从一个视图控制器向另一个视图控制器发送UISwitch的数据？

Question

我正在创建一个应用程序，用户在应用程序中添加一个人，之后，他们欠该人或该人欠他/她的金额是正确的。因此，虽然编码我有一系列问题所以如果你可以帮助我真的很有帮助。

问题1：我使用UISwitch来了解用户欠款或其他人欠款。因此，根据开启和关闭，如果用户欠款，金额将具有负值，如果其他人欠款，则金额将为正。此外，该值显示在其他viewcontroller上，那么如何传递UISwitch的状态以及如何根据UISwitch的结果使值为负值和正值？

问题2：我想在导航控制器的标题中显示用户的余额（那么用户对该人的欠款总结和显示），那该怎么做呢？

ViewControllers： NewOwedDetailViewController：这是我存储该人的新欠款细节的地方

代码：

import UIKit

class NewOwedDetailViewController: UIViewController {

    @IBOutlet weak var titleTextField: UITextField!
    @IBOutlet weak var locationTextField: UITextField!
    @IBOutlet weak var amountTextField: UITextField!
    @IBOutlet weak var datePicker: UIDatePicker!

    var person: People? 
    var owe: Owe?

    override func viewDidLoad() {
        super.viewDidLoad()

        titleTextField.delegate = self as UITextFieldDelegate
        locationTextField.delegate = self as UITextFieldDelegate
        amountTextField.delegate = self as UITextFieldDelegate

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        titleTextField.resignFirstResponder()
        locationTextField.resignFirstResponder()
        amountTextField.resignFirstResponder()
    }


    @IBAction func saveOwe(_ sender: Any) {
        let name = titleTextField.text
        let location = locationTextField.text
        let amountText = amountTextField.text ?? ""
        let amount = Double(amountText) ?? 0.0
        let date = datePicker.date

        if let owe = Owe(name: name, location: location, amount: amount, date: date) {
            person?.addToRawOwes(owe)

        //Below try function code has save() as throw function so whenever throw function are there you just add try at the beggining of the function
            do {
                try owe.managedObjectContext?.save()

                self.navigationController?.popViewController(animated: true)
            } catch {
                print("Owe details could not be created")
            }
        }
    }


    @IBAction func oweSwitch(_ sender: UISwitch) {

        if sender.isOn {
            owe?.amount = (owe?.amount)! * (-1)
        } else {
            owe?.amount = (owe?.amount)! * (1)
        }

    }


}

extension NewOwedDetailViewController: UITextFieldDelegate {
    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        return true
    }
}

PersonDetailsTableViewController：这是我显示该特定人的历史的所有细节

import UIKit
import ChameleonFramework

class PersonDetailsTableViewController: UITableViewController {

    @IBOutlet weak var personDetailsTableView: UITableView!

    let dateFormatter = DateFormatter()

    var person: People?

    override func viewDidLoad() {
        super.viewDidLoad()

        dateFormatter.timeStyle = .long
        dateFormatter.dateStyle = .long
    }

    override func viewWillAppear(_ animated: Bool) {
        self.personDetailsTableView.reloadData()
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


    @IBAction func addNewOwe(_ sender: Any) {
        performSegue(withIdentifier: "addOweDetails", sender: self)
    }

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        guard let destination = segue.destination as? NewOwedDetailViewController else {
            return
        }

        destination.person = person

    }

    func deleteOwe(at indexPath: IndexPath) {
        guard let owe = person?.owe?[indexPath.row],
            let managedContext = owe.managedObjectContext else {
                return
        }

        managedContext.delete(owe)

        do {
            try managedContext.save()

            personDetailsTableView.deleteRows(at: [indexPath], with: .automatic)
        } catch {
            print("Could not delete owes")

            personDetailsTableView.reloadRows(at: [indexPath], with: .automatic)
        }

    }
}

extension PersonDetailsTableViewController {
    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return person?.owe?.count ?? 0
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = personDetailsTableView.dequeueReusableCell(withIdentifier: "detailsCell", for: indexPath)

        if let owe = person?.owe?[indexPath.row] {
            cell.textLabel?.text = owe.name

            if let amount = person?.owe?[indexPath.row] {
                    cell.detailTextLabel?.text = "₹ \(owe.amount)"
            }
        }

        return cell
    }

    override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
        if editingStyle == .delete {
            deleteOwe(at: indexPath)
        }
    }
}

extension PersonDetailsTableViewController {
    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        performSegue(withIdentifier: "addOweDetails", sender: self)
    }
}

屏幕 PersonDetailsTableViewController NewOwedDetailViewController