Ios 快速 keys 串更新只有在第二次try 时才起作用

你好，我遇到了一个非常奇怪的问题，iOS密钥链在更新存储在密钥链中的登录信息.因此，如果没有保存的凭据，则运行保存功能会正确地保存日志(log)信息.如果登录信息已经存在，并且用户更新了他们的密码，则更新功能将正确地仅更新密码.但如果登录信息存在，并且我try 更改邮箱(同时保留或更改密码)，则第一次更新不会成功.我必须手动点击两次更新登录信息才能更新登录信息.我try 了下面的代码，只是强制DELETE和SAVE函数运行两次，同时在两次之间添加一个延迟，但这不起作用.唯一有效的方法是按两次"更新"键.我很感激你们的帮助.谢谢.

 delete(email: result.0)
 save(email: email, password: password)
 Timer.scheduledTimer(withTimeInterval: 5.0, repeats: false) { _ in
      delete(email: result.0)
      save(email: email, password: password)
 }

    func save(email: String, password: String) {
        let passwordData = password.data(using: .utf8)!
        
        let query: [String: Any] = [
            kSecClass as String: kSecClassGenericPassword,
            kSecAttrService as String: "https://hustle.page",
            kSecAttrAccount as String: email,
            kSecValueData as String: passwordData
        ]
        let saveStatus = SecItemAdd(query as CFDictionary, nil)
        if saveStatus == errSecDuplicateItem {
            update(email: email, password: password)
        }
    }
    func update(email: String, password: String) {
        if let result = read(service: "https://hustle.page"){
            if result.0 == email {
                let query: [String: Any] = [
                    kSecClass as String: kSecClassGenericPassword,
                    kSecAttrService as String: "https://hustle.page",
                    kSecAttrAccount as String: email
                ]
                let passwordData = password.data(using: .utf8)!
                let updatedData: [String: Any] = [
                    kSecValueData as String: passwordData
                ]
                
                SecItemUpdate(query as CFDictionary, updatedData as CFDictionary)
            } else {
                delete(email: result.0)
                save(email: email, password: password)
                Timer.scheduledTimer(withTimeInterval: 5.0, repeats: false) { _ in
                    delete(email: result.0)
                    save(email: email, password: password)
                }
            }
        }
    }
    func delete(email: String) {
        let query: [String: Any] = [
            kSecClass as String: kSecClassGenericPassword,
            kSecAttrService as String: "https://hustle.page",
            kSecAttrAccount as String: email
        ]
        SecItemDelete(query as CFDictionary)
    }
    func read(service: String) -> (String, String)? {
        let query: [String: Any] = [
            kSecClass as String: kSecClassGenericPassword,
            kSecAttrService as String: service,
            kSecReturnAttributes as String: true,
            kSecReturnData as String: true,
            kSecMatchLimit as String: kSecMatchLimitOne
        ]
        
        var result: AnyObject?
        let status = SecItemCopyMatching(query as CFDictionary, &result)
        
        if status == errSecSuccess, let item = result as? [String: Any] {
            if let account = item[kSecAttrAccount as String] as? String,
               let passwordData = item[kSecValueData as String] as? Data,
               let password = String(data: passwordData, encoding: .utf8) {
               return (account, password)
            }
        }
        return nil
    }  

in the view: 
     Button {
       save(email: email, password: password)
     } label: {
       Text("Update")
     }