How can I keep the value of a variable outside a function? - json

Question

I'm trying to display the value I get from a JSON in an AR text, within the DecodeJSON function it all works, I even achieve to put that value in a normal label but when I try to set that value to the AR text it is empty... what can I do or what I'm doing wrong? It would be very useful if you can help me out with this.
#IBOutlet var sceneView: ARSCNView!
#IBOutlet weak var labelTest: UILabel!
let URL_VWC = "http://w1.doomdns.com:11000/restaguapotable/api/celula/10/sitio/4";
var name :String!
struct JSONTest: Codable {
let Nombre: String
let Tiempo: String
}
override func viewDidLoad() {
super.viewDidLoad()
// Set the view's delegate
sceneView.delegate = self
// Show statistics such as fps and timing information
sceneView.showsStatistics = true
// Create a new scene
let scene = SCNScene()
// Set the scene to the view
sceneView.scene = scene
DecodeJson();
let text = SCNText(string: name, extrusionDepth: 1.0)
text.firstMaterial?.diffuse.contents = UIColor.black
let textNode = SCNNode(geometry: text)
textNode.position = SCNVector3(0,0, -0.5)
textNode.scale = SCNVector3(0.02,0.02,0.02)
sceneView.scene.rootNode.addChildNode(textNode)
}
func DecodeJson(){
guard let url = URL(string: URL_VWC) else { return }
// 2
URLSession.shared.dataTask(with: url) { (data, response, error) in
if error != nil {
print(error!.localizedDescription)
}
guard let data = data else { return }
do {
// 3
//Decode data
let JSONData = try JSONDecoder().decode(JSONTest.self, from: data)
// 4
//Get back to the main queue
DispatchQueue.main.async {
self.name = JSONData.Nombre
self.labelTest.text = self.name
}
} catch let jsonError {
print(jsonError)
}
// 5
}.resume()
}

Answer 1

This means that DecodeJson() returns self.name = JSONData.Nombre after let text = SCNText(string: name, extrusionDepth: 1.0) is called.
You should have a separate function where you setup your scene after the DecodeJson() has returned the JSON