TableView.delegate unexpectedly found nil - on a child view controller - ios

Question

I have a tableView, that is accessed via a sideMenu where this particular viewController is a child viewController.
For some reason, when I add the tableView.delegate = self, also tableView.dataSource
and register the cell. My app crashes. When I set this view Controller as the initial view controller the table view shows up, however when I return it to my home page, the app crashes, and does not want to load.
My IBOutlets are connected correctly. I even tried connecting the data source and delegate in storyboard.
I have added two types of code for you all to look at, the first, has an IBOutlet, the second I have tried an addSubView(table) however, no table appears.
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(table)
table.delegate = self
table.dataSource = self
table.register(UITableViewCell.self, forCellReuseIdentifier: "cell")
Here is my Wallet View Controller
//
// WalletViewController.swift
// handlwithcare
//
// Created by Charles Morgan on 16/10/2021.
//
import UIKit
import RealmSwift
class WalletViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
let button = UIButton()
#IBOutlet var table: UITableView!
private var data = [AddCardItem]()
override func viewDidLoad() {
super.viewDidLoad()
table.delegate = self
table.dataSource = self
table.register(UITableViewCell.self, forCellReuseIdentifier: "cell")
view.backgroundColor = UIColor(named: "RED")
button.setTitle("Add New Card", for: .normal)
view.addSubview(button)
button.backgroundColor = UIColor(named: "yellow-2")
button.setTitleColor(UIColor(named: "RED"), for: .normal)
button.frame = CGRect(x: 50, y: 800, width: 350, height: 50)
button.layer.cornerRadius = 15
button.addTarget(self, action: #selector(didTapAddButton), for: .touchUpInside)
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return data.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
cell.textLabel?.text = data[indexPath.row].item
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
}
#objc private func didTapAddButton() {
let rootVC = addCardViewController()
let navVC = UINavigationController(rootViewController: rootVC)
navVC.modalPresentationStyle = .fullScreen
present(navVC, animated: true)
}
}
class AddCardItem: Object {
#objc dynamic var item: String = ""
#objc dynamic var date: Date = Date()
}
Here is my Second attempt with a view.addSubView
import UIKit
import RealmSwift
class WalletViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
let button = UIButton()
let table = UITableView()
private var data = [AddCardItem]()
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(table)
table.delegate = self
table.dataSource = self
table.register(UITableViewCell.self, forCellReuseIdentifier: "cell")
view.backgroundColor = UIColor(named: "RED")
button.setTitle("Add New Card", for: .normal)
view.addSubview(button)
button.backgroundColor = UIColor(named: "yellow-2")
button.setTitleColor(UIColor(named: "RED"), for: .normal)
button.frame = CGRect(x: 50, y: 800, width: 350, height: 50)
button.layer.cornerRadius = 15
button.addTarget(self, action: #selector(didTapAddButton), for: .touchUpInside)
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return data.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
cell.textLabel?.text = data[indexPath.row].item
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
}
#objc private func didTapAddButton() {
let rootVC = addCardViewController()
let navVC = UINavigationController(rootViewController: rootVC)
navVC.modalPresentationStyle = .fullScreen
present(navVC, animated: true)
}
}
class AddCardItem: Object {
#objc dynamic var item: String = ""
#objc dynamic var date: Date = Date()
}

Answer 1

Please change the code on the register CELL Tableview.
yourTableView.register(
UINib.init(nibName: "ProductCVC", bundle: nil),
forCellWithReuseIdentifier: "ProductCVC")