如何在不使用额外Nuhget包的情况下，在xamarin表单中的可滚动webview上获得一个浮动的Action Button？

using Xamarin.Forms;

namespace YourNamespace
{
    public class WebViewPage : ContentPage
    {
        public WebViewPage()
        {
            var webView = new WebView
            {
                Source = "https://www.example.com"
            };

            var actionButton = new Button
            {
                Text = "Action",
                Command = new Command(PerformAction)
            };

            var scrollView = new ScrollView
            {
                Content = webView
            };

            var stackLayout = new StackLayout
            {
                Children = { scrollView, actionButton }
            };

            Content = stackLayout;
        }

        private void PerformAction()
        {
            // Perform your desired action here
        }
    }
}