How to know when VC2 was dismissed on VC1? - swift

Question

I have ViewController1 that goes to ViewModel and then to Coordinator to present ViewController2.
The problem is: I need to know when VC2 was dismissed on VC1.
What I need to do: When VC2 is dismissed, I need to reload my table from VC1.
I can not use Delegate since I cant communicate between then (because of Coordinator).
Any help please?
Adding some code: My Coordinator:
public class Coordinator: CoordinatorProtocol {
public func openVC1() {
let viewModel = ViewModel1(coordinator: self)
guard let VC1 = ViewControllerOne.instantiate(storyboard: storyboard, viewModel: viewModel) else {
return
}
navigationController?.pushViewController(VC1, animated: true)
}
public func openVC2() {
let viewModel = ViewModel2()
guard let alertPriceDeleteVC = ViewControllerTwo.instantiate(storyboard: storyboard, viewModel: viewModel) else {
return
}
let nav = UINavigationController(rootViewController: VC2)
navigationController?.present(nav, animated: true, completion: nil)
}
CoordinatorProtocol:
public protocol CoordinatorProtocol {
func openVC1()
func openVC2()
}
My ViewModel1 calling VC2 through coordinatorDelegate:
func openVC2() {
coordinator.openVC2()
}
What I do when I finish ViewController2 and send user back do VC1:
navigationController?.dismiss(animated: true, completion: nil)

Answer 1

You need to to assign delegate value from prepare. Or you can assign delegate with initialize RedScreenVC(self) from your ViewController if u don't want to use storyboard/xib.
import UIKit
class ViewController: UIViewController, NavDelegate {
func navigate(text: String, isShown: Bool) {
print("text: \(text) isShown: \(isShown)")
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if (segue.identifier == "RedScreenVC") {
let redScreenVC = segue.destination as? RedScreenVC
redScreenVC?.delegate = self
}
}
#IBAction func nextPageButtonEventLustener(_ sender: Any) {
performSegue(withIdentifier: "RedScreenVC", sender: sender)
}
}
import UIKit
protocol NavDelegate {
func navigate(text: String, isShown: Bool)
}
class RedScreenVC: UIViewController {
weak var delegate: NavDelegate?
var redView = UIView(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.size.width, height: UIScreen.main.bounds.size.height))
var navigateButton: UIButton = {
let button = UIButton(frame: CGRect(x: 200, y: 350, width: 150, height: 50))
button.setTitle("Navigate", for: .normal)
button.addTarget(self, action: #selector(buttonAction), for: .touchUpInside)
button.backgroundColor = .blue
return button
}()
#objc func buttonAction(){
if self.redView.backgroundColor == .gray {
self.redView.backgroundColor = .systemPink
}
self.delegate.navigate(text:"", isShown: true)
}
override func viewDidLoad() {
navigateButton.layer.cornerRadius = 25
redView.backgroundColor = UIColor.gray
delegate.navigate(text: "Navigation Success", isShown: true)
view.addSubview(redView)
view.addSubview(navigateButton)
}
}
If you do not want to use storyboard.
let redScreenVC = RedScreenVC()
redScreenVC.delegate = self
class RedScreenVC: UIViewController {
override init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: Bundle?) {
super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
init() {
super.init(nibName: nil, bundle: nil)
self.initialize()
}
func initialize() {
self.view.backgroundColor=CustomColor.PAGE_BACKGROUND_COLOR_1
//From here you need to create your email and password textfield
}
}