工具栏项目未以xamarin形式显示

Question

我对Xamarin表格几乎是新手.我正在尝试将工具栏项添加到内容页面.

我使用IPAD Air作为部署设备,并使用了服务器的iPhone/ipad模拟器.我参考了XamarinForms-Mobile App pdf文档.虽然它是一个基本的,我不确定,为什么我无法在设备中看到它.请帮助我在哪里犯错误.

public partial class SamplePage : ContentPage   
{
    public SamplePage()
    {
        //Toolbar items
            ToolbarItem scanItem = new ToolbarItem ();
            scanItem.Name = "Scan";
            scanItem.Order = ToolbarItemOrder.Primary;

            ToolbarItem settingsItem = new ToolbarItem ();
            settingsItem.Name = "Settings";
            settingsItem.Order = ToolbarItemOrder.Primary;

            ToolbarItems.Add (scanItem);
            ToolbarItems.Add (settingsItem);
    }
}

App.cs

public class App
    {
        public static Page GetMainPage ()
        {   
            return new SamplePage ();
        }
    }

尝试了xaml的做法.但没有结果.内容页面为空白.

<?xml version="1.0" encoding="UTF-8"?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" x:Class="BLE_Core.BLECorePage">
    <ContentPage.Content>
    </ContentPage.Content>
    <ContentPage.ToolbarItems>
        <ToolbarItem Name = "Scan"></ToolbarItem>
        <ToolbarItem Name = "Settings"></ToolbarItem>
   </ContentPage.ToolbarItems>
</ContentPage>

Answer 1

如果您的应用没有工具栏,则不会显示您的ToolbarItems.添加一个的最简单方法是将页面包装在NavigationPage中

public static Page GetMainPage ()
{   
  return new NavigationPage(new SamplePage ());
}