How to pass a JSON decoded Array to another VC on swift - json

Question

well Im trying to pass an array of articles which came from a news API to another VC so I will be able to display them on my TableView, now the problem is that the tableview is loaded before I updated my array, is there a way to update the array before the tableview is loaded?
MY CODE:
MY NewsViewController Code:
import UIKit
import Foundation
class NewsViewController: UITableViewController,NewsProtocol {
func didUpdateNewsArr(arr: [Articles]) {
newsArr = arr
print("I'm loaded first!!")
// print(newsArr[0].title)
}
var newsArr = [Articles]()
var newsManager = NewsManager()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
self.title = "Hot News"
newsManager.newsProtocolDelegate = self
newsManager.performRequest()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(true)
}
}
// MARK: - UITableView Delegate&DataSource Methods:
extension NewsViewController {
// Return the number of rows for the table.
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return newsArr.count
}
// Provide a cell object for each row.
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
// Fetch a cell of the appropriate type.
let cell = tableView.dequeueReusableCell(withIdentifier: "newsCell", for: indexPath)
// Configure the cell’s contents.
cell.textLabel!.text = "Cell text"
return cell
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
}
}
my networking file:
import Foundation
import UIKit
protocol NewsProtocol {
func didUpdateNewsArr(arr: [Articles])
}
struct NewsManager {
let newsURL = "https://newsapi.org/v2/everything?q=apple&from=2020-10-19&to=2020-10-19&sortBy=popularity&apiKey=009a08a56d664f1b92986e9cce27767b"
var newsProtocolDelegate: NewsProtocol?
func performRequest() {
if let url = URL(string: newsURL) {
let session = URLSession(configuration: .default)
let task = session.dataTask(with: url) { (data, respone, error) in
if error != nil {
print(error)
return
}
if let safeData = data {
self.parseJSON(newsData: safeData)
}
}
task.resume()
}
}
func parseJSON(newsData: Data) {
let decoder = JSONDecoder()
do {
let decodedData = try decoder.decode(NewsData.self, from: newsData)
let articlesArr = decodedData.articles
newsProtocolDelegate?.didUpdateNewsArr(arr: articlesArr)
} catch {
print("")
}
}
}

Answer 1

I've solved the problem :) thanks fellas, all was needed was tableView.reload() to reload the cells, due to the fact that the JSON request took a while and the tableView was made up before the request, I've used DispatchQue :)