Data is not connected to tableView - swift

Question

I'm building an app, which has three tableViews: One for clubs, which leads to another for members and this leads to transactions. The first two tableViews plus their "add" controller are working, whilst the third one isn't. The add controller works as far as I know, because I know that the transaction gets saved to Core Data. But the transaction isn't displayed in the tableView and I have no idea how I can fix this because this is my first App.
The Transaction Vc Code
import UIKit
import MessageUI
import CoreData
class TransactionViewController: UIViewController, MFMailComposeViewControllerDelegate, UITableViewDelegate, UITableViewDataSource {
#IBOutlet weak var tableViewTransaction: UITableView!
let dateFromatter = DateFormatter()
var member: Member?
override func viewDidLoad() {
super.viewDidLoad()
dateFromatter.timeStyle = .long
dateFromatter.dateStyle = .long
}
override func viewWillAppear(_ animated: Bool) {
self.tableViewTransaction.reloadData()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func addNewTransaction(_ sender: Any) {
performSegue(withIdentifier: "newTransaction", sender: self)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
guard let destination = segue.destination as? AddTransactionViewController else {
return
}
destination.member = member
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return member?.transactions?.count ?? 0
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableViewTransaction.dequeueReusableCell(withIdentifier: "transactionCell", for: indexPath)
if let transaction = member?.transactions?[indexPath.row] {
cell.textLabel?.text = transaction.reason
if let date = transaction.date {
cell.detailTextLabel?.text = dateFromatter.string(from: date)
}
}
return cell
}
#IBAction func sendEmail(_ sender: Any) {
let mailComposeVC = configureMailController()
if MFMailComposeViewController.canSendMail() {
self.present(mailComposeVC, animated: true, completion: nil)
} else {
showMailError()
}
}
func configureMailController() -> MFMailComposeViewController {
let mailComposerVC = MFMailComposeViewController()
mailComposerVC.mailComposeDelegate = self
mailComposerVC.setSubject("MAHNUNG")
mailComposerVC.setMessageBody("Hey, ich habe gesehen, dass dein Kontostand in der Buchhaltung zu tief ist. Ich bitte dich daher schnellst möglich mir das Geld zu bringen. Gruss", isHTML: false)
return mailComposerVC
}
func showMailError() {
let senMailErrorAlert = UIAlertController(title: "Could not send email", message: "Dein Gerät konnte die Email nicht senden.", preferredStyle: .alert)
let dismiss = UIAlertAction(title: "Ok", style: .default, handler: nil)
senMailErrorAlert.addAction(dismiss)
self.present(senMailErrorAlert, animated: true, completion: nil)
}
func mailComposeController(_ controller: MFMailComposeViewController, didFinishWith result: MFMailComposeResult, error: Error?) {
controller.dismiss(animated: true, completion: nil)
}
}
The addTransaction Code:
import UIKit
class AddTransactionViewController: UIViewController, UITextFieldDelegate {
#IBOutlet weak var reasonTextField: UITextField!
#IBOutlet weak var amountTextField: UITextField!
#IBOutlet weak var datePicker: UIDatePicker!
var member: Member?
override func viewDidLoad() {
super.viewDidLoad()
reasonTextField.delegate = self
amountTextField.delegate = self
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
reasonTextField.resignFirstResponder()
amountTextField.resignFirstResponder()
}
#IBAction func saveTransaction(_ sender: Any) {
let reason = reasonTextField.text
let date = datePicker.date
let moneyText = amountTextField.text ?? ""
let money = Double(moneyText) ?? 0.0
if let transaction = Trancsaction(money: money, reason: reason, date: date) {
member?.addToRawTransactions(transaction)
do {
try transaction.managedObjectContext?.save()
self.navigationController?.popViewController(animated: true)
} catch {
let alert = UIAlertController(title: "Transaktion konnte nicht gespeichert werden", message: "Bitte wiederholen Sie ihre Eingabe", preferredStyle: .alert)
present(alert, animated: true, completion: nil)
}
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
}
}
Core Data:
import UIKit
import CoreData
#objc(Trancsaction)
public class Trancsaction: NSManagedObject {
var date: Date? {
get {
return rawDate as Date?
}
set {
rawDate = newValue as NSDate?
}
}
convenience init?(money: Double, reason: String?, date: Date?) {
let appDelegate = UIApplication.shared.delegate as? AppDelegate
guard let context = appDelegate?.persistentContainer.viewContext else {
return nil
}
self.init(entity: Trancsaction.entity() , insertInto: context)
self.date = date
self.money = money
self.reason = reason
}
}