SWIFT: google maps draw waypoint polyline

Question

Hi I wonder if there is a method to draw a waypoint between two or more markers in google maps iOS. I don\'t want to draw straight lines... but use just public roads. Here i

Answer 1

To draw polyline between two markers on GoogleMap in Swift 3.

// Pass your source and destination coordinates in this method.
func getPolylineRoute(from source: CLLocationCoordinate2D, to destination: CLLocationCoordinate2D){

        let config = URLSessionConfiguration.default
        let session = URLSession(configuration: config)

        let url = URL(string: "http://maps.googleapis.com/maps/api/directions/json?origin=\(source.latitude),\(source.longitude)&destination=\(destination.latitude),\(destination.longitude)&sensor=false&mode=driving")!

        let task = session.dataTask(with: url, completionHandler: {
            (data, response, error) in
            if error != nil {
                print(error!.localizedDescription)
            }else{
                do {
                    if let json : [String:Any] = try JSONSerialization.jsonObject(with: data!, options: .allowFragments) as? [String: Any]{

                        let routes = json["routes"] as? [Any]
                        let overview_polyline = routes?[0] as?[String:Any]
                        let polyString = overview_polyline?["points"] as?String

                        //Call this method to draw path on map
                        self.showPath(polyStr: polyString!)
                    }

                }catch{
                    print("error in JSONSerialization")
                }
            }
        })
        task.resume()
    }

To draw polyline on map .

func showPath(polyStr :String){
    let path = GMSPath(fromEncodedPath: polyStr)
    let polyline = GMSPolyline(path: path)
    polyline.strokeWidth = 3.0
    polyline.map = mapView // Your map view
}