Swift 5; pushViewController is not working - swift

Question

I'm testing Swift and I created a table list to show JSON data, now I would like to show details for each cell, clicking on it, into a new View Controller.
Testing the App I got the click on the cell but I don't see the new View.
This is the code capturing the click into the ViewController.swift:
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource
{
private let tableView: UITableView = {
let table = UITableView(frame: .zero,
style: .grouped)
table.register(UITableViewCell.self,
forCellReuseIdentifier: "cell")
return table
}()
private let tableView: UITableView = {
let table = UITableView(frame: .zero,
style: .grouped)
table.register(UITableViewCell.self,
forCellReuseIdentifier: "cell")
return table
}()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
parseJSON()
view.addSubview(tableView)
tableView.frame = view.bounds
tableView.delegate = self
tableView.dataSource = self
}
....
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if let vc = storyboard?.instantiateViewController(withIdentifier: "Detail") as? DetailViewController {
vc.selectedImage = "images/logo_2-mini.png"
print("Click \(indexPath) " + vc.selectedImage!) // I see it!
navigationController?.pushViewController(vc, animated: true) // I don't see it
}
}
}
This is the DetailViewController
import UIKit
class DetailViewController: UIViewController {
#IBOutlet weak var imageView: UIImageView!
var selectedImage: String?
override func viewDidLoad() {
super.viewDidLoad()
print("Pre")
if let imageToLoad = selectedImage{
imageView.image = UIImage(named: imageToLoad)
print("ok")
}
}
}
I'm too newbie with swift! Can you help me here?

Answer 1

If you want to show the DetailViewController you should change your code to
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
guard let vc = storyboard.instantiateViewController(withIdentifier: "Detail") as? DetailViewController else { return }
vc.selectedImage = "images/logo_2-mini.png"
print("Click \(indexPath) " + vc.selectedImage!) // I see it!
self.present(vc, animated: true)
}
This way you don't need to embed your ViewController into a navigation controller.
Also, I've created the storyboard variable since I don't see its declaration in your code.