Unrecognized selector sent to instance 0x7fecc7011000" In Swift - swift

Question

I cannot figure it out why this error is happening unrecognized selector sent to instance 0x7fecc7011000" . I added the all the necessary code but cannot find which selector actually is messing .
Screenshot of the project structure with story board .
The network Manager code .
class NetworkManager {
func getCoins(from url: String, completion: #escaping (Result<VanueResponse, NetworkError>) -> Void ) {
guard let url = URL(string: url) else {
completion(.failure(.badURL))
return
}
URLSession.shared.dataTask(with: url) { data, response, error in
if let error = error {
completion(.failure(.other(error)))
return
}
if let data = data {
//decode
do {
let response = try JSONDecoder().decode(VanueResponse.self, from: data)
completion(.success(response))
} catch let error {
completion(.failure(.other(error)))
}
}
}
.resume()
}
}
Presenter code ..
class VenuePresenter : VanueProtocol{
// creating instance of the class
private let view : VanueViewProtocol
private let networkManager: NetworkManager
private var vanues = [Venue]()
var rows: Int{
return vanues.count
}
// initilanize the class
init(view:VanueViewProtocol , networkmanager:NetworkManager = NetworkManager()){
self.view = view
self.networkManager = networkmanager
}
func getVanue(){
let url = "https://coinmap.org/api/v1/venues/"
networkManager.getCoins(from: url) { result in
switch result {
case.success(let respone):
self.vanues = respone.results
DispatchQueue.main.async {
self.view.resfreshTableView()
}
case .failure(let error):
DispatchQueue.main.async {
self.view.displayError(error.localizedDescription)
print(Thread.callStackSymbols)
}
}
}
}
func getId(by row: Int) -> Int {
return vanues[row].id
}
func getLat(by row: Int) -> Double {
return vanues[row].lat
}
func getCreated(by row: Int) -> Int {
return vanues[row].createdOn
}
func getLon(by row: Int) -> Double? {
return vanues[row].lon
}
}
Protocol code ..
import Foundation
protocol VanueProtocol {
func getVanue()
func getId(by row: Int) -> Int
func getLat(by row: Int) -> Double
func getLon(by row: Int) -> Double?
func getCreated(by row: Int) -> Int
var rows: Int { get }
}
protocol VanueViewProtocol {
func resfreshTableView()
func displayError(_ message: String)
}
Here is the code in view controller .
class ViewController: UIViewController{
private var presenter : VenuePresenter!
#IBOutlet weak var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
tableView.dataSource = self
tableView.delegate = self
presenter = VenuePresenter(view: self)
presenter.getVanue()
}
}
extension ViewController : VanueViewProtocol{
func resfreshTableView() {
tableView.reloadData()
}
func displayError(_ message: String) {
let alert = UIAlertController(title: "Error", message: message, preferredStyle: .alert)
let doneButton = UIAlertAction(title: "Done", style: .default, handler: nil)
alert.addAction(doneButton)
present(alert, animated: true, completion: nil)
}
}
extension ViewController: UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
presenter.rows
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
guard let cell = tableView.dequeueReusableCell(withIdentifier: DisplayView.identifier, for: indexPath) as? DisplayView
else { return UITableViewCell() }
let row = indexPath.row
let id = presenter.getId(by: row)
let lat = presenter.getLat(by: row)
guard let lon = presenter.getLon(by: row) else { return UITableViewCell() }
let createdon = presenter.getCreated(by: row)
cell.configureCell(id: id, lat: lat, lon: lon, createdon: createdon)
return cell
}
}
extension ViewController: UITableViewDelegate {
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return UITableView.automaticDimension
}
}
Here is the code in custom view controller named is display view .
import UIKit
class DisplayView: UITableViewCell{
static let identifier = "DisplayView"
#IBOutlet weak var label1: UILabel!
#IBOutlet weak var label2: UILabel!
#IBOutlet weak var label3: UILabel!
#IBOutlet weak var label4: UILabel!
func configureCell(id: Int ,lat : Double , lon : Double , createdon: Int){
label1.text = String(id)
label2.text = String(lat)
label3.text = String(lon)
label4.text = String(createdon)
}
}
Here is my model .
struct Coin: Codable {
let venues: [Venue]
}
// MARK: - Venue
struct Venue: Codable {
let id: Int
let lat, lon: Double
let category, name: String
let createdOn: Int
let geolocationDegrees: String
enum CodingKeys: String, CodingKey {
case id, lat, lon, category, name
case createdOn = "created_on"
case geolocationDegrees = "geolocation_degrees"
}
}
I added the break point but it retuning nil and it needs to return the data from API . Here is the API link .https://coinmap.org/api/v1/venues/
Here is the screenshot of the error .
Here is the console window .

Answer 1

The problem is this outlet:
IBOutlet weak var tableView: UITableView!
You have hooked it up in the storyboard to the wrong object. It is hooked to the cell, not the table view. It looks like you must have hooked it up and then changed the class of the thing it is hooked to.