Tag Archives: Windows Store

MVVM Cross Upgrade to 4.2.2

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:

1. Add a reference to your Core PCL project
2. 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();
}

3. 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:

mvvmcrossupgrade

The new code is:

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

Frame Rate counters on by Default for Windows UWP Emulators

Something that I spotted today (mainly because my app got ‘notes’ during its submission to the store) is the frame rate counter that is on by default for UWP apps. These are the small numbers down the right hand side of the screen:

framerate1

Your app will pass if you submit screenshots with these, but they don’t look good and, as I said, you get ‘Notes’.

To remove them, search you project for this line:

this.DebugSettings.EnableFrameRateCounter = true;

And just comment it out. If you need to see it then you can simply re-enable it when you’ve taken the screenshot.

framerate3

Huzaar!

(the app in question can be found Here