Firebase Auth在VisionOS SwiftUI应用重启后自动登出问题求助

我的VisionOS应用原本运行正常，为适配VisionOS将Firebase从8.x版本升级到10.20.0（使用SPM）后，出现了每次重启都会自动登出的问题。相关代码如下：

appnameApp #

@StateObject private var store = Store()

init() {
    // 初始化Firebase
    FirebaseApp.configure()

}

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

ContentView #

@EnvironmentObject var store: Store

switch store.userAuthState {
case .signedIn:
    AppTabView()
        .environmentObject(store)
    
case .signedOut:
    LoginView()
    
case .undefined:
    LoadingView()
    
}

enum UserAuthenticationState {
    case undefined, signedOut, signedIn
}

Store Object #

class Store : ObservableObject {

private var db = Firestore.firestore()

// 会话属性
@Published var userAuthState: UserAuthenticationState = .signedOut

@Published var session: User?
@Published var isEmailVerified = false
@Published var userEmail: String?

init () {
    handle = Auth.auth().addStateDidChangeListener { [self] (auth, user) in
        if let user = user {
            print("StateDidChangeListener")
            self.userEmail = user.email
            self.session = user
            
            if let u = auth.currentUser {
                self.isEmailVerified = u.isEmailVerified
            }
            
            if self.profile == nil {
                self.fetchProfile(uid: user.uid)
            }
            
        } else {
            self.session = nil
            self.userAuthState = .signedOut
        }
    }
}

deinit {
    if let handle = handle {
        Auth.auth().removeStateDidChangeListener(handle)
    }
}
}

目标平台：VisionOS
Firebase版本：10.20.0（SPM）

问题原因及修复方案 #

核心问题分析 #

1. 初始化顺序错误：@StateObject的Store会在appnameApp的init()之前完成初始化，导致Firebase还未配置就启动了Auth状态监听，无法读取本地缓存的用户会话。
2. 状态更新遗漏：当Auth回调检测到已登录用户时，没有将userAuthState设置为.signedIn，初始状态又是.signedOut，导致UI始终显示登录页。

修复步骤 #

1. 调整Firebase与Store的初始化顺序

修改appnameApp，确保先完成Firebase配置，再创建Store实例：

@StateObject private var store: Store

init() {
    FirebaseApp.configure()
    self.store = Store()
}

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

2. 完善Auth状态回调的状态更新

在Store的监听回调中，当检测到用户存在时，明确设置登录状态：

init () {
    handle = Auth.auth().addStateDidChangeListener { [self] (auth, user) in
        if let user = user {
            print("StateDidChangeListener")
            self.userEmail = user.email
            self.session = user
            
            if let u = auth.currentUser {
                self.isEmailVerified = u.isEmailVerified
            }
            
            // 关键：更新为已登录状态
            self.userAuthState = .signedIn
            
            if self.profile == nil {
                self.fetchProfile(uid: user.uid)
            }
            
        } else {
            self.session = nil
            self.userAuthState = .signedOut
        }
    }
}

3. 显式设置Auth持久化策略（可选但推荐）

在Store的init中添加持久化设置，确保VisionOS上会话缓存生效：

init () {
    // 先设置持久化
    Auth.auth().setPersistence(.local) { error in
        if let error = error {
            print("持久化设置失败：\(error.localizedDescription)")
        }
    }
    
    // 再启动状态监听
    handle = Auth.auth().addStateDidChangeListener { [self] (auth, user) in
        // 原有回调逻辑...
    }
}

4. 验证网络权限配置

确保Info.plist中包含Firebase所需的网络权限，避免会话验证失败：

<key>NSAppTransportSecurity</key>
<dict>
    <key>NSExceptionDomains</key>
    <dict>
        <key>firebaseio.com</key>
        <dict>
            <key>NSIncludesSubdomains</key>
            <true/>
            <key>NSAllowsArbitraryLoads</key>
            <true/>
        </dict>
    </dict>
</dict>

完成以上调整后，重启应用时Firebase Auth会正确读取本地缓存的用户会话，状态回调会触发并更新UI状态，解决自动登出问题。

内容的提问来源于stack exchange，提问作者RileyDev