SwiftUI Essentials – iOS 14 Edition

25. SwiftUI Observable and Environment Objects – A Tutorial

The chapter entitled “SwiftUI State Properties, Observable, State and Environment Objects” introduced the concept of observable and environment objects and explained how these are used to implement a data driven approach to app development in SwiftUI.

This chapter will build on the knowledge from the earlier chapter by creating a simple example project that makes use of both observable and environment objects.

25.1 About the ObservableDemo Project

Observable objects are particularly powerful when used to wrap dynamic data (in other words, data values that change repeatedly). To simulate data of this type, an observable data object will be created which makes use of the Foundation framework ...