Problems with swift 5 override func viewWillAppear - swift

Question

So I'm an absolute beginner with xcode 11.4 / swift 5.
I found a tutorial on youtube where I wanted to program.
Here I have a problem that the viewtable is not updated after a new entry.
The database was created successfully and the entries that were entered are also displayed. But as I said, as soon as you create a new entry, you won't see it.
Can you help me find the bug?
Thanks a lot
import UIKit
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
// MARK: - Outlet
#IBOutlet weak var tableView: UITableView!
// MARK: - View - Lifecylce
override func viewDidLoad() {
super.viewDidLoad()
tableView.delegate = self
tableView.dataSource = self
}
override func viewWillAppear(_ animated: Bool) {
CoreDataManager.shared.loadItems()
self.tableView.reloadData()
}
// MARK: - TableView methodes
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return CoreDataManager.shared.getNumberofItems()
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
let todo = CoreDataManager.shared.getTodoItems(index: indexPath.row)
cell.textLabel?.text = todo.name
return cell
}
}
import UIKit
import CoreData
class CoreDataManager {
static let shared = CoreDataManager()
var todos = [Todo]()
let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
private init() {
loadItems()
}
func createObj(name: String) {
let todo = NSEntityDescription.insertNewObject(forEntityName: "Todo", into: context) as! Todo
todo.name = name
todo.completed = false
saveContext()
}
func loadItems() {
let request = NSFetchRequest<Todo>(entityName: "Todo")
do {
todos = try context.fetch(request)
} catch {
print(error.localizedDescription)
}
}
//MARK: - Count Array
func getNumberofItems() -> Int {
return todos.count
}
func getTodoItems(index: Int) -> Todo {
return todos[index]
}
func saveContext(){
do {
try context.save()
} catch {
print(error.localizedDescription)
}
}
}