Populate UITableView from dictionary - ios

Question

I'm trying to make a table from the dictionary I have, but got an error. Since I just learning Swift I don't understand how to fix it. Could you help me please? Thank you for advance.
import UIKit
class TableViewController: UITableViewController {
var DictionaryList = dictionary() {
didSet {
DispatchQueue.main.async {
self.tableView.reloadData()
}
}
}
override func viewDidLoad() {
super.viewDidLoad()
GIDSignIn.sharedInstance()?.presentingViewController = self
GIDSignIn.sharedInstance()?.restorePreviousSignIn()
}
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return DictionaryList.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
let entry = DictionaryList[indexPath.row]
var key = Array<String>(self.dictionary.keys)[indexPath.row]
var value = Array<String>(self.dictionary.values)[indexPath.row]
cell.textLabel?.text = key
cell.detailTextLabel?.text = value
return cell
}
var dictionary: Dictionary = [
"line1:" : "description",
"line2:" : "description",
"line3:" : "description",
]
}

Answer 1

You can try like this:
class TableViewController: UITableViewController {
var DictionaryList: Dictionary<String, String> = [:] {
didSet {
DispatchQueue.main.async {
self.tableView.reloadData()
}
}
}
override func viewDidLoad() {
super.viewDidLoad()
self.DictionaryList = [
"line1:":"description",
"line2:":"description",
"line3:":"description",
]
}
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return DictionaryList.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell")
var key = Array<String>(self.DictionaryList.keys)[indexPath.row]
var value = Array<String>(self.DictionaryList.values)[indexPath.row]
cell?.textLabel?.text = key
cell?.detailTextLabel?.text = value
return cell!
}
}

Answer 2

This is never going to work. Dictionaries are unordered - there is no guarantee by a dictionary that keys is going to preserve the ordering each time it is called. There isn't even a guarantee that values is going to return the values in the same order that it returns the keys.
You will need to re-design your model to turn the dictionary into an ordered collection of some kind.