MVVM Cross Upgrade to 4.2.2

August 06, 2016

Coming back to MVVMCross and trying to create a new project, I found that some of the documentation available for the new version (4.2.2 at the time of writing this) is no longer correct; for example, the ToDo file in the sample projects still looks like this:

The steps to get this Store UI working are:
Add a reference to your Core PCL project
Change App.Xaml.cs so that it creates a ‘new Setup(RootFrame)’ during its OnLaunched:
 protected override void OnLaunched(LaunchActivatedEventArgs args)
 {
     var rootFrame = Window.Current.Content as Frame;

     // Do not repeat app initialization when the Window already has content,
     // just ensure that the window is active
     if (rootFrame == null)
     {
         // Create a Frame to act as the navigation context and navigate to the first page
         rootFrame = new Frame();

         if (args.PreviousExecutionState == ApplicationExecutionState.Terminated)
         {
             //TODO: Load state from previously suspended application
         }

         // Place the frame in the current Window
         Window.Current.Content = rootFrame;
     }

     if (rootFrame.Content == null)
     {
         // When the navigation stack isn't restored navigate to the first page,
         // configuring the new page by passing required information as a navigation
         // parameter

         var setup = new Setup(rootFrame);
         setup.Initialize();

         var start = MvvmCross.Core.Mvx.Resolve();
         start.Start();
     }
     // Ensure the current window is active
     Window.Current.Activate();
 }
For Windows 8 - Add a views folder and a view - xaml.cs and .xaml based on BasicPage - this will add 5 files to the Common folder.
Change the Common/LayoutAwarePage.cs inheritance to MvvmCross.WindowsStore.Views.MvxStorePage

Change the Common/LayoutAwarePage.cs - remove the OnNavigatedTo and OnNavigatedFrom handlers

Add some content for your Xaml - e.g. 5. For Windows 8.1 - Add a views folder and a view based on the BasicPage template

In the .xaml.cs - remove public NavigationHelper NavigationHelper and all referencing code

In the .xaml.cs - remove the OnNavigatedTo and OnNavigatedFrom handlers

Add some content for your Xaml - e.g.

This document was very useful. I was looking specifically at the Babel project in the above sample; this won’t compile under MvvmCross 4.2.2. I’ve listed here everything I needed to do to make it.

Mvx has now been replaced with MvxSimpleIoCContainer.Instance

In App.xaml.cs:



var start = MvxSimpleIoCContainer.Instance.Resolve<IMvxAppStart>();

Is now:



var start = MvxSimpleIoCContainer.Instance.Resolve<IMvxAppStart>();
start.Start();

In App.cs:



        private void InitializeText()
        {
            var builder = new TextProviderBuilder();
            Mvx.RegisterSingleton<IMvxTextProviderBuilder>(builder);
            Mvx.RegisterSingleton<IMvxTextProvider>(builder.TextProvider);
        }

Is now is a separate plug-in by the looks of things:

The new code is:



        private void InitializeText()
        {            
            var builder = new TextProviderBuilder();
            MvxSimpleIoCContainer.Instance.RegisterSingleton<IMvxTextProviderBuilder>(builder);
            MvxSimpleIoCContainer.Instance.RegisterSingleton<IMvxTextProvider>(builder.TextProvider);
        }