Initialize @StateObject with a parameter in SwiftUI

Question

I would like to know if there is currently (at the time of asking, the first Xcode 12.0 Beta) a way to initialize a @StateObject with a parameter coming from an

Answer 1

I know there is already an accepted answer here, but I have to agree with @malhal on this one. I think the init is going to get called multiple times, which is the opposite behaviour of @StateObject intentions.

I don't really have a good solution for @StateObjects at the moment, but I was trying to use them in the @main App as the initialisation point for @EnvironmentObjects. My solution was not to use them. I am putting this answer here for people who are trying to do the same thing as me.

I struggled with this for quite a while before coming up with the following:

These two let declarations are at the file level

private let keychainManager = KeychainManager(service: "com.serious.Auth0Playground")
private let authenticatedUser = AuthenticatedUser(keychainManager: keychainManager)

@main
struct Auth0PlaygroundApp: App {

    var body: some Scene {
    
        WindowGroup {
            ContentView()
                .environmentObject(authenticatedUser)
        }
    }
}

This is the only way I have found to initialise an environmentObject with a parameter. I cannot create an authenticatedUser object without a keychainManager and I am not about to change the architecture of my whole App to make all my injected objects not take a parameter.