Redraw direction paths in didUpdateLocations - ios

Question

I want to redraw my direction path and move my marker to the current location. I am currently doing this inside didUpdateLocations function but it gets glitchy because it draws multiple markers and path at the same time.
Here is my code:
let location = locations.last
let destination = CLLocation(latitude: order!.user_coord![0], longitude: order!.user_coord![1])
let origin = CLLocation(latitude: (location?.coordinate.latitude)!, longitude: (location?.coordinate.longitude)!)
self.drawPath(startLocation: origin, endLocation: destination)
self.createMarker(titleMarker: order!.store_name!, iconMarker: UIImage(named: "icons8-user_filled")!, latitude: order!.user_coord![0], longitude: order!.user_coord![1])
self.createMarker(titleMarker: "User", iconMarker: UIImage(named: "icons8-mountain_biking")!, latitude: (location?.coordinate.latitude)!, longitude: (location?.coordinate.longitude)!)
let camera = GMSCameraPosition.camera(withLatitude: (location?.coordinate.latitude)!, longitude: (location?.coordinate.longitude)!, zoom: 17.0)
self.map.animate(to: camera)
locationManager.stopUpdatingLocation()

Answer 1

Declare a variable
var drawFinished:Bool!
in viewDidLoad
drawFinished = false
in didUpdate
if(!drawFinished)
{
drawFinished = true
let location = locations.last
let destination = CLLocation(latitude: order!.user_coord![0], longitude: order!.user_coord![1])
let origin = CLLocation(latitude: (location?.coordinate.latitude)!, longitude: (location?.coordinate.longitude)!)
self.drawPath(startLocation: origin, endLocation: destination)
self.createMarker(titleMarker: order!.store_name!, iconMarker: UIImage(named: "icons8-user_filled")!, latitude: order!.user_coord![0], longitude: order!.user_coord![1])
self.createMarker(titleMarker: "User", iconMarker: UIImage(named: "icons8-mountain_biking")!, latitude: (location?.coordinate.latitude)!, longitude: (location?.coordinate.longitude)!)
let camera = GMSCameraPosition.camera(withLatitude: (location?.coordinate.latitude)!, longitude: (location?.coordinate.longitude)!, zoom: 17.0)
self.map.animate(to: camera)
locationManager.stopUpdatingLocation()
}
when you want to update set
drawFinished = false
and clear paths and annotations like this
func clearMapOverlays()
{
for dl in self.myMapView.overlays
{
if(dl is GMSPolyline )
{
self.myMapView.remove(dl)
}
}
self.myMapView.setNeedsDisplay()
for name in self.myMapView.annotations
{
self.myMapView.removeAnnotation(anno)
}
}