How to have each UITableViewOption have its own data - ios

Question

I am trying to have each choice in my UITableView to have its own unique set of data. For example, in my table view I have a list of states, then when I click on a state, I want each state to have a list of cities that correspond specifically to it. I have attached my code below, the code is strictly for the UITableView only.
I'm new to Xcode/Swift.
import UIKit
class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
#IBOutlet weak var tableView: UITableView!
let textCellIdentifier = "TextCell"
var states = ["Illinois", "Indiana", "Kentucky", "Michigan", "Ohio", "Pennsylvania", "Wisconsin"]
override func viewDidLoad() {
super.viewDidLoad()
tableView.delegate = self
tableView.dataSource = self
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return states.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: textCellIdentifier, for: indexPath)
let row = indexPath.row
cell.textLabel?.text = states[row]
return cell
}
private func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: IndexPath) {
tableView.deselectRow(at: indexPath as IndexPath, animated: true)
let row = indexPath.row
print(states[row])
}

Answer 1

You can construct array model like this
struct MainItem {
var name:String
var cities:[String]
init(name:String,cities:[String]) {
self.name = name
self.cities = cities
}
}
//
let item1 = MainItem(name:"Illinois",cities:["city1","city2"])
let item2 = MainItem(name:"Indiana",cities:["city3","city4"])
var states = [item1,item2]
//
in cellForRowAt
cell.textLabel?.text = states[row].name
//
in didSelectRowAtIndexPath
let cities = states[row].cities

Answer 2

I recently did this by creating separate classes for each of the delegates I wanted to have. Move all of the table functions into a new class and create an instance of the class in your new controller. In the view did load function set the delegate for the first table. Whenever you switch tables with a button or whatever, do nextTable.delegate = xxxx.
View controller code:
let eventLogTableController = EventLogTableController()
let missedEventLogController = MissedEventTableController()
#IBOutlet weak var emptyTableLabel: UILabel!
#IBOutlet weak var missedEventLog: UITableView!
override func viewDidLoad() {
self.eventLog.delegate = eventLogTableController