问题描述
我正在关注此Xamarin表单快速入门指南(适用于多屏屏幕的指南)
I'm following this Xamarin Forms quick start guide (the one for multiscreen)
但是当我尝试运行完整的程序时出现此错误
BUT I get this error when I try to run the completed program
没有选择将"NavigationPage"添加到共享库项目中.
There is no option to add a 'NavigationPage' to the shared library project.
有什么想法吗?我正在使用Visual Studio 15.5.2和所有版本的最新版本，包括Windows 10.
Any ideas? I'm using Visual Studio 15.5.2 and latest version of everything including Windows 10.
注意:在本指南中，步骤4不再与Visual Studio匹配
NOTE: in this guide the step 4 no longer matches with Visual studio
不再有跨平台">表单Xaml页面"，而是已被这些选项取代
There is no longer Cross-Platform > Forms Xaml Page, instead it has been replaced with these options
推荐答案
在您的Application子类中(如果由模板创建，通常在App.cs或App.xaml.cs文件中)，将您的第一页包装在NavigationPage页面中，然后现在您将能够推送和弹出页面.
In your Application subclass (normally in the App.cs or App.xaml.cs file if created by template), wrap your first page within a NavigationPage page and now you will be able to push and pop pages.
示例:
MainPage = new YourFirstPage();
将其包装在NavigationPage
MainPage = new NavigationPage(new YourFirstPage());
这篇关于System.InvalidOperationException:Android上不全局支持PushAsync的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！