大家好，你们能帮帮我吗？我有一个应用程序，有两个ViewController，在第一个VC中，我有四个空的TextField，在第二个VC中，我有四个空的Label，它们应该接收新信息并向我显示标签，但我的代码不工作，所以你能帮助解决这个问题吗？我认为我的personalData有问题

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var name: UITextField!
    
    @IBOutlet weak var age: UITextField!
    
    @IBOutlet weak var city: UITextField!
    
    @IBOutlet weak var mail: UITextField!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let tap = UITapGestureRecognizer(target: self, action: #selector(self.dismissKeyboard))
        view.addGestureRecognizer(tap)
      
    }
    @objc func edit() {
        print("Edit is done")
    }
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        guard segue.identifier == "personalData" else { return }
        guard let destination = segue.destination as? SecondViewController else { return }
        destination.personalData = name.text ?? ""
        destination.personalData = age.text ?? ""
        destination.personalData = city.text ?? ""
        destination.personalData = mail.text ?? ""
    }
    @objc func dismissKeyboard() {
        view.endEditing(true)
    }
    

}
//////////////////////////////////////

import UIKit

class SecondViewController: UIViewController {
    
    
    struct User{
        
    }
    var personalData = ""
    
    
    override func viewDidLoad() {
        super.viewDidLoad()
        firstProfileLabel.text = personalData
        secondProfileLabel.text = personalData
        thirdProfileLabel.text = personalData
        lastProfileLabel.text = personalData
        print("SecondVC", #function)
        navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .edit,
                                                                target: self,
                                                                action: #selector(edit))
    
    }
    @objc func edit() {
             print("Edit is done")
         }
    @IBOutlet weak var firstProfileLabel: UILabel!
    @IBOutlet weak var secondProfileLabel: UILabel!
    @IBOutlet weak var thirdProfileLabel: UILabel!
    @IBOutlet weak var lastProfileLabel: UILabel!
}

我的导师说：“问题出在变量personalData上，该变量是stripe类型，只能存储一个值，如果你想通过变量传递值，而不是直接传递值，可以创建一个结构，例如用户带有变量Name、Age、City等，并使personalData成为用户类型和空数组。”
但我不知道该怎么用代码写。