如何从CollectionView更改Entry GotFocus上的标签颜色

<CollectionView ItemsSource="{Binding Items}">
    <CollectionView.ItemTemplate>
        <DataTemplate>
            <Entry Text="{Binding Text}" Placeholder="Enter text" 
                   Focused="Entry_Focused" Unfocused="Entry_Unfocused" />
        </DataTemplate>
    </CollectionView.ItemTemplate>
</CollectionView>

private void Entry_Focused(object sender, FocusEventArgs e)
{
    Entry entry = (Entry)sender;
    Label label = entry.FindByName<Label>("MyLabel"); // 根据需要找到对应的标签控件

    label.TextColor = Color.Red; // 更改标签的颜色为红色
}

private void Entry_Unfocused(object sender, FocusEventArgs e)
{
    Entry entry = (Entry)sender;
    Label label = entry.FindByName<Label>("MyLabel"); // 根据需要找到对应的标签控件

    label.TextColor = Color.Default; // 恢复标签的默认颜色
}