Cell Background Color on iOS

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This iOS platform-specific sets the default background color of Cell instances. It's consumed in XAML by setting the Cell.DefaultBackgroundColor bindable property to a Color:

<ContentPage ...
             xmlns:ios="clr-namespace:Xamarin.Forms.PlatformConfiguration.iOSSpecific;assembly=Xamarin.Forms.Core">
    <StackLayout Margin="20">
        <ListView ItemsSource="{Binding GroupedEmployees}"
                  IsGroupingEnabled="true">
            <ListView.GroupHeaderTemplate>
                <DataTemplate>
                    <ViewCell ios:Cell.DefaultBackgroundColor="Teal">
                        <Label Margin="10,10"
                               Text="{Binding Key}"
                               FontAttributes="Bold" />
                    </ViewCell>
                </DataTemplate>
            </ListView.GroupHeaderTemplate>
            ...
        </ListView>
    </StackLayout>
</ContentPage>

Alternatively, it can be consumed from C# using the fluent API:

using Xamarin.Forms.PlatformConfiguration;
using Xamarin.Forms.PlatformConfiguration.iOSSpecific;
...

var viewCell = new ViewCell { View = ... };
viewCell.On<iOS>().SetDefaultBackgroundColor(Color.Teal);

The ListView.On<iOS> method specifies that this platform-specific will only run on iOS. The Cell.SetDefaultBackgroundColor method, in the Xamarin.Forms.PlatformConfiguration.iOSSpecific namespace, sets the cell background color to a specified Color. In addition, the Cell.DefaultBackgroundColor method can be used to retrieve the current cell background color.

The result is that the background color in a Cell can be set to a specific Color:

Screenshot of the Teal group header cells, on iOS