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 Timer object configured to update a counter once every second. This counter will be published so that it can be observed by views within the app project.
Initially, the data will be treated as an observable object and passed from one view to another. Later in the chapter, the data will be converted to an environment object so that it can be accessed by multiple views without being passed between views.
