TableView Cell actions - ios

Question

I have a ViewController, with a list of data from a son file. This page run perfectly. On this page are many pub's with prices. And I want to make another scene (SecondViewController). And every time, when I push a pub from the list I want to display on another scene more information about that place. That run, but when I choose a pub the program shows the information about the first pub from the list, and when I choose another he shows the previous pub, which I choose before. And sorry my english is very bad. Please help me :D
Here is my ViewController:
import UIKit
var nev: [String] = []
var cim: [String] = []
var ar: [String] = []
class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
var myIndex: Int?
#IBOutlet weak var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
let url = Bundle.main.url(forResource: "pubok", withExtension: "json")
do {
let allContactsData = try Data(contentsOf: url!)
let allContacts = try JSONSerialization.jsonObject(with: allContactsData, options: JSONSerialization.ReadingOptions.allowFragments) as! [String : AnyObject]
if let arrJSON = allContacts["Pubok"] {
for index in 0...arrJSON.count-1 {
let aObject = arrJSON[index] as! [String : AnyObject]
nev.append(aObject["Hely neve"] as! String)
cim.append(aObject["Cím"] as! String)
ar.append(aObject["Legolcsóbb sör"] as! String)
}
}
self.tableView.reloadData()
}
catch {
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return nev.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell{
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! TableViewCell
cell.nevLabel.text = nev[indexPath.row]
cell.arLabel.text = ar[indexPath.row] + "/0.5l"
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
myIndex = indexPath.row
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let vc = segue.destination as! SecondViewController
vc.myIndex = myIndex
}
}
Here is my SecondViewController:
import UIKit
class SecondViewController: UIViewController {
myIndex: Int?
#IBOutlet weak var secondnevLabel: UILabel!
#IBOutlet weak var secondcimLabel: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
secondnevLabel.text = nev[myIndex!]
secondcimLabel.text = cim[myIndex!]
}
}
And this is the TableViewCell:
import UIKit
class TableViewCell: UITableViewCell {
#IBOutlet weak var nevLabel: UILabel!
#IBOutlet weak var arLabel: UILabel!
override func awakeFromNib() {
super.awakeFromNib()
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
}
}

Answer 1

Instead of having the global variable myIndex, have a local variable in the second view controller. Use prepare(for segue:) in the first view controller to assign the selected row index to that variable.
ViewController:
class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
#IBOutlet weak var tableView: UITableView!
override func viewDidLoad() {
// etc
}
// Remove didSelectRowAt
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let row = (self.tableView.indexPathForSelectedRow as NSIndexPath?)?.row
let vc = segue.destination as! SecondViewController
vc.myIndex = row
}
SecondViewController:
class SecondViewController: UIViewController {
var myIndex: Int?
#IBOutlet weak var secondnevLabel: UILabel!
#IBOutlet weak var secondcimLabel: UILabel!
// etc