How can I put Json data to the UITableView using Swift 4?

Question

I have this here structured:

struct Excercise: Codable {
    let excerciseID: String
    let excerciseName: String
    let description: String
    let intensity: Int
}

Then, that's the var:

var excercistList = [Excercise]()

And the cellforrowat:

 func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "ExcerciseCell", for: indexPath)
    cell.textLabel?.text = self.excercistList[indexPath.row].excerciseName
    return cell
}

That's the URLSession:

 URLSession.shared.dataTask(with: url) { (data, response, err) in
                        guard let data = data else{return}

   do {
         let excerciseList = try JSONDecoder().decode(Excercise.self, from: data)
         print(excerciseList.excerciseName)
      } catch let jsonErr {
           print("Error", jsonErr)
      }
  }.resume()

I get the right results on the print, but nothing on the table.

What am I doing wrong?

Answer 1

first of all you have to populate your dataSource which is var excercistList = [Excercise]() . After that you have to reload tableView .

URLSession.shared.dataTask(with: url) { (data, response, err) in
                        guard let data = data else{return}

   do {
         let excerciseListFromDecoder = try JSONDecoder().decode(Excercise.self, from: data)
        self.excercistList =  excerciseListFromDecoder
        self.tableView.reloadData()
      } catch let jsonErr {
           print("Error", jsonErr)
      }
  }.resume()

---

You have to be sure that you have set correctly

tableView.delegate = self
tableView.dataSource = self

and the numberOfRowsInSection

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return self.excercistList.count
    }