A refactored version of the Xamarin Forms Startup project, "Shell Forms App"., demonstrating ViewModel-First navigation with ZenMvvm. ZenMvvm is a Lightweight ViewModel-First MVVM framework for Xamarin.Forms.
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//ZMin the solution to quickly jump to code comments explaining ZenMvvm => click here to do this now
When browsing the code, look for:
- Simple. Almost nothing new to learn. Design pages as you normally would using Xamarin Forms.
- Cleaner, easier to understand architecture
- Nothing in the code-behind files
- ViewModels are easily testable. This example uses xUnit and Moq to test the ItemsViewModel class.ViewModels don't have any dependency on Xamarin.Forms
- Buit-in dependency injection uses the convenient "Smart Resolve" feature meaning you don't have to register dependenices (perfect for rapid prototyping).
- Passing data to another viewmodel is easy. Navigation from ItemsViewModel that passes an Item object to the NewItemViewModel:
await navigationService.PushAsync<ItemDetailViewModel>(item)- Running async code after page navigation has completed is achieved with
IOnNavigated
For another sample app, see Zenimals which showcases more features, including route navigation with GotoAsync().
