Xamarin Forms - sectionIndexTitlesForTableView customisation - xamarin.forms

Question

I have a Xamarin Forms app in which the customer really wanted to use the iOS 'scrolling alphabet index' that's not supported on Android
I have therefore two UIs for the platforms, but I am now trying to change the default colour of the text on iOS
I've looked into how to do this and it appears to require customising TableView on iOS platform
How change iOS TableView index Color?
tableView.sectionIndexColor = UIColor.red
tableView.sectionIndexBackgroundColor = UIColor.clear
My question is how do I then consume that in the view? Because the only code required to have it work on ioS can be shown simply by the Xaml
<ListView Grid.Row="1"
x:Name="ItemList"
IsGroupingEnabled="True"
ItemsSource="{Binding allItems}"
GroupDisplayBinding="{Binding Item}"
GroupShortNameBinding="{Binding IndexLetter}"
ItemTapped="Handle_ItemTapped"
CachingStrategy="RecycleElement"
BackgroundColor="Black"
HasUnevenRows="True">
This is a list view, not a table view, so where in the Xamarin Forms could would I reference the Custom Table View Renderer required to alter the colour of the text on iOS?

Answer 1

You could implement it by using Custom Renderer .
using UIKit;
using Xamarin.Forms;
using Xamarin.Forms.Platform.iOS;
using xxx.iOS;
[assembly:ExportRenderer(typeof(ListView),typeof(MyTableViewRenderer))]
namespace xxx.iOS
{
public class MyTableViewRenderer:ListViewRenderer
{
protected override void OnElementChanged(ElementChangedEventArgs<ListView> e)
{
base.OnElementChanged(e);
if(Control!=null)
{
Control.SectionIndexColor = UIColor.Red;
Control.SectionIndexBackgroundColor = UIColor.Clear;
}
}
}
}