unable to load JSON data in 'data' array - swift

Question

when I call this function the array 'data' is showing empty square brackets, it is not giving me any errors though
here is the code :-
import Foundation
import Alamofire
import SwiftyJSON
class Networking {
var data = [Item]()
let tVC = TableViewController()
let url = "https://api.coinmarketcap.com/v1/ticker/"
func getCoinData(url: String) {
Alamofire.request(url, method: .get)
.responseJSON { response in
if response.result.isSuccess {
let coinJSON : JSON = JSON(response.result.value!)
for i in 0..<coinJSON.count{
let coinName = Item(bitJSON: coinJSON[i])
self.data.append(coinName)
self.tVC.tableView.reloadData()
}
}
else {
print("Error: \(String(describing: response.result.error))")
}
}
}
}

Answer 1

Try this one.
Change your url, method is "Get" and your mapping model.
public static func getArrayInformation(completionHandler: #escaping (APIResponse) -> Void) {
let url = "your url"
let params: Parameters = ["username": "admin",
"password": "1234"]
Alamofire.request(url,
method: .post,
parameters: params,
encoding: JSONEncoding.default,
headers: ["Content-Type": "application/json"])
.responseDecodableObject(keyPath: nil, decoder: JSONDecoder(), completionHandler: { (handler: DataResponse<[Your Object Array]>) in
completionHandler(handler.result.value ?? [Your Object Array]())
})
}

Answer 2

why you reload Table every loop iteration , and instead Loop use Map
class Networking {
var data = [Item]()
let tVC = TableViewController()
let url = "https://api.coinmarketcap.com/v1/ticker/"
func getCoinData(url: String) {
Alamofire.request(url, method: .get)
.responseJSON { response in
if response.result.isSuccess {
let coinJSON : JSON = JSON(response.result.value!)
data = coinJSON.map({ (coinJson) -> Item in
return Item(bitJSON: coinJson)
})
DispatchQueue.main.async {
self.tVC.tableView.reloadData()
}
}
else {
print("Error: \(String(describing: response.result.error))")
}
}
}
}