SwiftyJSON and Alamofire data parsing in TableView (iOS, Swift 4) - ios

Question

When I run my project I am just able to get only tableView but datas are not fetched its blank. The struct codable and view controller codes were as follows. Please help me in viewing the datas in my tableView cells using alamofire and SwiftyJSON,
class Loads: Codable {
let loads: [Load]
init(loads: [Load]) {
self.loads = loads
}
}
class Load: Codable {
let id: String
let ad_title: String
let ad_description:String
let ad_price: String
let ad_post_date: String
let image1: String
init(ad_title: String, ad_description: String, ad_price: String, ad_post_date: String, image1: String) {
self.ad_title = ad_title
self.ad_description = ad_description
self.ad_price = ad_price
self.ad_post_date = ad_post_date
self.image1 = image1
}
}
View Controller codes:
import UIKit
import SwiftyJSON
import Alamofire
class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
var loads = [Load]()
#IBOutlet weak var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
downloadJson()
self.tableView.reloadData()
tableView.delegate = self
tableView.dataSource = self
}
func tableView(_ tableView: UITableView, numberOfRowsInSection
section: Int) -> Int {
return loads.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath:
IndexPath) -> UITableViewCell {
guard let cell = tableView.dequeueReusableCell(withIdentifier: "LoadCell") as? LoadCell else { return UITableViewCell() }
cell.labelA.text = loads[indexPath.row].ad_title
cell.labelB.text = loads[indexPath.row].ad_price
cell.labelC.text = loads[indexPath.row].ad_description
cell.labelD.text = loads[indexPath.row].ad_post_date
if let imageURL = URL(string: loads[indexPath.row].image1) {
DispatchQueue.global().async {
let data = try? Data(contentsOf: imageURL)
if let data = data {
let image = UIImage(data: data)
DispatchQueue.main.async {
cell.loadImage.image = image
}
}
}
}
return cell
}
func downloadJson(){
Alamofire.request("https://alot.ae/api/classifiedcomputerlaptop.php").responseJSON { response in
if let value = response.result.value {
let json = JSON(value)
//Printing strings from a JSON Dictionary
print(json[0]["ad_title"].stringValue)
print(json[0]["ad_price"].stringValue)
print(json[0]["ad_description"].stringValue)
print(json[0]["ad_post_date"].stringValue)
print(json[0]["image1"].stringValue)
}
self.tableView.reloadData()
}
self.tableView.reloadData()
}
}
I am using xcode9, swift 4.

Answer 1

datas are not fetched its blank
Your code does not seem to update var loads by downloaded data, that is why you just get blank table view. So, you need to assign fetched data to var loads.
Here is sample:
Alamofire.request("https://alot.ae/api/classifiedcomputerlaptop.php").responseJSON { response in
// you should assign response data into var loads here
if let data = response.data {
do {
self.loads = try JSONDecoder().decode([Load].self, from: data)
} catch {
// exception
}
}
}
And after that, self.tableView.reloadData().
PS: Of course I don't know your response JSON format and your source code overall, so it might not be a directory answer to your question, but I hope it will help!

Answer 2

At first glance, the url looks faulty to me. https is typed twice, please remove once in below line.
Change this :
Alamofire.request("https:https://alot.ae/api/classifiedcomputerlaptop.php").responseJSON
to :
Alamofire.request("https://alot.ae/api/classifiedcomputerlaptop.php").responseJSON

Answer 3

First off, your...
struct codable
... is not a struct at all, it is a class. change that to an actual struct.
Second, you start downloading before your delegate and datasource are set to the tableview.
override func viewDidLoad() {
super.viewDidLoad()
tableView.delegate = self
tableView.dataSource = self
downloadJson()
}
Thirdly, you are using Alamofire for a simple GET request, but you ignore the fact of asyncronous loading of images for a cell, which you do with Data. I'd suggest to use AlamoFireImageDownloader or remote AlamoFire all together. Using URLSession is just as easy:
private func request(url: URL, completionHandler: #escaping ((Data?, URLResponse?, Error?) -> Void)) {
var request = URLRequest(url: url)
request.httpMethod = "GET"
let task = URLSession.shared.dataTask(with: request, completionHandler: completionHandler)
task.resume()
}
Fourth, I don't believe you need the loads codable.
Just an extra reminder, depending on the amount of Loads you'll have in your table, you will get problems with the loading of your images. The closures are not guaranteed to finish in order, but when they do they will update the cell regardless to whether the cell is already reused for another Load or not. Just FYI.