Article_007 https://nalexn.github.io/swiftui-observableobject/

Article_007_ObservableObject_07.swift

struct AppState {
    var value1: Int = 0
    var value2: Int = 0
    var value3: Int = 0
}

extension AppState {

    struct Injection: EnvironmentKey {
    
        let appState: CurrentValueSubject<AppState, Never>
        
        static var defaultValue: Self {
            return .init(appState: .init(AppState()))
        }
    }
}

extension EnvironmentValues {

    var injected: AppState.Injection {
        get { self[AppState.Injection.self] }
        set { self[AppState.Injection.self] = newValue }
    }
}

let injected = AppState.Injection(appState: .init(AppState()))
let contentView = ContentView().environment(\.injected, injected)