Add live data

import Mapbox
 
class LiveDataExample: UIViewController, MGLMapViewDelegate {
 
var source: MGLShapeSource!
var timer = Timer()
override func viewDidLoad() {
super.viewDidLoad()
 
// Create a new map view using the Mapbox Dark style.
let mapView = MGLMapView(frame: view.bounds,
styleURL: MGLStyle.darkStyleURL(withVersion: 9))
mapView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
mapView.tintColor = .gray
 
// Set the map view‘s delegate property.
mapView.delegate = self
view.addSubview(mapView)
}
 
func mapView(_ mapView: MGLMapView, didFinishLoading style: MGLStyle) {
if let url = URL(string: "https://wanderdrone.appspot.com/") {
// Add a source to the map. https://wanderdrone.appspot.com/ generates coordinates for simulated paths.
source = MGLShapeSource(identifier: "wanderdrone", url: url, options: nil)
style.addSource(source)
 
// Add a Maki icon to the map to represent the drone's coordinate. The specified icon is included in the Mapbox Dark style's sprite sheet. For more information about Maki icons, see https://www.mapbox.com/maki-icons/
let droneLayer = MGLSymbolStyleLayer(identifier: "wanderdrone", source: source)
droneLayer.iconImageName = NSExpression(forConstantValue: "rocket-15")
droneLayer.iconHaloColor = NSExpression(forConstantValue: UIColor.white)
style.addLayer(droneLayer)
 
// Create a timer that calls the `updateUrl` function every 1.5 seconds.
timer.invalidate()
timer = Timer.scheduledTimer(timeInterval: 1.5, target: self, selector: #selector(updateUrl), userInfo: nil, repeats: true)
}
}
 
@objc func updateUrl() {
// Update the icon's position by setting the `url` property on the source.
source.url = source.url
}
 
override func viewWillDisappear(_ animated: Bool) {
// Invalidate the timer if the view will disappear.
timer.invalidate()
timer = Timer()
}
}