Implementing a CoreLocation wrapper as @ObservedObject
We mentioned in the introduction to the chapter that
@State is used when the state variable has value-type semantics. This is because any mutation of the property creates a new copy of the variable, which triggers a rendering of the view's body, but what about a property with reference semantics?
In this case, we must use a different property wrapper,
@ObservedObject, and the observed object must conform to
ObservableObject. Furthermore, the properties of this object that will be observed in the view must be decorated with
@Published. In this way, when the properties mutate, the view is notified, and the body is rendered again.
This will also help in case we want to bridge iOS foundation objects to the new SwiftUI model, such as
CoreLocation is the iOS framework...