this.Control.Background = new ColorDrawable(AndroidGraphics.Color.Transparent);
this.Control.SetPadding(4, 0, 0, 0);
if (this.Element is CustomPicker customPicker)
{
this.Control.Gravity = TextAlignmentHelper.ConvertToGravityFlags(customPicker.HorizontalTextAlignment);
if (customPicker.SelectedItem == null && !string.IsNullOrEmpty(customPicker.Placeholder))
{
this.Control.Text = null;
this.Control.Hint = customPicker.Placeholder;
this.Control.SetHintTextColor(customPicker.PlaceholderColor.ToAndroid());
}
}
}
}
