Integrating Core Data with SwiftUI

Over the years, you may have found different ways of using Core Data in your apps from an architectural point of view. For example, Apple, pre-iOS14, provided Xcode templates that created the Core Data containers in AppDelegate. Other developers prefer to wrap Core Data inside manager classes, abstracting Core Data entirely, while encapsulating the whole Core Data Stack and managed objects in a module, so that it's easy to move to another solution, such as Realm, if needed.

SwiftUI's integration, however, points firmly in one direction: create the container when the app starts, inject it into Environment, and then use it to fetch data or make changes.

When building a new app with Xcode, you can check the Use Core Data checkbox so that Xcode creates a template that injects the Core Data stack in the most efficient way possible.

Although the template provided by Xcode is quite complete and powerful, it is unnecessarily complicated...