How to loop through JSON object and view it as string - Swift - ios

Question

I just started coding in swift and I am at the point that I can get a single value out of the JSON but I can't seem to get all the values out of it by looping trough the array.
so my question is how do I get all the values out and view it as float or string.
here is my code:
let url = URL(string: "http://api.fixer.io/latest")
let task = URLSession.shared.dataTask(with: url!) { (data, response, error) in
if error != nil
{
print ("ERROR")
}
else
{
if let content = data
{
do
{
//Array
let myJson = try JSONSerialization.jsonObject(with: content, options: JSONSerialization.ReadingOptions.mutableContainers) as AnyObject
//print(myJson)
for items in myJson [AnyObject] {
print(items)
}
//here is the single value part, it looks for the rates then it puts it in label.
if let rates = myJson["rates"] as? NSDictionary{
if let currency = rates["AUD"]{
print(currency);
self.label.text=String(describing: currency)
}
}
}
catch
{
}
}
}
}
task.resume()

Answer 1

Try this code:
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
self.getJson()
}
func getJson(){
let url = URL(string: "http://api.fixer.io/latest")
let task = URLSession.shared.dataTask(with: url!) { (data, response, error) in
if error != nil
{
print ("ERROR")
}
else
{
if let content = data
{
do
{
//Dic
guard let myJson:[String:Any] = try JSONSerialization.jsonObject(with: content, options: JSONSerialization.ReadingOptions.mutableContainers) as? [String:Any] else {return}
//print(myJson)
for items in myJson {
print(items)
}
//here is the single value part, it looks for the rates then it puts it in label.
if let rates = myJson["rates"] as? NSDictionary{
if let currency = rates["AUD"]{
print(currency);
// self.label.text=String(describing: currency)
}
}
}
catch
{
}
}
}
}
task.resume()
}
}
And the result in the console is like below:
The myJson is the dictionary what you want.

Answer 2

I strongly recommend that you use SwiftyJSON to deal with JSON. It's extremely easy to learn and use.
first, you should install SwiftyJSON via CocoaPods (or any other way you like). then you can code it simply like below:
let url = URL(string: "http://api.fixer.io/latest")
let task = URLSession.shared.dataTask(with: url!) { (data, response, error) in
if error != nil
{
print ("ERROR")
}
else
{
if let content = data
{
// Initialization
let myJson = JSON(data: content)
// Getting a string using a path to the element
self.label.text = myJson["rates"]["AUD"].stringValue
// Loop test
for (key,value):(String, JSON) in myJson["rates"] {
print("key is :\(key), Value:\(value.floatValue)")
}
}
}
}
task.resume()

Answer 3

try this out:
if let currency = rates["AUD"] as? NSDictionary{
for(key,value) in currency {
// the key will be your currency format and value would be your currency value
}
}