Swift example of login

import Foundation
import UIKit

import SwiftyJSON
import SCLAlertView
import SwiftValidator
import Alamofire
import Ipify

class LoginController: UIViewController,ValidationDelegate {

    @IBOutlet weak var login_bgcard: UIView!
    @IBOutlet weak var loginBtn: UIButton!
    @IBOutlet weak var loginbtnVw: UIView!
//
    @IBOutlet weak var uiTableview: UITableView!
    @IBOutlet weak var parentView: UIView!

    @IBOutlet weak var chldView: UIView!
    @IBOutlet var mainView: UIView!


    @IBOutlet weak var domainLabel: UILabel!
    @IBOutlet weak var emailTextOutlet: UITextField!
    @IBOutlet weak var passwordTextOutlet: UITextField!

    @IBOutlet weak var changePassRequestBgCard: UIView!
    @IBOutlet weak var requstpassBtn: UIView!

    @IBOutlet weak var changePassBackToLoginBtn: UIButton!


    @IBOutlet weak var setPassBgCard: UIView!
    @IBOutlet weak var setPasswordBtn: UIView!

     override func viewDidLoad() {

       // get ip address on view load
       if(self.ipaddr.isEmpty){
                self.ipaddr = "127.0.0.1"
                CommonExtentions.getPublicIp(success: {
                    (ip) -> Void in
                    self.ipaddr = ip
                    self.getToken()
                    print("ip is \(ip)  ");

                  }) {
                    (error) -> Void in
                     SCLAlertView().showError("Error!", subTitle: "Unable to get ip address",closeButtonTitle:"OK")
                   }
       }
       self.initValidator()
     }

     func getToken(){

        let parameters: Parameters = [
            "ip_address": self.ipaddr,
            ]
        print("params \(parameters)")
        DispatchQueue.main.async {

            WinparseAPI.requestPOSTURwitoutLoader("Authentication/getToken", params:parameters as [String : AnyObject], headers: [:] , success: {
                (JSONResponse) -> Void in
                print(JSONResponse)
                //                let json = JSON(JSONResponse)
                self.token = JSONResponse["token"].stringValue
                print("token is \(self.token) and json is ");

            }) {
                (error) -> Void in
                SCLAlertView().showError("Error!", subTitle: "Invalid domain url please change",closeButtonTitle:"OK")

            }

        }


     }

     /* Initialize login form validation
     /* Added by rahi
     */
     func initValidator(){

        validator.registerField(self.emailTextOutlet, rules: [RequiredRule(message: "Email address is required")])
        validator.registerField(self.passwordTextOutlet, rules: [RequiredRule(message: "Password is required")])

    }

    func validationSuccessful() {
        // submit the form
        //Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String ?? "",
        let parameters: Parameters = [
            "ip_address": self.ipaddr,
            "token"     : self.token,
            "username"  : self.emailTextOutlet.text ?? "",
            "password"  : self.passwordTextOutlet.text ?? "",
            "device"    : "iphone",
            "device_id"    : UIDevice.current.identifierForVendor!.uuidString,
            ]
        // print("paramas are \(parameters)")
        WinparseAPI.requestPOSTURL("Authentication/postLogin", params:parameters as [String : AnyObject],
           headers: [:] , success: {
            (JSONResponse) -> Void in
            print(JSONResponse)
            if(JSONResponse["status"].intValue==200){

             self.commonExt.setSessionAsString("user_token",JSONResponse["user_token"].stringValue)
             self.commonExt.setSessionAsString("first_name",JSONResponse["first_name"].stringValue)
             self.commonExt.setSessionAsString("last_name",JSONResponse["last_name"].stringValue)
             self.commonExt.setSessionAsString("gender",JSONResponse["gender"].stringValue)
             self.commonExt.setSessionAsString("phone_no",JSONResponse["phone_no"].stringValue)
             self.commonExt.setSessionAsString("city",JSONResponse["city"].stringValue)
             self.commonExt.setSessionAsString("dob",JSONResponse["dob"].stringValue)
             self.commonExt.setSessionAsString("image",JSONResponse["image"].stringValue)
             self.commonExt.setSessionAsString("salt",JSONResponse["salt"].stringValue)

             self.showWInparstoastSuccess(text: "You have logged in successfully");
             let storyboard = UIStoryboard(name: "home", bundle: nil)
             let vc = storyboard.instantiateViewController(withIdentifier: "homepage") as! HomeTabController
             self.present(vc, animated: true, completion: nil)


            }else{
              SCLAlertView().showError("Error!", subTitle: JSONResponse["message"].stringValue,closeButtonTitle:"OK")
            }

        }) {
            (error) -> Void in
            SCLAlertView().showError("Error!", subTitle: "Error connecting to server",closeButtonTitle:"OK")

        }

    }

    func validationFailed(_ errors:[(Validatable ,ValidationError)]) {

        self.showWInparstoast(text: self.commonExt.getFirstErrorMessageOfSwiftValidator(errors)!)
    }



}