如何使用mvvmcross从Xamarin表单视图模型导航

Question

基于MvvmCross，我需要将MainViewModel导航到TestViewModel，这是我的代码，它不能正常工作

MainViewModel：

 //Command_SJCJ is a button in MainPage
  public IMvxCommand Command_SJCJ
        {
            get
            {
                return new MvxCommand(() =>
                    _navigationService.Navigate<TestViewModel>());
            }
        }

TestViewModel：

 public class TestViewModel:MvxViewModel
            {
                private IMvxNavigationService _navigationService;
                public TestViewModel(IMvxNavigationService navigation)
                {
                    _navigationService = navigation;
                }
            }
        }

TestPage.xaml：

 <?xml version="1.0" encoding="utf-8" ?>
        <views:MvxWindowsPage xmlns="http://xamarin.com/schemas/2014/forms"
                              xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
                              xmlns:controls="clr-namespace:Esri.ArcGISRuntime.UI.Controls;assembly=Esri.ArcGISRuntime"
                              xmlns:views="using:MvvmCross.Uwp.Views"
                              x:Class="nsc.hby.Survey.UWP.Pages.TestPage">
            <views:MvxWindowsPage.Content>
                <controls:MapView/>
            </views:MvxWindowsPage.Content>
       </views:MvxWindowsPage>

Answer 1

这就是导航在mvvmcross 5中的工作方式

public class MainViewModel : MvxViewModel
{
    public ICommand GoCommand
    {
        get
        {
            return new MvxCommand(() => ShowViewModel<TestViewModel>();
        }
    }
}



public class TestViewModel : MvxViewModel
{
}