Xamarin Forms地图中心和距离更新多个引脚

using Xamarin.Forms;
using Xamarin.Forms.Maps;

public class MapPage : ContentPage
{
    public MapPage()
    {
        // 创建地图控件
        var map = new Map();

        // 设置地图的初始中心位置和缩放级别
        map.MoveToRegion(MapSpan.FromCenterAndRadius(new Position(37.79752, -122.40183), Distance.FromMiles(1)));

        // 创建引脚
        var pin1 = new Pin
        {
            Position = new Position(37.79752, -122.40183),
            Label = "Pin 1",
            Address = "Address 1"
        };

        var pin2 = new Pin
        {
            Position = new Position(37.79752, -122.40183),
            Label = "Pin 2",
            Address = "Address 2"
        };

        // 将引脚添加到地图上
        map.Pins.Add(pin1);
        map.Pins.Add(pin2);

        // 创建按钮，用于更新地图的中心位置和引脚之间的距离
        var updateButton = new Button
        {
            Text = "Update",
            Command = new Command(() =>
            {
                // 更新地图的中心位置
                map.MoveToRegion(MapSpan.FromCenterAndRadius(new Position(37.79752, -122.40183), Distance.FromMiles(2)));

                // 更新引脚的位置
                pin1.Position = new Position(37.79752, -122.40183);
                pin2.Position = new Position(37.79752, -122.40183);
            })
        };

        // 创建布局并将地图和按钮添加到布局中
        var layout = new StackLayout();
        layout.Children.Add(map);
        layout.Children.Add(updateButton);

        // 设置页面的内容为布局
        Content = layout;
    }
}