Pass chose value into label inside a table view cell - swift

Question

I'm relatively new into swift and I'm still struggling with some basics. But well thank you all fo helping me in this. Ok when a UITableViewCellis selected a PopUpViewController is presented with a datepicker so the user can select a desire date and when dissmisButtonis pressed the current view is dismissed and as soon that happens I want the selected value to show on the label embedded on the selected UITableViewCell.
Code on PopUpViewController
import UIKit
class PopUpColchonesViewController: UIViewController {
var tipoColchonArray = [String](arrayLiteral: "Individual", "Matrimonial", "King Size")
#IBOutlet weak var tipoColchonLb: UILabel!
#IBOutlet weak var tipoColchonPicker: UIPickerView!
#IBOutlet weak var guardarTipoColchon: UIButton!
var tipoSeleccionado : String?
override func viewDidLoad() {
super.viewDidLoad()
tipoColchonPicker.delegate = self
tipoColchonPicker.dataSource = self
// Do any additional setup after loading the view.
}
#IBAction func guardarTipo(_ sender: Any) {
NotificationCenter.default.post(name: .guardarTipo, object: nil)
dismiss(animated: true, completion: nil)
}
}
extension PopUpColchonesViewController : UIPickerViewDelegate, UIPickerViewDataSource {
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return tipoColchonArray.count
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return tipoColchonArray[row]
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
let selectedItem = tipoColchonArray[row]
tipoSeleccionado = selectedItem
}
}
extension Notification.Name {
static let guardarTipo = Notification.Name(rawValue: "guardarTipo")
}
What I've try so far
var observer : NSObjectProtocol?
var cellServicio = UITableViewCell()
override func viewDidLoad() {
super.viewDidLoad()
servicioHogarTB1.delegate = self
servicioHogarTB1.dataSource = self
servicioHogarTB1.register(UINib(nibName: "ServicioCell", bundle: nil), forCellReuseIdentifier: "servicioCell")
servicioHogarTB1.separatorStyle = .none
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
NotificationCenter.default.addObserver(self, selector: #selector(handlePopupClosing), name: .guardarTipo, object: nil)
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
if let observer = observer {
NotificationCenter.default.removeObserver(observer)
}
print(servicioSeleccionado)
}
#objc func handlePopupClosing (notification : NSNotification) {
let tipoVC = notification.object as? PopUpColchonesViewController
let index = servicioHogarTB1.indexPathForSelectedRow
if let cell = servicioHogarTB1.cellForRow(at: index!) as? ServicioCell {
cell.servicioTipoLb.text = tipoVC?.tipoSeleccionado
}
}
The results so far are error while unwrapping an optional value and the text on label is not shown.

Answer 1

Change your method like this and check ... hopefully it will work
#IBAction func guardarTipo(_ sender: Any) {
dismiss(animated: true, completion: {
NotificationCenter.default.post(name: .guardarTipo, object: nil)
})
}