存在以下性质的问题：有必要为应用程序创建一个授权窗口，这是我在以下实现中找到的最合理的解决方案（我必须这样做，因为mainView有一个tabView，如果它在navigationView中，则会出现错误的行为）

struct ContentView: View {

@EnvironmentObject var vm: AppSettings

var body: some View {
    if vm.isLogin {
        MainView()
    } else {
        LoginView()
    }
}

AppSettings看起来像这样：

struct MyApp: App {

    @StateObject var appSetting = AppSettings()

    var body: some Scene {
        WindowGroup {
            ContentView()
                .environmentObject(appSetting)
        }
    }
}
class AppSettings: ObservableObject {
    @Published var isLogin = false
}

默认情况下，将向用户显示一个授权窗口，如下所示：

struct LoginView: View {
    @StateObject var vm = LoginViewModel()
    var body: some View {
        NavigationView {
            VStack {
                TextField("Email", text: $vm.login)
                TextField("Password", text: $vm.password)

                Button {
                    vm.auth()
                } label: {
                    Text("SignIn")
                }
            }
        }
    }
}

最后，loginViewModel看起来像这样：

class LoginViewModel: ObservableObject {

    @Published var login = ""
    @Published var password = ""

  //@Published var appSettings = AppSettings() -- error on the first screenshot
    //or
  //@EnvironmentObject var appSettings: AppSettings -- error on the second screenshot

    func auth() {
        UserAPI().Auth(req: LoginRequest(email: login, password: password)) { response, error in
            if let err = error {
                // Error Processing
            } else if let response = response {
                Defaults.accessToken = response.tokens.accessToken
                Defaults.refreshToken = response.tokens.refreshToken
                self.appSettings.isLogin = true
            }
        }
    }
}

1个错误-Accessing StateObject's object without being installed on a View. This will create a new instance each time
2个错误-No ObservableObject of type AppSettings found. A View.environmentObject(_:) for AppSettings may be missing as an ancestor of this view
我请求帮助，我就是找不到两个observableObject交互的方法。我不得不将所有的逻辑插入到按钮的action中来实现这样的功能
除此功能外，还计划通过在各种情况下将isLogin变量更改为false来实现退出帐户，或使用其他环境变量轻松实现其他功能
为了便于解释情况，我们特意简化了这个例子