如何在XAMARIN中更改Picker占位符的颜色？

Question

如何在XARARIN中为ANDROID和iOS更改Picker占位符的颜色？ PlaceholderColor =“white”不起作用。

            <Picker Title="Search items"  TextColor="White"
            PlaceholderColor = "white"
            VerticalOptions="Start">
            <Picker.Items>
                <x:String>Item1</x:String>
                <x:String>item2</x:String>
                <x:String>item3</x:String>
            </Picker.Items>
        </Picker>

Answer 1

您需要一个自定义渲染器：

[assembly: ExportRenderer(typeof(Picker), typeof(CustomPicker))]
namespace Droid
{
    public class CustomPicker : PickerRenderer
    {

        protected override void OnElementChanged(ElementChangedEventArgs<Picker> e)
        {
            base.OnElementChanged (e);

            if (Control != null) 
                Control.SetHintTextColor (Android.Graphics.Color.Rgb(1,2,3));

        }

    }

}

Answer 2

在iOS中，您可以在自定义渲染器中执行类似操作。

Control.AttributedPlaceholder = 
    new NSAttributedString (Control.AttributedPlaceholder.Value, foregroundColor: UIColor.White);