How to pass data from view controller to data model in swift

I am building a simple app that talks to a web service.

I have used the delegates method to communicate data (from my model to view controller).

But I am not sure how to read the data from view controller (text_field.text) in my model. I need to do that so that I can pass the right parameter to my webservice

my view controller is:

import UIKit

class ViewController: UIViewController,HomeModelDelegate {
    var homeModel = HomeModel()

    @IBOutlet weak var loginid: UITextField!
    @IBOutlet weak var pwd: UITextField!

    @IBAction func submit(_ sender: UIButton) {

        homeModel.chkpwd()
        //Here viewcontroller is assigning itself to the homemodel's delegate property
        homeModel.delegate = self            
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        loginid.layer.cornerRadius=10
        pwd.layer.cornerRadius = 10
    }

    func itemsDownloaded(locations: [Location]) {
        loginid.text = locations[0].pwd
    }
}

My model code is:

import UIKit

protocol HomeModelDelegate{
    func itemsDownloaded(locations:[Location])
}

class HomeModel: NSObject
{
    var delegate:HomeModelDelegate?

    func chkpwd()
    {
        //Hit the webservice url

        let x = ViewController()
        let z = x.loginid

        let serviceUrl = "http://www.xyz.in/webservice.php?loginid=(loginid.text)"

        //download the json data


        let url = URL(string: serviceUrl)

        if let url = url {

            let session = URLSession(configuration: .default)
            let task = session.dataTask(with: url, completionHandler:
            { (data, response, error) in

                if error == nil {

                //succeeded
                self.parseJson(data!)

                }
                else {
                //failed

                }
            })
        task.resume()

        }
    }

    func parseJson(_ data:Data){

        var locArray = [Location]()

        do{
        let jsonArray = try JSONSerialization.jsonObject(with: data, options: []) as! [Any]
            for jsonResult in jsonArray{

                let jsonDict = jsonResult as! [String:String]
                let loc = Location(pwd: jsonDict["loginid"]!, loginid: jsonDict["pwd"]!)

                locArray.append(loc)

                //pass the location back to the delegate

                delegate?.itemsDownloaded(locations: locArray)

            }
        }
        catch{
        print("An error occured")
        }
    }
}