TableView is not loading any JSON data Swift 4 - ios

Question

I have spent about three weeks trying to figure this out. I can get the section title to view, but none of the JSON data is showing. When I do a standard "array" contained in the file, it displays.
I have followed every tip and trick out there and I am stuck.
I think this may have something to do with AnyObject and String, but I am missing something. Please see my code below:
import UIKit
import Alamofire
import SwiftyJSON
class UserTableViewCell: UITableViewCell {
#IBOutlet weak var userFirstname: UILabel!
#IBOutlet weak var userLastname: UILabel!
}
class Profile2VC: UITableViewController {
#IBOutlet var userTable: UITableView!
var usertitles = ["First Name", "Last Name", "Email", "Mobile Number"]
var userinfo = [[String:AnyObject]]() //Array of dictionary
override func viewDidLoad() {
super.viewDidLoad()
let defaultValues = UserDefaults.standard
let URL_USER_LOGIN = "https://www.myapp.com/myphp.php"
let userid = "13"
let parameters: Parameters=["id":coolid]
Alamofire.request(URL_USER_LOGIN, method: .get, parameters:
parameters).responseJSON { (responseData) -> Void in
if((responseData.result.value) != nil) {
let swiftyJsonVar = JSON(responseData.result.value!)
print(swiftyJsonVar)
if let userData = swiftyJsonVar["user"].arrayObject {
self.userinfo = userData as! [[String:AnyObject]]
//debugPrint(userData)
}
if self.userinfo.count > 0 {
self.userTable.reloadData()
}
}
}
self.userTable.reloadData()
// Uncomment the following line to preserve selection between
presentations
// self.clearsSelectionOnViewWillAppear = false
// Uncomment the following line to display an Edit button in the
navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem
}
// MARK: - Table view data source
override func numberOfSections(in tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection
section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return userinfo.count
}
override func tableView(_ tableView: UITableView, titleForHeaderInSection
section: Int) -> String? {
return "Section \(section)"
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath:
IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "LabelCell",
for: indexPath) as! UserTableViewCell
//let userTitles = usertitles[indexPath.row]
let userInfo = userinfo[indexPath.row]
cell.userFirstname?.text = userInfo["first_name"] as? String
cell.userLastname?.text = userInfo["last_name"] as? String
//cell.imageView?.image = UIImage(named: fruitName)
//cell.textLabel?.text = usertitles[indexPath.row]
return cell
}
}

Answer 1

First of all you need to reload your table view in main queue. Check below code:
DispatchQueue.main.async {
self.userTable.reloadData()
}
And you are reloading it multiple times which is not good so Remove unwanted reload code and you final code will be:
Alamofire.request(URL_USER_LOGIN, method: .get, parameters: parameters).responseJSON { (responseData) -> Void in
if((responseData.result.value) != nil) {
let swiftyJsonVar = JSON(responseData.result.value!)
print(swiftyJsonVar)
if let userData = swiftyJsonVar["user"].arrayObject {
self.userinfo = userData as! [[String:AnyObject]]
//debugPrint(userData)
}
if self.userinfo.count > 0 {
DispatchQueue.main.async {
self.userTable.reloadData()
}
}
}
}
//self.userTable.reloadData() //Remove this code
And once your API call done, Make sure debugPrint(userData) is printing some data and then when you are reloading userTable put a breakpoint in cellForRowAt and confirm that it's calling.
Then if its calling and data is there from server, You are good to go.
But if cellForRowAt method didn't called then you need to check your userTable DataSource and Delegate if it's correctly connected or not.

Answer 2

Try this code :
let API = URL(string:"http://www.myapp.com/myphp.php")
let request = URLRequest(url:API!)
let task = URLSession.shared.dataTask(with: request, completionHandler: { (data, response, error) in
if let data = data {
if String(data: data, encoding: String.Encoding.utf8) != nil {
let data = data
let json = try? JSONSerialization.jsonObject(with: data, options: [])
let jsonData = json as! [[String:Any]]
DispatchQueue.main.sync {
let user = jsonData.flatMap { $0["user"] as? String }
print(user)
self.annocumentTableView.reloadData()
}
}
}
})
task.resume()