How to use a variable outside a class - swift

Question

I want to use variables (depAirportLat and depAirportLong) outside ViewController class in order to display coordinates on a map but it doesn't works, could you help me ? This is my program :
import UIKit
import MapKit
class ViewController: UIViewController, UITextFieldDelegate {
#IBOutlet weak var resultWeather: UIImageView!
#IBOutlet weak var arrairport: UITextField!
#IBOutlet weak var depairport: UITextField!
#IBOutlet weak var resultAirport: UILabel!
#IBOutlet weak var fontAirports: UIImageView!
#IBOutlet weak var resultTemp: UILabel!
#IBOutlet weak var resultTempfar: UILabel!
#IBOutlet weak var resultHum: UILabel!
#IBOutlet weak var resultCeiling: UILabel!
#IBOutlet weak var resultClouds: UILabel!
#IBOutlet weak var resultWind: UILabel!
#IBOutlet weak var resultPressure: UILabel!
#IBOutlet weak var resultMetar: UILabel!
#IBOutlet weak var resultTaf: UILabel!
#IBOutlet weak var arrMap: MKMapView!
#IBOutlet weak var depMap: MKMapView!
#IBAction func getWeather(_ sender: UIButton) {
sender.pulsate()
if let url = URL(string: "http://fr.allmetsat.com/metar-taf/france.php?icao=" + depairport.text!.replacingOccurrences(of: " ", with: "-"))
{ let request = NSMutableURLRequest(url: url)
let task = URLSession.shared.dataTask(with: request as URLRequest) { data, response, error in
var message = ""
if error != nil { print(error!) } else { if let unwrappedData = data {
let dataString = NSString(data: unwrappedData, encoding: String.Encoding.utf8.rawValue); var stringSeparator = "METAR:</b> "
if let contentArray = dataString?.components(separatedBy: stringSeparator) {
if contentArray.count > 1 { stringSeparator = "</p></div><div class=\"c1\""
let newContentArray = contentArray[1].components(separatedBy: stringSeparator); if newContentArray.count > 1 { message = newContentArray[0]
print(message)
if (dataString?.contains("CAVOK"))!{
DispatchQueue.main.async { self.resultWeather.image = UIImage(named: "sun.png") }}
else if (dataString?.contains("SKC"))!{
DispatchQueue.main.async { self.resultWeather.image = UIImage(named: "sun.png")}
}
else if (dataString?.contains("SCT"))!{
DispatchQueue.main.async { self.resultWeather.image = UIImage(named: "scattered.png")} }
else if (dataString?.contains("OVC"))!{
DispatchQueue.main.async { self.resultWeather.image = UIImage(named: "overcast.png")} }
else if (dataString?.contains("BKN"))!{
DispatchQueue.main.async { self.resultWeather.image = UIImage(named: "broken.png")} }
else if (dataString?.contains("FEW"))!{
DispatchQueue.main.async { self.resultWeather.image = UIImage(named: "few.png")} }
else if (dataString?.contains("NSC"))!{
DispatchQueue.main.async { self.resultWeather.image = UIImage(named: "sun.png")} }
else if (dataString?.contains("RAIN"))!{
DispatchQueue.main.async { self.resultWeather.image = UIImage(named: "rain.png")}
}}}}}}
}
task.resume();
if let url = URL(string: "http://fr.allmetsat.com/metar-taf/france.php?icao=" + self.depairport.text!.replacingOccurrences(of: " ", with: "-"))
{ let requesta = NSMutableURLRequest(url: url)
let taska = URLSession.shared.dataTask(with: requesta as URLRequest) { data, response, error in
var messagea = ""
if error != nil { print(error!) } else { if let unwrappedData = data {
let dataStringa = NSString(data: unwrappedData, encoding: String.Encoding.utf8.rawValue); var stringSeparatora = "<div class=\"c1b\""
if let contentArray = dataStringa?.components(separatedBy: stringSeparatora) { if contentArray.count > 1 { stringSeparatora = "</h1><p>"
let newContentArray = contentArray[1].components(separatedBy: stringSeparatora); if newContentArray.count > 1 { messagea = newContentArray[0]
print(messagea) }}}};
}
if messagea == "" { messagea = "No data..." }
DispatchQueue.main.sync(execute: { self.resultAirport.text = self.depairport.text! })}; taska.resume() } else { self.resultAirport.text = "0" };
//latitude variable (depAirportLat)
if let urlcoord = URL(string:"https://flyawaysimulation.com/airports/" + self.depairport.text!.replacingOccurrences(of: " ", with: "-"))
{ let requestad = NSMutableURLRequest(url: urlcoord)
let taskad = URLSession.shared.dataTask(with: requestad as URLRequest) { data, response, error in
var depAirportLat = ""
if error != nil { print(error!) } else { if let unwrappedData = data {
let dataStringad = NSString(data: unwrappedData, encoding: String.Encoding.utf8.rawValue); var stringSeparatorad = "<dt>Latitude</dt>"
if let contentArray = dataStringad?.components(separatedBy: stringSeparatorad) { if contentArray.count > 1 { stringSeparatorad = "</dd>"
let newContentArray = contentArray[1].components(separatedBy: stringSeparatorad); if newContentArray.count > 1 { depAirportLat = newContentArray[0]
print(depAirportLat) }}}}}};
taskad.resume()
}
}
override func viewDidLoad() {
super.viewDidLoad()
//Do any additional setup after loading the view, typically from a nib.
class gloVarDep {
var depAirportLatReal = depAirportLat.dropFirst(5)
var depAirportLatRealCoord = String(depAirportLatReal)
var depAirportLatRealCoordFloat = (depAirportLatRealCoord as NSString).floatValue

Answer 1

If you want to be able to use those variables outside the class, then you have to declare them as global variables. Just declare them outside of the class scope and you should be fine.
Alternatively, you could create a structure and define static variables that can be used everywhere. The aforementioned makes things a bit more readable and retainable.