问题

以下是您提供的代码的中文翻译部分：

我正在尝试为我的应用程序实现Google登录选项，但我一直遇到错误。

我在网上搜索了一下这个错误的含义，但有人说它是由于参数名称错误引起的。

但我不认为参数名称有问题。

这是我的代码：

private func googleLogIn() {
    guard let clientID = FirebaseApp.app()?.options.clientID else { return }
    
    let config = GIDConfiguration(clientID: clientID)
    
    GIDSignIn.sharedInstance.signIn(with: config, presenting: self) { [unowned self] user, error in
        
        if let error = error {
            print("\(error.localizedDescription)")
            return
        }
        
        guard let email = user?.profile?.email,
              let firstName = user?.profile?.givenName,
              let lastName = user?.profile?.familyName else {
                  return
              }
        
        UserDefaults.standard.set(email, forKey: Keys.email.rawValue)
        UserDefaults.standard.set("\(firstName) \(lastName)", forKey: Keys.name.rawValue)
        
        DatabaseManager.shared.userExists(with: email) { exists in
            if !exists {
                
                let chatUser = ChatAppUser(firstName: firstName,
                                           lastName: lastName,
                                           emailAddress: email)
                DatabaseManager.shared.insertUser(with: chatUser) { success in
                    if success {
                        
                        // 上传图片
                        
                        if ((user?.profile?.hasImage) != nil) {
                            guard let url = user?.profile?.imageURL(withDimension: 200) else {
                                return
                            }
                            
                            URLSession.shared.dataTask(with: url) { data, _, _ in
                                guard data != nil else {
                                    return
                                }
                                
                                let filename = chatUser.profilePictureFileName
                                StorageManager.shared.uploadProfilePicture(with: data,
                                                                           filename: filename) { result in
                                    switch result {
                                    case .success(let downloadUrl):
                                        UserDefaults.standard.set(downloadUrl, forKey: Keys.profilePictureUrl.rawValue)
                                        print(downloadUrl)
                                    case .failure(let error):
                                        print(error)
                                    }
                                }
                            }.resume()
                        }
                    }
                }
            }
        }
        
        guard let authentication = user?.authentication,
              let idToken = authentication.idToken else {
                  return
              }
        
        let credential = GoogleAuthProvider.credential(withIDToken: idToken,
                                                       accessToken: authentication.accessToken)
        
        FirebaseAuth.Auth.auth().signIn(with: credential) { [weak self] authResult, error in
            guard let strongSelf = self else {
                return
            }
            
            guard authResult != nil, error == nil else {
                if let error = error {
                    print("使用Google登录失败：\(error)")
                }
                return
            }
            print("成功登录用户")
            NotificationCenter.default.post(name: .didLogInNotification, object: nil)
            strongSelf.navigationController?.dismiss(animated: true, completion: nil)
        }
    }
}

您提供的代码翻译完成。如果您有任何其他问题或需要进一步帮助，请随时提出。

private func googleLogIn() {
guard let clientID = FirebaseApp.app()?.options.clientID else { return }
let config = GIDConfiguration(clientID: clientID)
GIDSignIn.sharedInstance.signIn(with: config, presenting: self) { [unowned self] user, error in
if let error = error {
print("\(error.localizedDescription)")
return
}
guard let email = user?.profile?.email,
let firstName = user?.profile?.givenName,
let lastName = user?.profile?.familyName else {
return
}
UserDefaults.standard.set(email, forKey: Keys.email.rawValue)
UserDefaults.standard.set("\(firstName) \(lastName)", forKey: Keys.name.rawValue)
DatabaseManager.shared.userExists(with: email) { exists in
if !exists {
let chatUser = ChatAppUser(firstName: firstName,
lastName: lastName,
emailAddress: email)
DatabaseManager.shared.insertUser(with: chatUser) { success in
if success {
// upload image
if ((user?.profile?.hasImage) != nil) {
guard let url = user?.profile?.imageURL(withDimension: 200) else {
return
}
URLSession.shared.dataTask(with: url) { data, _, _ in
guard let data = data else {
return
}
let filename = chatUser.profilePictureFileName
StorageManager.shared.uploadProfilePicture(with: data,
filename: filename) { result in
switch result {
case .success(let downloadUrl):
UserDefaults.standard.set(downloadUrl, forKey: Keys.profilePictureUrl.rawValue)
print(downloadUrl)
case .failure(let error):
print(error)
}
}
}.resume()
}
}
}
}
}
guard let authentication = user?.authentication,
let idToken = authentication.idToken else {
return
}
let credential = GoogleAuthProvider.credential(withIDToken: idToken,
accessToken: authentication.accessToken)
FirebaseAuth.Auth.auth().signIn(with: credential) { [weak self] authResult, error in
guard let strongSelf = self else {
return
}
guard authResult != nil, error == nil else {
if let error = error {
print("Failed to sign in with Google: \(error)")
}
return
}
print("Successfully logged user in")
NotificationCenter.default.post(name: .didLogInNotification, object: nil)
strongSelf.navigationController?.dismiss(animated: true, completion: nil)
}
}
}

答案1

得分: 1

要调试"模糊"错误，请简化代码，直到错误消失，并查看是什么导致了它。例如，删除每个闭包的整个内容，看看错误是否消失。然后逐步添加片段。删除已知无误的部分，以简化其余表达式，并帮助编译器提供更好的错误信息。将各个片段提取到函数中，这通常会提供更好的错误消息（而且是更好的代码）。即使没有错误，多个嵌套闭包的单个 85 行方法也应该拆分开来。