swift 4 Parse JSON without keys with Alamofire - json

Question

Guys i want to get all names from JSON (screenshot below) and put them to tableView. The problem is...i got dictionary with this code. Now, how i can get each name value and put them on tableView.
func getDataFromApi(){
Alamofire.request("https://api.coinmarketcap.com/v2/listings/").responseJSON{ response in
if let locationJSON = response.result.value{
let locationObject: Dictionary = locationJSON as! Dictionary<String, Any>
for (key, value) in locationObject {
print("id:\(key), value:\(value)")
}
}
}
}

Answer 1

I would suggest convert the dictionaries response to a Currency object:
class Currency: NSObject {
var id: Int!
var name: String!
var symbol: String!
var websiteSlug: String!
init(id: Int, name: String, symbol: String, websiteSlug: String) {
super.init()
self.id = id
self.name = name
self.symbol = symbol
self.websiteSlug = websiteSlug
}
}
Then under the variables' section define the currencies array:
var currencies = [Currency]()
Finaly change the getDataFromApi implementation to this:
func getDataFromApi() {
Alamofire.request("https://api.coinmarketcap.com/v2/listings/").responseJSON{ response in
if let locationJSON = response.result.value as? [String: Any] {
let data = locationJSON["data"] as! [[String: Any]]
for dataItem in data {
let currency = Currency(id: dataItem["id"] as! Int,
name: dataItem["name"] as! String,
symbol: dataItem["symbol"] as! String,
websiteSlug: dataItem["website_slug"] as! String)
self.currencies.append(currency)
}
print(self.currencies)
}
}
}
I always suggest model the responses to objects because it allows you to do a better managing of the data you need to display on screen and keep your code structure organised.
Now you can easily show the data in a UITableView object from the currencies array.

Answer 2

I would suggest convert the Array In dictionaries response un a Currency object:
var dataArray = NSArray()
#IBOutlet var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a
nib.
self.getDataFromApi()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func getDataFromApi(){
Alamofire.request("https://api.coinmarketcap.com/v2/listings/").responseJSON{ response in
if let locationJSON = response.result.value{
let locationObject: Dictionary = locationJSON as! Dictionary<String, Any>
self.dataArray = locationObject["data"]as! NSArray
self.tableView.reloadData()
// for (key, value) in locationObject {
// print("id:\(key), value:\(value)")
// }
}
}
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return dataArray.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier:"cell") as! UITableViewCell
cell.textLabel?.text = (dataArray.object(at:indexPath.row) as! NSDictionary).value(forKey:"name") as! String
cell.detailTextLabel?.text = (dataArray.object(at:indexPath.row) as! NSDictionary).value(forKey:"symbol") as! String
return cell
}

Answer 3

var nameArray = [String]()
override func viewDidLoad() {
super.viewDidLoad()
getData()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return nameArray.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! tableCell
cell.nameLabel.text = nameArray[indexPath.row]
return cell
}
func alamofire() {
Alamofire.request("https://api.coinmarketcap.com/v2/listings/", method: .get, parameters: nil, encoding: URLEncoding.default, headers: nil).responseJSON { (response:DataResponse<Any>) in
switch(response.result) {
case .success(_):
guard let json = response.result.value as! [String:Any] else{ return}
guard let data = ["data"] as! [[String: Any]] else { return}
for item in data {
if let name = item["name"] as? String {
self.nameArray.append(name)
}
DispatchQueue.main.async {
self.tableView.reloadData()
}
}
break
case .failure(_):
print(response.result.error as Any)
break
}
}
}