Xamarin形成覆盖图像作为背景，并在不同方向放置标签

using Xamarin.Forms;

public class BackgroundImagePage : ContentPage
{
    public BackgroundImagePage()
    {
        // 创建一个 Image 控件作为背景
        var backgroundImage = new Image
        {
            Source = "background.jpg",
            Aspect = Aspect.Fill
        };

        // 创建一个 StackLayout 来排列标签
        var stackLayout = new StackLayout
        {
            Orientation = StackOrientation.Vertical,
            HorizontalOptions = LayoutOptions.Center,
            VerticalOptions = LayoutOptions.CenterAndExpand
        };

        // 添加标签到 StackLayout
        stackLayout.Children.Add(new Label
        {
            Text = "Label 1",
            TextColor = Color.White,
            FontSize = 20
        });

        stackLayout.Children.Add(new Label
        {
            Text = "Label 2",
            TextColor = Color.White,
            FontSize = 20
        });

        // 创建一个 AbsoluteLayout 来放置背景图像和 StackLayout
        var absoluteLayout = new AbsoluteLayout();
        AbsoluteLayout.SetLayoutFlags(backgroundImage, AbsoluteLayoutFlags.All);
        AbsoluteLayout.SetLayoutBounds(backgroundImage, new Rectangle(0, 0, 1, 1));
        absoluteLayout.Children.Add(backgroundImage);

        AbsoluteLayout.SetLayoutFlags(stackLayout, AbsoluteLayoutFlags.None);
        AbsoluteLayout.SetLayoutBounds(stackLayout, new Rectangle(0.5, 0.5, 0.8, 0.8));
        absoluteLayout.Children.Add(stackLayout);

        // 将 AbsoluteLayout 设置为 ContentPage 的内容
        Content = absoluteLayout;
    }
}