delegate not being called in Network class - swift

Question

I am working with stackoverflow api in Worker class I am getting data and adding to tableView. I managed to connect and get the data and I'm trying to add it to the main view controller using a delegate, but the compiler ignores this line, what could be the matter?
When writing to the searchButton procedure, I call a method of the Worker class that receives data from the API and adds it to the array. Then, with the help of a delegate, I return a mass, but this delegate is not called.
class viewController
import UIKit
protocol WorkerDelegate: AnyObject {
func getListModels(noteModels: [CellModel])
}
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, WorkerDelegate{
private var listModels: [CellModel] = []
private var searchText = UITextField()
private var searchButton = UIButton()
private var table = UITableView()
private let worker = Worker()
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .systemBackground
let worker = Worker()
worker.workerDelegate = self
setupSearchText()
setupSearchButton()
table.register(CustomCell.self, forCellReuseIdentifier: "Cell")
table.delegate = self
table.dataSource = self
setupUI()
// Do any additional setup after loading the view.
}
func getListModels(noteModels: [CellModel]) {
listModels += noteModels
table.reloadData()
}
private func setupSearchText() {
searchText.translatesAutoresizingMaskIntoConstraints = false
searchText.font = UIFont.systemFont(ofSize: 14, weight: .bold)
searchText.textColor = .black
searchText.backgroundColor = .white
searchText.borderStyle = UITextField.BorderStyle.roundedRect
searchText.layer.borderWidth = 1
searchText.layer.borderColor = UIColor.black.cgColor
//date.textAlignment = .center
view.addSubview(searchText)
searchText.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor).isActive = true
searchText.leadingAnchor.constraint(
equalTo: view.safeAreaLayoutGuide.leadingAnchor, constant: 20
).isActive = true
searchText.trailingAnchor.constraint(
equalTo: view.safeAreaLayoutGuide.trailingAnchor, constant: -70
).isActive = true
}
private func setupSearchButton() {
searchButton.translatesAutoresizingMaskIntoConstraints = false
// searchButton.font = UIFont.systemFont(ofSize: 14, weight: .bold)
// searchButton.textColor = .black
searchButton.backgroundColor = .white
// searchButton.borderStyle = UITextField.BorderStyle.roundedRect
searchButton.layer.borderWidth = 1
searchButton.setTitle("OK",
for: .normal)
// searchButton.titleLabel?.font = UIFont.systemFont(ofSize: 24)
searchButton.setTitleColor(.black, for: .normal)
searchButton.layer.borderColor = UIColor.black.cgColor
//date.textAlignment = .center
view.addSubview(searchButton)
searchButton.addTarget(self, action: #selector(didSearchButtonnTap(_:)), for: .touchUpInside)
searchButton.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor).isActive = true
searchButton.leadingAnchor.constraint(
equalTo: searchText.safeAreaLayoutGuide.trailingAnchor, constant: 10
).isActive = true
searchButton.trailingAnchor.constraint(
equalTo: view.safeAreaLayoutGuide.trailingAnchor, constant: -20
).isActive = true
}
private func setupUI() {
table.translatesAutoresizingMaskIntoConstraints = false
table.separatorStyle = .none
view.addSubview(table)
table.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
table.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
table.topAnchor.constraint(equalTo: searchText.bottomAnchor,constant: 20).isActive = true
table.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
listModels.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
guard let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as? CustomCell else {
fatalError("не CustomCell")
}
cell.selectionStyle = .none
cell.model = listModels[indexPath.row]
cell.layer.cornerRadius = 14
cell.layer.shadowRadius = 14
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
// нажатие
}
#objc private func didSearchButtonnTap(_ sender: Any) {
worker.fetch(question: searchText.text ?? "")
table.reloadData()
}
}
class Worker
import Foundation
class Worker {
let session: URLSession
var workerDelegate: WorkerDelegate?
func fetch(question: String) {
var listModels: [CellModel] = [CellModel(title: "123",name: "312",date: Date.now, answer_count: Int32(0)
)]
if let url = createURLComponents(question: question) {
url.asyncDownload { data, _, error in
guard let data = data else {
print("URLSession dataTask error:", error ?? "nil")
return
}
do {
let jsonObject = try JSONDecoder().decode(SearchModels.self, from: data)
_ = String(data: data, encoding: .utf8)
for object in jsonObject.items {
let timeInterval = TimeInterval(object.creationDate)
let newDate = Date(timeIntervalSince1970: timeInterval)
var model = CellModel(
title: object.title,
name: object.owner.displayName,
date: newDate,
answer_count: Int32(object.answerCount)
)
listModels.append(model)
}
DispatchQueue.main.async {
self.workerDelegate?.getListModels(noteModels: listModels)
}
} catch {
print(error.localizedDescription)
}
}
}
}
init(
session: URLSession = URLSession(configuration: .default)
) {
self.session = session
}
private func createURLComponents(question: String) -> URL? {
var urlComponents = URLComponents()
urlComponents.scheme = "https"
urlComponents.host = "api.stackexchange.com"
urlComponents.path = "/2.3/search"
urlComponents.queryItems = [
URLQueryItem(name: "order", value: "desc"),
URLQueryItem(name: "sort", value: "activity"),
URLQueryItem(name: "intitle", value: question),
URLQueryItem(name: "site", value: "stackoverflow")
]
return urlComponents.url!
}
private func createURLRequest(question: String) -> URLRequest {
var request = URLRequest(url: createURLComponents(question: question)!)
request.httpMethod = "GET"
return request
}
}
extension URL {
func asyncDownload(completion: #escaping (_ data: Data?, _ response: URLResponse?, _ error: Error?) -> Void) {
URLSession.shared
.dataTask(with: self, completionHandler: completion)
.resume()
}
}