SwiftEx

ViewController:

//
//  ViewController.swift
//  MultiView
//
//

import UIKit

class ViewController: UIViewController {

    @IBAction func Go(_ sender: UIButton) {

        self.performSegue(withIdentifier: "goToSecond", sender: self)

    }

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if segue.identifier == "goToSecond" {
            let destination = segue.destination as! SecondViewController
            destination.username = "Test"
        }
    }


    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
    }


}

class ViewController2Class : UIViewController {
    @IBAction func Close(_ sender: UIButton) {
        self.dismiss(animated: true, completion: nil)
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
    }

}


//
//  SecondViewController.swift
//  MultiView
//
//

import UIKit

class SecondViewController: UIViewController {

    var username : String = "myNickName"

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
    }


    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destination.
        // Pass the selected object to the new view controller.
    }
    */

}