pass value from embeded viewcontroller to the Homecontroller - ios

Question

I have the UITextField in the embedded viewcontroller and the button in the main homecontroller. i want to pass the values from the input field to the home controller so that i can check for null values on button click.
the value of UserId and Password should be passed to the HomeController
following is my code
import Foundation
import UIKit
class HomeController: UIViewController, UITextFieldDelegate {
#IBOutlet weak
var loginContainerShadow: UIView!#IBOutlet weak
var login: UIButton!
#IBAction func login(_ sender: Any) {
let myObj: ViewController = self.children.last as!ViewController;
let userid: UITextField = myObj.UserId!as UITextField;
print(userid)
}
override func viewDidLoad() {
super.viewDidLoad()
loginContainerShadow.layer.cornerRadius = 10
loginContainerShadow.layer.shadowColor = (UIColor(red: 0 / 255.0, green: 0 / 138.0, blue: 0 / 140.0, alpha: 7).cgColor)
loginContainerShadow.layer.shadowOffset = CGSize(width: 0, height: 1.75)
loginContainerShadow.layer.shadowRadius = 1
loginContainerShadow.layer.shadowOpacity = 0.45
login.setGradientBackground(colorOne: UIColor(red: 172.0 / 255.0, green: 146.0 / 255, blue: 236.0 / 255.0, alpha: 100), colorTwo: UIColor(red: 109.0 / 255.0, green: 71.0 / 255, blue: 204.0 / 255, alpha: 100))
login.layer.cornerRadius = 25
}
override func touchesBegan(_ touches: Set < UITouch > , with event: UIEvent ? ) {
self.view.endEditing(true)
}
}
import UIKit
class ViewController: UIViewController, UITextFieldDelegate {
var checked = "no";
#IBOutlet
var loginContainerShadow: UIView!
#IBOutlet weak
var UserId: UITextField!{
didSet {
UserId.setBottomBorder()
UserId.delegate = self
}
}
#IBOutlet weak
var Password: UITextField!{
didSet {
Password.setBottomBorder()
Password.delegate = self
}
}
#IBOutlet
var UserIdValidate: UIImageView!#IBOutlet
var PasswordValidate: UIImageView!
override func touchesBegan(_ touches: Set < UITouch > , with event: UIEvent ? ) {
self.view.endEditing(true)
}
override func viewDidLoad() {
super.viewDidLoad()
}
#IBAction func UserIdChanged(_ sender: Any) {
if UserId.text == "" {
UserId.setBottomBorder()
} else {
UserId.setPurpleBottomBorder()
}
}
#IBAction func PasswordChanged(_ sender: Any) {
if Password.text == "" {
Password.setBottomBorder()
} else {
Password.setPurpleBottomBorder()
}
}
#IBOutlet weak
var RememberMe: UIButton!
#IBAction func RemenberMe(_ sender: Any) {
if (checked == "no") {
RememberMe.setImage(UIImage(named: "radio_button_unchecked"),
for: UIControl.State.normal)
checked = "yes"
} else if (checked == "yes") {
RememberMe.setImage(UIImage(named: "proper"),
for: UIControl.State.normal)
checked = "no"
}
}
}