This document discusses several popular MVVM frameworks for building cross-platform applications with XAML and .NET/C#, including MVVM Light, Caliburn.Micro, Simple MVVM, ReactiveUI, Catel, and MvvmCross. It provides an overview of key features of each framework such as base view models, command implementations, messaging, navigation, data binding, and cross-platform support. Popular features include shared view models across platforms, model-view-viewmodel patterns, messaging support, and plugins for platform-specific functionality.

1. MVVM FRAMEWORKS
Egor Bogatov. Xamarin developer at Playtika.

2. Какие ваши
преимущества?
•Testability
•Developer-designer workflow
(blendability)

3. Is it popular?

4. Only for С#/XAML?
•WPF / Silverlight / WP8 / Windows
Store / WinForms / iOS / Android /
MAC
•JavaScript (Knockout, etc)
•Java (ZK)

5. MVVM diagram

6. MVVM diagram - details

8. Typical MVVM Framework
•BaseViewModel
•ICommand implementations
•Behaviors
•ValueConverters
•EventAggregator
•IoC (ViewModelLocator)
•Templates, snippets
•“Donate” button

9. Popular MVVM
Frameworks
•MVVM Light
•Caliburn.Micro
•Simple MVVM
•ReactiveUI
•Catel
•MvvmCross
•…

10. MVVM Light
•BaseViewModel
•RelayCommand
•Messanger
Extra:
•EventToCommand
•SimpleIoc

11. Simple MVVM
•AssociateProperties
•AssociateProperties(m => m.FirstName, vm =>
vm.CustomerName);
•ViewModelDetailBase
•BeginEdit - Copy = Model.Clone()
•CancelEdit - Model = Original;
•EndEdit - Copy.CopyValuesTo(Original)
•MessageBus
•“Cross-platform”

12. Caliburn.Micro
• MDD – Magic Driven
Development

17. Caliburn.Micro: a bit more
magic
<Button Content="Let's Talk" cal:Message.Attach="
[Event MouseEnter] = [Action Talk('Hello', Name.Text)];
[Event MouseLeave] = [Action Talk('Goodbye', Name.Text)]" />

18. Caliburn.Micro: tombstone
public class MainPageModelStorage: StorageHandler<MainPageViewModel>
{
public override void Configure()
{
Property(x => x.Name)
.InAppSettings();
}
}

19. Caliburn.Micro: navigation
navigationService.UriFor<Page2ViewModel>()
.WithParam(x => x.Name, "Test")
.Navigate();

20. MvvmCross
•Cross-platform
•PCL ViewModels
•Plugins

21. MvvmCross: navigation
•%Name%ViewModel - %Name%View
•ShowViewModel<FooViewModel>(new {key = “foo”}))
FooViewModel:
public void Init(string key)
{
}

22. MvvmCross: tombstone
•LoadStateBundle
•SaveStateBundle
•bundle.Data[“Name”] = _name;
•bundle.Data[“Id”] = _id;

23. MvvmCross: plugins
•Accelerometer
•Bookmarks
•Color
•DownloadCache
•Email
•File
•Json
•JsonLocalization
•Location
•Messenger
•MethodBinding
•Network
•PhoneCall
•PictureChooser
•Reflection
•ResourceLoader
•Share
•SoundEffects
•Sqlite
•ThreadUtils
•Visibility
•WebBrowser

24. Text binding

25. Command binding