有没有比ViewModel更好的设置TabbedPage底部选项卡栏高度的方法？

using Android.Content;
using Android.Support.Design.Widget;
using Android.Views;
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;

[assembly: ExportRenderer(typeof(TabbedPage), typeof(YourAppName.Droid.CustomTabbedPageRenderer))]
namespace YourAppName.Droid
{
    public class CustomTabbedPageRenderer : TabbedPageRenderer
    {
        public CustomTabbedPageRenderer(Context context) : base(context)
        {
        }

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

            if (e.NewElement != null)
            {
                var relativeLayout = (ViewGroup)ChildAt(0);
                var bottomNavigationView = (BottomNavigationView)relativeLayout.GetChildAt(1);
                bottomNavigationView.SetMinimumHeight(100); // 设置底部选项卡栏的高度，单位为像素
            }
        }
    }
}

using UIKit;
using Xamarin.Forms;
using Xamarin.Forms.Platform.iOS;

[assembly: ExportRenderer(typeof(TabbedPage), typeof(YourAppName.iOS.CustomTabbedRenderer))]
namespace YourAppName.iOS
{
    public class CustomTabbedRenderer : TabbedRenderer
    {
        protected override void OnElementChanged(VisualElementChangedEventArgs e)
        {
            base.OnElementChanged(e);

            if (e.NewElement != null)
            {
                TabBar.Frame = new CoreGraphics.CGRect(TabBar.Frame.X, TabBar.Frame.Y, TabBar.Frame.Width, 100); // 设置底部选项卡栏的高度，单位为点（point）
            }
        }
    }
}

using Xamarin.Forms;

namespace YourAppName
{
    public class App : Application
    {
        public App()
        {
            MainPage = new CustomTabbedPage(); // 使用自定义的TabbedPage
        }
    }

    public class CustomTabbedPage : TabbedPage
    {
        public CustomTabbedPage()
        {
            // 添加选项卡页
            Children.Add(new Page1());
            Children.Add(new Page2());
            Children.Add(new Page3());
        }
    }

    public class Page1 : ContentPage
    {
        public Page1()
        {
            Content = new StackLayout
            {
                Children = {
                    new Label { Text = "Page 1" }
                }
            };
        }
    }

    public class Page2 : ContentPage
    {
        public Page2()
        {
            Content = new StackLayout
            {
                Children = {
                    new Label { Text = "Page 2" }
                }
            };
        }
    }

    public class Page3 : ContentPage
    {
        public Page3()
        {
            Content = new StackLayout
            {
                Children = {
                    new Label { Text = "Page 3" }
                }
            };
        }
    }
}