SwiftUI - How to pass EnvironmentObject into View Model?

Question

I\'m looking to create an EnvironmentObject that can be accessed by the View Model (not just the view).

The Environment object tracks the application session data, e

Answer 1

The Resolver library does a nice job to get dependency injection for model classes. It provides a property wrapper @Injected which is very similar in spirit to @EnvironmentObject but works everywhere. So in a model, I would inject a XYZService like this:

class SomeModel: ObservableObject {
    @Injected var service: XYZService
}

Such a model I would use as an @EnvironmentObject in the SwiftUI view hierarchy.

It's a little bit involved because you'll have two dependency-injection containers, Resolver/@Injected for everything that's app-wide/service-like and SwiftUI/@EnvironmentObject in the view hierarchy for everything that relates to views/for view models. But in more complex applications it's a very good fit and worthwile the additional complexity. Much better than singletons/XYZService.shared...