问Swift与多个with服务通信

EN

@IBAction func GetPolicyListButton(_ sender: Any) {
    //I will need the information from the second web service to display after clicking this button.. how?
}


@IBAction func LoginButton(_ sender: Any) {


    let postString = "cpr=\(usernameField.text!)&password=\(passwordField.text!)"

    let url = URL(string:"http://login")!


    let postData:Data = postString.data(using: String.Encoding.utf8, allowLossyConversion: false)!
    let postLength:String = String(postData.count) as String

    var request:URLRequest = URLRequest(url: url)
    request.httpMethod = "POST"
    request.httpBody = postData
    request.setValue(postLength as String, forHTTPHeaderField: "Content-Length")
    request.setValue("application/json", forHTTPHeaderField: "Accept")

    let task = URLSession.shared.dataTask(with: request) { data, response, error in
        guard let data = data, error == nil else {
            print("error=\(error)")
            return
        }

        let httpStatus = response as? HTTPURLResponse
        print("statusCode should be 200, but is \(httpStatus!.statusCode)")
        print("response = \(response!)")
        print(postString)

        let responseString = String(data: data, encoding: .utf8)
        print("responseString = \(responseString!)")



        let start = responseString!.index(responseString!.startIndex, offsetBy: 75)
        let end = responseString!.index(responseString!.endIndex, offsetBy: -9)
        let range = start..<end

        let jsonStr = responseString!.substring(with: range)
        print(jsonStr)

        let data1 = jsonStr.data(using: .utf8)!

        _ = try? JSONSerialization.jsonObject(with: data1) as? [String: Any]


        let persondata = try? JSONSerialization.jsonObject(with: data, options: .allowFragments)
        let personInfodata = persondata as? [String : Any]

        _ = personInfodata?[""] as? [String : Any]




        if  (responseString?.contains("1001"))!{
            DispatchQueue.main.async {
                print("incorrect - try again")
                let alert = UIAlertController(title: "Try Again", message: "Username or Password Incorrect", preferredStyle: UIAlertControllerStyle.alert)

                alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: nil))


                self.present(alert, animated: true, completion: nil)
            }
        }

        else{
            DispatchQueue.main.async {
                print("correct good")

                let storyboard = UIStoryboard(name: "Maintest", bundle: nil)
                let controller = storyboard.instantiateViewController(withIdentifier: "correctone")
                self.present(controller, animated: true, completion: nil)
            }
        }

    }
    task.resume()


}