如何在Xamarin窗体中启用工具栏

using Xamarin.Forms;

public class MyPage : ContentPage
{
    public MyPage()
    {
        // 创建工具栏项
        var saveItem = new ToolbarItem { Icon = "save.png", Command = new Command(OnSave) };
        var deleteItem = new ToolbarItem { Icon = "delete.png", Command = new Command(OnDelete) };

        // 将工具栏项添加到页面
        ToolbarItems.Add(saveItem);
        ToolbarItems.Add(deleteItem);

        // 页面的其他内容
        Content = new StackLayout
        {
            Children = {
                new Label { Text = "Hello, Xamarin.Forms!" }
            }
        };
    }

    private void OnSave()
    {
        // 保存逻辑
    }

    private void OnDelete()
    {
        // 删除逻辑
    }
}

ToolbarItems.Add(new ToolbarItem { Icon = "icon.png", Command = new Command(OnAction), ToolbarPlacement = ToolbarPlacement.Bottom });