Google Maps Route For Swift

GoogleMapsRouteForSwift.swift

//MARK:- Draw Route Betweeen two points
/**
 To draw a route between to cordinates.

 - origin:				Source marker cordinate
 - destination:			destination marker cordinate
 - self.googleMapsKey:	API Key
 */

let origin = "-23.543293,-46.638592"
let destination = "-23.642446,-46.637669"

let urlString = "https://maps.googleapis.com/maps/api/directions/json?origin=\(origin)&destination=\(destination)&mode=driving&key=\(self.googleMapsKey)"

Webservice.get(urlString, headers: [:]) {
  response in

  if let data = response {
    let json = JSON(data)

    do{
      let routes = json["routes"].array
      self.mapView?.clear()

      for route in routes!
      {
        let points = route.dictionary?["overview_polyline"]?.dictionaryObject?["points"]
        let path = GMSPath.init(fromEncodedPath: points! as! String)
        let polyline = GMSPolyline.init(path: path)
        polyline.strokeWidth = 3

        let bounds = GMSCoordinateBounds(path: path!)
        self.mapView!.animate(with: GMSCameraUpdate.fit(bounds, withPadding: 30.0))

        polyline.map = self.mapView

      }
    } catch let error as NSError{
      print("error:\(error)")
    }
  }
}