Parsed value from array not displayed in tableview - swift

Question

I need to display value -> "all[0].id" into table row.
This value is id 123456 from JSON file.
Code builded without errors, but still without data in table row.
thanks for some suggestions
I parsed JSON File with this values:
{
"fields": {
"123456": {
"timestampValue": "2019-03-05T23:00:00Z"
},
"7895": {
"timestampValue": "2019-03-02T23:00:00Z"
}
},
"createTime": "2019-03-08T00:14:55.357221Z",
"updateTime": "2019-03-08T17:22:08.398718Z"
}
There is my ViewController file with tableview:
import UIKit
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
let data = DataLoader().userData
let all = [Item]()
#IBOutlet weak var tableView: UITableView!
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return all.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
cell.textLabel?.text = all[0].id
return cell
}
override func viewDidLoad() {
super.viewDidLoad()
tableView.dataSource = self
tableView.delegate = self
}
}
There is my Code in DataLoader.swift:
public class DataLoader
{
#Published var userData = [Root]()
init()
{
load()
}
func load()
{
if let fileLocation = Bundle.main.url(forResource: "mydata", withExtension: "json")
{
// Do catch in case of error
do
{
let data = try Data(contentsOf: fileLocation)
let jsonDecoder = JSONDecoder()
let res = try jsonDecoder.decode(Root.self, from: data)
var all = [Item]()
for (id,item) in res.fields {
all.append(Item(id:id,timestampValue:item.timestampValue))
}
print(all)
}
catch
{
print(error)
}
}
}
}