How to check condition if user already registered with phone number or new user while registration, in parsing in swift

问题

I have regButton and verifyOtpButtn for successful registration. in regButton i am giving phone number, for new user i will get otp, after entering otp i need to click verifyOtpButtn, here after successful registration i will get Uid in verifyOtpButtn...

now how to check the user is new user or already registred user while registration. I am able to register new user but unable to check the user is already registered or not.. please help me in the below code.

here i am saving sucessful registered uid in verifyOtpButtn:

  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.regUid = mobileNum["id"] as? String

                        print("otp uid \(String(describing: self.regUid))")

                        DispatchQueue.main.async {
                            KeychainWrapper.standard.set(self.regUid!, forKey: "regUid")
                        }
                        let loginVC = self.storyboard?.instantiateViewController(withIdentifier: "LoginViewController") as! LoginViewController
                        self.present(loginVC, animated: true)
                    }
                }
     }

if i try to check the user is already registred or not while clicking regButton, all the time i am getting only recently registered user id, even for new user also it says user exist why? i am getting correct message from backend but i am unable to check it in frontend?

do{

     let userId: String? = KeychainWrapper.standard.string(forKey: "regUid")
                print("reg userid \(userId)")
                if userId != nil{
                    DispatchQueue.main.async {
                        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
                }
   }

Please help me, how to check if user is already registered or not while registration.

来源：https://stackoverflow.com/questions/58746910/how-to-check-condition-if-user-already-registered-with-phone-number-or-new-user

标签

ios

json

swift

uid