如何全局保存一个人的 UID 以在 Swift 的任何 ViewController 中检索它

Posted 2023-03-15

【中文标题】如何全局保存一个人的 UID 以在 Swift 的任何 ViewController 中检索它

【英文标题】：How to save one person UID globally to retrieve it in any ViewController in Swift

【发布时间】：2019-11-04 09:29:55

【问题描述】：

注册成功后，我得到了LoginViewController中的UID。我将 UID 保存在 LoginViewController 中。我正在RegistrationViewController 中检索 UID。但是在这里我为所有人收到nil，为什么？

请帮我写代码。

将 UID 保存在 LoginViewController:

func logInService()

    let parameters = ["username":Int(userIdTextFielf.text ?? "") as Any,
                      "imei_number":"",
                      "password":passwordTextField.text as Any,
                      "name":"name"]

    let url = URL(string: "https://dev.com/webservices/login")
    var req =  URLRequest(url: url!)
    req.httpMethod = "POST"

    guard let httpBody = try? JSONSerialization.data(withJSONObject: parameters as Any, options: .prettyPrinted) else return
    req.httpBody = httpBody
    let session = URLSession.shared
    session.dataTask(with: req, completionHandler: (data, response, error) in
        if response != nil 
            // print(response)
        
        if let data = data 
            do
                let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as! [String: Any]
                print("the json of loginnnnnn \(json)")
                self.Uid = json["id"] as? Int

                let emailL = json["user_email"] as? String
                KeychainWrapper.standard.set(emailL ?? "", forKey: "user_email")
                KeychainWrapper.standard.set(self.Uid!, forKey: "Uid")
                let saveUserId: Bool = KeychainWrapper.standard.set(self.Uid!, forKey: "Uid")

                DispatchQueue.main.async 

                    let mainStoryBoard = UIStoryboard(name: "Main", bundle: nil)
                    let navigationController = mainStoryBoard.instantiateViewController(withIdentifier: "HomeNavigation")
                    let appDelagate = UIApplication.shared.delegate
                    appDelagate?.window??.rootViewController = navigationController

                
            catch
                print("error")
            
        
    ).resume()

在RegistrationViewController中检索UID：

  @IBAction func registerButton(_ sender: Any) 

        if (nameTextField.text ==  "" || phoneNumTextField.text == "" || passwordTextField.text ==  "" || conformPasswordTextField.text == "")
        
            registerButton.isHidden = false
            sendOtpButton.isHidden = true
            AlertFun.ShowAlert(title: "Title", message: "RequiredAllFields", in: self)
        
        else
            registerButton.isHidden = true
            sendOtpButton.isHidden = false
            otpTextField.isHidden = false
            resendButn.isHidden = false
            DispatchQueue.main.async 
                self.otpTextField.text = self.otpField as? String
            
            registerService()
            otpTimer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(update), userInfo: nil, repeats: true)
        
    

    @IBAction func sendOTPButton(_ sender: Any) 
        otpService()
    

    //MARK:- Service part
    @objc func registerService()
    
    print("register tapped")

    let parameters = ["mobile_number": Int(phoneNumTextField.text ?? "") as Any,
                      "email":emailTextField.text as Any,
                      "password":passwordTextField.text as Any,
                      "name": nameTextField.text as Any]

    let url = URL(string: "https://dev.anyemi.com/webservices/anyemi/register")
    var req =  URLRequest(url: url!)
    req.httpMethod = "POST"

    guard let httpBody = try? JSONSerialization.data(withJSONObject: parameters, options: .prettyPrinted) else return
    req.httpBody = httpBody
    let session = URLSession.shared
    session.dataTask(with: req, completionHandler: (data, response, error) in
        if response != nil 
            // print(response)
        
        if let data = data 
            do
                let userId: Int? = KeychainWrapper.standard.integer(forKey: "Uid")
                print("login userid \(userId)")
                if userId != nil
                    AlertFun.ShowAlert(title: "Title", message: "user exist", in: self)
                
                else
                    let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as! [String: Any]
                    print("the json regggggggggggis \(json)")
                    let phNum = json["mobile_number"] as? Int
                    let status = json["status"] as? String
                    self.otpField = json["otp"] as? Int
                

            catch
                print("error")
            
        
    ).resume()
    
    @objc func otpService()

        let parameters = ["mobile_number": phoneNumTextField.text as Any,
                          "otp": otpTextField.text as Any]
        let url = URL(string: "https://dev.com/webservices/otpverify")
        var req =  URLRequest(url: url!)
        req.httpMethod = "POST"

        guard let httpBody = try? JSONSerialization.data(withJSONObject: parameters, options: .prettyPrinted) else return
        req.httpBody = httpBody

        let session = URLSession.shared

        session.dataTask(with: req, completionHandler: (data, response, error) in
            if response != nil 
                // print(response)
            
            if let data = data 

                do
                    let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as! [String: Any]
                    print("the json of otppppppppp \(json)")
                    DispatchQueue.main.async 
                        if (self.otpTextField.text == String(self.otpField ?? 12))
                            print("registration successfullllll...")
                            let mobileNum = json["mobile_number"] as! [String : Any]
                            //self.Uid = mobileNum["id"] as? String
                            let name = mobileNum["name"] as? String
                            let phNum = mobileNum["username"] as? String
                            print("otp name \(String(describing: name))")
                            print("otp phnumber \(String(describing: phNum))")

                            let loginVC = self.storyboard?.instantiateViewController(withIdentifier: "LoginViewController") as! LoginViewController
                            self.present(loginVC, animated: true)
                        
                        else if self.otpTextField.text == ""
                            AlertFun.ShowAlert(title: "", message: "Please enter OTP", in: self)
                            print("register fail")
                        
                        else 
                            AlertFun.ShowAlert(title: "", message: "Invalid OTP", in: self)
                            print("register fail")
                        
                    
                catch
                    print("error")
                
            
        ).resume()
    
    

我总是要分手，为什么？我在哪里做错了。

【问题讨论】：

请分享您如何从登录导航到注册或登录后您做了什么？

您是否希望在卸载应用时也保存数据？

@Sh_Khan，我需要检查用户是否已经存在或在注册时没有使用 uid...我想要.. 如果用户存在则提醒消息，如果不存在则完成详细信息我点击 regseterButn .. 这将发送 otp .. 进入 otp 后我点击 sendotpbutn ... 这将给出 uid ... 这与登录 uid 相同... 通过使用此 uid 我想在注册时检查用户是否存在.. .

【参考方案1】：

KeychainWrapper 不是保存用户详细信息的好方法。最好使用“UserDefaults”。

【讨论】：

UserDefaults 或 KeychainWrapper 都是一样的..我已经更新了我的帖子..你能给帖子答案