Data Pass One View to Another in Swift

Pass Information Forward From One ViewController to 

Another in Swift

** Write in ViewController.swift

import UIKit

class ViewController: UIViewController {

    

    @IBOutlet weak var myTextField: UITextField!

    

    override func viewDidLoad() {

        super.viewDidLoad()

        // Do any additional setup after loading the view, typically from a nib.

    }

    

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

        // Dispose of any resources that can be recreated.

    }

    

    @IBAction func addButtonClicked(_ sender: UIButton){

        

        // Check if value from myTextField is not empty

        if myTextField.text?.isEmpty == true

        {

            return

        }

        

        // Instantiate SecondViewController

        let secondViewController = self.storyboard?.instantiateViewController(withIdentifier: "SecondViewController") as! SecondViewController

        

        // Set "Hello World" as a value to myStringValue

        secondViewController.myStringValue = myTextField.text

        

        // Take user to SecondViewController

        self.navigationController?.pushViewController(secondViewController, animated: true)

        

    }

   

}

** Write in SecondViewController.swift

import UIKit

class SecondViewController: UIViewController {

    var myStringValue:String?

    

    override func viewDidLoad() {

        super.viewDidLoad()

        

        // Do any additional setup after loading the view.

    }

    

    override func viewWillAppear(_ animated: Bool) {

        super.viewWillAppear(animated)

        

        // We will simply print out the value here

        print("The value of myStringValue is: \(myStringValue!)")

    }

    

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

        // Dispose of any resources that can be recreated.

    }

    /*

    // 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.destinationViewController.

        // Pass the selected object to the new view controller.

    }

    */

}