How do I extract a variable from a UITable DidSelectAtRow? - ios

Question

I have an instance where a user picks from a UITable. The selected record has a name and an id associated with it.
At the moment to verify the name and id are being correctly reported I am using
let tempCountryId = (self.newCountries[cellCountryId!])
print (tempCountryId)
Country(name: Optional("England"), countryId: Optional("5"))
I want to be able to store that countryId in a variable so I can repopulate my UITable with data (Football Divisions) that match the countryId '5'
How do I do this?
This is my full script:
import UIKit
class PickTeamViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
#IBOutlet weak var teamsTableView: UITableView!
var pickedCountryID: Int?
var selectedCellCountryTitle: String?
var cellCountryId: Int?
struct Country {
var name: String?
var countryId: String?
init(_ dictionary: [String : String]) {
self.name = dictionary["name"]
self.countryId = dictionary["id"]
}
}
struct Divisions {
var divisionName: String?
var divisionId: String?
init(_ dictionary: [String : String]) {
self.divisionName = dictionary["name"]
self.divisionId = dictionary["country_id"]
}
}
struct Teams {
var teamName: String?
var newTeamId: String?
init(_ dictionary: [String : String]) {
self.teamName = dictionary["name"]
}
}
struct TeamId {
var newTeamId: String?
init(_ dictionary: [String : String]) {
self.newTeamId = dictionary["id"]
}
}
var newCountries = [Country]()
var newDivisions = [Divisions]()
var newTeams = [Teams]()
var newTeamId = [TeamId]()
override func viewDidAppear(_ animated: Bool) {
let myUrl = URL(string: "http://www.quasisquest.uk/KeepScore/getTeams.php?");
var request = URLRequest(url:myUrl!);
request.httpMethod = "GET";
let task = URLSession.shared.dataTask(with: myUrl!) { (data: Data?, response: URLResponse?, error: Error?) in
DispatchQueue.main.async
{
if error != nil {
print("error=\(error)")
return
}
do{
let json = try JSONSerialization.jsonObject(with: data!, options: .allowFragments) as? [String:Any]
print (json)
if let arr = json?["countries"] as? [[String:String]] {
self.newCountries = arr.flatMap { Country($0) }
self.teamsTableView.reloadData()
}
if let arr = json?["divisions"] as? [[String:String]] {
self.newDivisions = arr.flatMap { Divisions($0) }
}
if let arr = json?["teams"] as? [[String:String]] {
self.newTeams = arr.flatMap { Teams($0) }
}
self.teamsTableView.reloadData()
} catch{
print(error)
}
}
}
task.resume()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.newCountries.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let country = newCountries[indexPath.row]
let cell = UITableViewCell()
cell.textLabel?.text = country.name
cell.textLabel?.font = UIFont(name: "Avenir", size: 12)
cell.textLabel?.textColor = UIColor.black
cell.backgroundColor = UIColor.white
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
cellCountryId = indexPath.row
// print (self.newCountries[cellCountryId!])
let tempCountryId = (self.newCountries[cellCountryId!])
print (tempCountryId)
}
override func viewDidLoad() {
super.viewDidLoad()
self.teamsTableView.delegate = self
self.teamsTableView.dataSource = self
// Do any additional setup after loading the view.
}
}

Answer 1

As discussed in the comments you should use another view controller to show the details. In didSelectRowAtIndexPath method take out the selected country from newCountries array and pass it to the DetailViewController.
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let countryDetailsVC = self.storyboard?.instantiateViewController(withIdentifier: "CountryDetailsViewController") as! DetailViewController
countryDetailsVC.country = selectedCountry
present(countryDetailsVC, animated: true, completion: nil)
}
Now that you have the country Struct you can show its details in the DetailViewController.

Answer 2

Your table is populated from the array newCountries. So, to replace the contents of the table, you would need to replace the contents of newCountries and reload the table.
But that is not a very wise strategy. It would be better to show a different view controller with a different table and a different data array.