Json data not showing on tableView - ios

Question

I´m building a widget for iOS with Swift. The main app´s purpose is to connect to a URL news feed and get the latest news, while the widget only get the title to display in a tableView in the Today view.
I´ve written this method for the widget in order to get the data to populate the table, but for some reason nothing is showing. I´ve tried to debug it, but being a widget it seems to be practically imposible.
This is the cellForRowAt, where I connect to the feed and try to extract data. The funny part is, the main app uses basically the same code and it works perfectly.
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
let urlRequest = URLRequest(url: URL(string: "https://newsapi.org/v1/articles?source=techcrunch&sortBy=top&apiKey=c64849bc30eb484fb820b80a136c9b0a")!)
let task = URLSession.shared.dataTask(with: urlRequest) { (data,response,error) in
do{
let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as! [String: AnyObject]
if let articlesFromJson = json["articles"] as? [[String: AnyObject]] {
if !(error != nil) {
var resultArray: NSMutableArray = NSMutableArray()
for articlesFromJson in articlesFromJson {
if let title = articlesFromJson["title"] as? String{
resultArray.add(title)
}
let array:NSArray = resultArray.reverseObjectEnumerator().allObjects as NSArray
resultArray = array as! NSMutableArray
let title:String = resultArray.object(at: indexPath.row) as! String
cell.textLabel?.text = title
}
}
}
//reload on main thread to speed it up
DispatchQueue.main.async {
self.tableView.reloadData()
}
} catch let error {
print(error)
}
}
task.resume()
return cell
}
If someone can help me figure out where is the mistake it would be a huge help, i´ve been stuck on this issue for days now. Thanks

Answer 1

You want to make your network request outside of cellForRow and then reloadData once it's complete to have the tableView reload the cells which calls cellForRow.
store the array of data outside of request so you can reference it from outside the function.
var resultArray: NSMutableArray = []
override func viewDidLoad() {
super.viewDidLoad()
getData()
}
func getData() {
let urlRequest = URLRequest(url: URL(string: "https://newsapi.org/v1/articles?source=techcrunch&sortBy=top&apiKey=c64849bc30eb484fb820b80a136c9b0a")!)
let task = URLSession.shared.dataTask(with: urlRequest) {[weak self] (data,response,error) in
guard let strongSelf = self else { return }
do{
let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as! [String: AnyObject]
if let articlesFromJson = json["articles"] as? [[String: AnyObject]] {
if error == nil {
for articlesFromJson in articlesFromJson {
if let title = articlesFromJson["title"] as? String{
strongSelf.resultArray.add(title)
}
let array:NSArray = strongSelf.resultArray.reverseObjectEnumerator().allObjects as NSArray
strongSelf.resultArray = array as! NSMutableArray
DispatchQueue.main.async {
strongSelf.tableView.reloadData()
}
} catch let error {
print(error)
}
}
task.resume()
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
let title:String = resultArray.object(at: indexPath.row) as! String
cell.textLabel?.text = title
return cell
}

Answer 2

checks proper if TableView delegate or datasource proper connected. and check array count before load data in cell
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
if (resultArray.count > 0){
let title:String = resultArray.object(at: indexPath.row) as! String
cell.textLabel?.text = title
}
else
{
print("Error: resultArray contain nil value ")
}
return cell
}