SWIFTUI 绑定未更新

Question

我有一个带有“登录”按钮的主屏幕。单击该按钮，它将弹出一个登录屏幕。登录后，弹出屏幕将被关闭。主屏幕会显示“登录！”我有一个@State boolean var 监控按钮单击，另一个@EnvironmentObject 观察登录状态。如果登录成功，isAnon=false。然后弹出窗口将被关闭。但它现在不起作用。成功登录后，弹出屏幕仍然亮着。我怀疑声明 Binding<Bool>() 在 isAnon=false 时不会更新。这可能吗 ？我错过了哪里？非常感谢！这是代码

    @EnvironmentObject var session: SessionStore
    @State var isSignInClicked: Bool = false
    
    var body: some View {
        if session.isAnon{// if it is anonymous
            Button("Please Sign in to view your activities") {
                isSignInClicked.toggle()
            }
            .popover(isPresented: Binding<Bool>( get: { session.isAnon && isSignInClicked},set: {_ in })){
                LogInView()
            }
        }
        else{// if it's logged in
            Text("Logged In!")
        }
    }
}

Answer 1

正如@Asperi 提到的，使用@Published 表示isAnon。这对我很有效。 这是我的测试代码：

import SwiftUI

@main
struct TestApp: App {
    @StateObject var session = SessionStore()
    var body: some Scene {
        WindowGroup {
            HomeView().environmentObject(session)
        }
    }
}  
    
class SessionStore: ObservableObject {
    @Published var isAnon = true
}

struct HomeView: View {
    @EnvironmentObject var session: SessionStore
    @State var isSignInClicked: Bool = false
    
    var body: some View {
        if session.isAnon {// if it is anonymous
            Button("Please Sign in to view your activities") {
                isSignInClicked.toggle()
            }
            .popover(isPresented: Binding<Bool>( get: { session.isAnon && isSignInClicked},set: {_ in })){
                LogInView()
            }
        }
        else {// if it's logged in
            Text("Logged In!")
        }
    }
} 

EDIT1：包括缺失的测试LoginView

struct LogInView: View {
    @EnvironmentObject var session: SessionStore
    
    var body: some View {
        Text("LogInView here")
            .onDisappear {
                session.isAnon = false
            }
        // alternative using a button
        //        Button("LogInView click me") {
        //            session.isAnon = false
        //        }
    }
}