Parse the json value and get ID into var in Swift - json

Question

I have list of company names with IDs. I have used a drop down and showing company name in it by parsing JSON data. uncertainly I am unable to get the ID of the selected item in the drop down menu.
My json data is
{
"success": true,
"message": [
{
"company_name": "ABC",
"id": 1
},
{
"company_name": "JHG",
"id": 10
}
]}
My swift code:
let url = NSURL(string: COMPANY_URL)
URLSession.shared.dataTask(with: (url as?URL)!, completionHandler: {(data,response,error) ->
Void in
if let jsonObj = try? JSONSerialization.jsonObject(with: data!, options: .allowFragments) as? NSDictionary
{
// print(jsonObj.value(forKey: "message")!)
if let messageArray = jsonObj.value(forKey: "message") as? NSArray
{
for message in messageArray
{
if let messageDict = message as? NSDictionary
{
if let data = data {
let successmessage = jsonObj.value(forKey: "success") as? Int
if(successmessage == 1)
{
if let company_name = messageDict.value(forKey: "company_name")
{
self.companiesArray.append(company_name as! String)
}
if let company_id = messageDict.value(forKey: "id")
{
self.companyidstr.append(company_id as! Int)
print(self.companyidstr)
}
for messageArray in self.companyidstr
{
print(messageArray)
let btnlabel = Int(self.companyBtn.titleLabel!.text!)
if(btnlabel == Int(messageArray))
{
self.companyidstring = messageArray
print(self.companyidstring)
// THIS IS WHERE IT NEED TO SHOW ID BUT NOT }
}
OperationQueue.main.addOperation({
self.tableView.reloadData()
})
} else
{
}
}
}
}
}
}
}).resume()
My requirement is to show list of company name's to users but when they select any company name,should save in the form of concerned ID of the selected item.
my ENTIRE CODE:
class RegistrationViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
#IBOutlet weak var tableView: UITableView!
#IBOutlet weak var companyBtn: UIButton!
final let COMPANY_URL = COMPANY_URL
var companiesArray = [String]()
var companyidstr = [Int]()
var companyidstring: Int = 0
override func viewDidLoad() {
super.viewDidLoad()
downloadCompanyNamesFromDB()
// insertUserDetailsintoDB()
tableView.isHidden = true
self.downloadCompanyNamesFromDB()
//tableView.tableFooterView = UIView()
tableView.dataSource = self
tableView.delegate = self
}
#IBAction func companyBtnClick(_ sender: Any) {
// tableView.isHidden = false
if(tableView.isHidden)
{
animate(toogle: true)
} else
{
animate(toogle: false)
}
}
func animate(toogle: Bool)
{
if(toogle)
{
UIView.animate(withDuration: 0.3)
{
self.tableView.isHidden = false
}
} else{
UIView.animate(withDuration: 0.3)
{
self.tableView.isHidden = true
}
}
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return companiesArray.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
cell.textLabel?.text = companiesArray[indexPath.row]
print(companiesArray)
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let companytitle = companiesArray[indexPath.row]
companyBtn.setTitle(companytitle, for: .normal)
print(companytitle)
// print(companiesArray[indexPath.row].id as! String)
// companiesArray = message --> HERE IS THE CODE
animate(toogle: false)
}
func downloadCompanyNamesFromDB()
{
let url = NSURL(string: COMPANY_URL)
URLSession.shared.dataTask(with: (url as?URL)!, completionHandler: {(data,response,error) ->
Void in
if let jsonObj = try? JSONSerialization.jsonObject(with: data!, options: .allowFragments) as? NSDictionary
{
// print(jsonObj.value(forKey: "message")!)
if let messageArray = jsonObj.value(forKey: "message") as? NSArray
{
for message in messageArray
{
if let messageDict = message as? NSDictionary
{
if let data = data {
let successmessage = jsonObj.value(forKey: "success") as? Int
if(successmessage == 1)
{
} else
{
}
}
}
}
}
}
}).resume()
}
}
}

Answer 1

It's better to
let dec = JSONDecoder()
dec.keyDecodingStrategy = .convertFromSnakeCase
let res = try! dec.decode(Root.self,from:data)
print(res.message)
// MARK: - Empty
struct Root: Codable {
let success: Bool
let message: [Message]
}
// MARK: - Message
struct Message: Codable {
let companyName: String
let id: Int
}
var companiesArray = [Message]()
let url = URL(string: COMPANY_URL)!
URLSession.shared.dataTask(with:url, completionHandler: {(data,response,error) ->
Void in
guard let data = data else { return }
let dec = JSONDecoder()
dec.keyDecodingStrategy = .convertFromSnakeCase
let res = try! dec.decode(Root.self,from:data)
companiesArray = res.message
print(res.message)
OperationQueue.main.addOperation({
self.tableView.reloadData()
})
}).resume()