MVVM Wiki: https://en.wikipedia.org/wiki/Model%E2%80%93view%E2%80%93viewmodel
- UI elements
- Reacts to and interprets ViewModel through bindings
- Contains no business logic
- Stateless1
- Holds a reference to the ViewModel
- Model interpretation
- Business logic
- Bindable properties
- Domain model dependencies injected as Protocols
- May contain child ViewModels
- Does not know about View
- Anything that provides data or state to the ViewModel
- Does not know about the View or ViewModel
1 No meaningful state is stored within the view. Anything needed by the model layer is immediately sent to the ViewModel from the View.
- Coordinators are aware of the user’s navigation context within the app
- Primarily responsible for Navigation and ViewModel injection
- Can contain child coordinators which are responsible for a narrowed context
- Only object to have a reference to the Dependency Injection container/resolver
- Manages references and lifetimes of registered objects
- Reduces the burden of dependency injection by defining all injections in one place
- Greatly improves the ability to unit test your code by registering contained objects as Protocols which can be substituted with mocks
- Makes sharing observable data throughout the app trivial while keeping each class/service focused and independent
https://github.com/jasonjrr/MVVM.Demo.SwiftUI/releases/tag/3.0.0
https://github.com/jasonjrr/MVVM.Demo.SwiftUI/releases/tag/2.1.0
Version 2.1.0 was built on iOS 14 and solves the navigation problems most developers experiences with NavigationView.