How to get value from table view cell - swift

Question

I need to take price from table view cell
I need to get it another VC
I need to transfer price each time when user selected row
The problem is that I don't know how correctly get the value from tableView
MenueViewController:
import UIKit
class MenueViewController: UIViewController {
#IBOutlet weak var tableView: UITableView!
var dishes: [Dish] = []
var totalSum = 0
override func viewDidLoad() {
super.viewDidLoad()
dishes = createArray()
tableView.delegate = self
tableView.dataSource = self
tableView.backgroundColor = .white
navigationItem.title = "Меню"
}
func createArray() -> [Dish] {
var tempDishes: [Dish] = []
let dish1 = Dish(image: UIImage.init(named: "plovKebab")!, title: "Плов Кебаб", price: 169, type: "Основные Блюда")
let dish2 = Dish(image: UIImage.init(named: "plovKebabShafran")!, title: "Плов Кебаб Шафран", price: 169, type: "Основные Блюда")
tempDishes.append(dish1)
tempDishes.append(dish2)
return tempDishes
}
}
extension MenueViewController: UITableViewDataSource, UITableViewDelegate {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return dishes.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let dish = dishes[indexPath.row]
let cell = tableView.dequeueReusableCell(withIdentifier: "MenueCell") as! MenueCell
cell.setDish(dish: dish)
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let dish = dishes[indexPath.row]
totalSum += dish.price //the place where I tried to take price
print(totalSum)
}
}
VC where we need to take that price:
import UIKit
class OrderViewController: UIViewController {
#IBOutlet weak var totalPriceLabel: UILabel!
var totalPrice: MenueViewController?
var sum:Int?
override func viewDidLoad() {
super.viewDidLoad()
if let price = sum {
totalPriceLabel.text = String(totalPrice?.totalSum)
}
}
The value of sum is 0
How can I get the value?

Answer 1

Please note that the didSelectRowAtIndexpath will not get called before your performSegue. At this link, you can find a detailed explanation including a sample code about your problem and how it can be solved.
Also, there are multiple approaches listed below to solve your problem.
Use willSelectIndexpath and capture the indexpath to pass it in performSegue method
Use didSelectIndexpath and perform segue inside
Use only didSelectIndexpath and perform the navigation logic inside it with out segues