Migrated here - Branch v6
Boomerang is a library for MVVM in Swift applications
Due to the lack of *ViewModel concepts in UIKit, Boomerang defines a set of scenarios through protocols and shares a common, reusable way to build screens in the app.
On top of that, it provides a set of extensions for common components (UICollectionView, UITableView, UIViewController) so that they can become compatible with a ViewModel.
Model-View-ViewModel is a design pattern where the view layer is directly bound to a view model, representing its mutable state through time.
The View Model acts as a middle layer between the view and the Model, which should handle every aspect regarding communication with data providers (REST APIs, Database, etc.). Every time the Model layer has some update, the view model should be notified about that, transform the update into ready-to-be-display data for the view and notify it somehow.
The main mechanism involving notification of data updates through time is called data-binding.
Boomerang provides very simple data-binding through closures. However, best results are obtained with reactive frameworks like Combine or RxSwift.
RxSwift compatibility is provided with a separated framework (RxBoomerang)
RxBoomerang uses RxDataSources under the hood to provide data binding to UICollectionView and UITableView
A Combine version is on its way