Creating the UWP project

Now let us create the UWP project based on Xamarin.Forms. Add a new Blank App (Windows Universal) project to the solution:

Select the proper version of Windows 10:

Install the Xamarin.Forms package in the NuGet Package Manager:

Or use the command below in the Package Manager Console:

Install-Package MvvmCross.Forms

Then install the MvvmCross.Forms package in the NuGet Package Manager:

Or you can input the command below in the Package Manager Console:

Install-Package MvvmCross.Forms

Then add the references to the MvvmCrossDemo.Core project and the MvvmCrossDemo.Forms.UI project by right-clicking the MvvmCrossDemo.Forms.Uwp project in the solution explorer:

Open the App.xaml.cs file and add a new class with name UWPApplication, as shown below:

public abstract class UWPApplication : MvxWindowsApplication<MvxFormsWindowsSetup<Core.App, UI.App>, Core.App, UI.App, MainPage>
{
}

Update the App class to inherit from UWPApplication class and remove all the other pre-generated methods except for the constructor. Only keep the InitializeComponent() method in the constructor. You can find the source code of this file here: https://github.com/MvvmCross/MvvmCross/blob/develop/ContentFiles/Forms/UWPContent/App.xaml.cs.pp. At last, the App.xaml.cs look like this:

using MvvmCross.Forms.Platforms.Uap.Core;
using MvvmCross.Forms.Platforms.Uap.Views;

namespace MvvmCrossDemo.Forms.Uwp
{
    /// <summary>
    /// Provides application-specific behavior to supplement the default Application class.
    /// </summary>
    sealed partial class App : UWPApplication
    {
        /// <summary>
        /// Initializes the singleton application object.  This is the first line of authored code
        /// executed, and as such is the logical equivalent of main() or WinMain().
        /// </summary>
        public App()
        {
            this.InitializeComponent();
        }
    }

    public abstract class UWPApplication : MvxWindowsApplication<MvxFormsWindowsSetup<Core.App, UI.App>, Core.App, UI.App, MainPage>
    {
    }
}

Accordingly, we need update the App.xaml file to update the base class to make it to inherit from the UWPApplication class, as shown below:

<local:UWPApplication
    x:Class="MvvmCrossDemo.Forms.Uwp.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:MvvmCrossDemo.Forms.Uwp">
</local:UWPApplication>

You can find the code of the App.xaml here: https://github.com/MvvmCross/MvvmCross/blob/develop/ContentFiles/Forms/UWPContent/App.xaml.pp.

Open the MainPage.xaml file and add the reference by this code:

xmlns:forms="using:MvvmCross.Forms.Platforms.Uap.Views"

Change the class of the MainPage to MvxFormsWindowsPage. The result is:

<forms:MvxFormsWindowsPage
    x:Class="MvvmCrossDemo.Forms.Uwp.MainPage"
    xmlns:forms="using:MvvmCross.Forms.Platforms.Uap.Views"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:MvvmCrossDemo.Forms.Uwp"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">

    <Grid>

    </Grid>
</forms:MvxFormsWindowsPage>

You can find the source code of this file here: https://github.com/MvvmCross/MvvmCross/blob/develop/ContentFiles/Forms/UWPContent/MainPage.xaml.pp.

Open the MainPage.xaml.cs and remove the base class of it, like this:

namespace MvvmCrossDemo.Forms.Uwp
{
    /// <summary>
    /// An empty page that can be used on its own or navigated to within a Frame.
    /// </summary>
    public sealed partial class MainPage
    {
        public MainPage()
        {
            this.InitializeComponent();
        }
    }
}

Find the sample code here: https://github.com/MvvmCross/MvvmCross/blob/develop/ContentFiles/Forms/UWPContent/MainPage.xaml.pp.

Now the UWP project based on Xamarin.Forms is done. Launch it and you will see the result: