Google Maps iOS SDK, Getting Directions between 2 locations

Question

While I am using Google Maps SDK, I am trying to get driving direction between two locations on iOS. I know we can do this using two methods:-

1.) Using URL Scheme,

Answer 1

Swift 3.0 & XCode 8.0 Using AFNetworking & SwiftJson

        let destLatitude="26.9124"
        let destLongitude="75.7873"
        mapView.isMyLocationEnabled = true
        var urlString = "\("https://maps.googleapis.com/maps/api/directions/json")?origin=\("28.7041"),\("77.1025")&destination=\(destLatitude),\(destLongitude)&sensor=true&key=\("Your-Api-key")"

        urlString = urlString.addingPercentEncoding( withAllowedCharacters: .urlQueryAllowed)!

        let manager=AFHTTPRequestOperationManager()

        manager.responseSerializer = AFJSONResponseSerializer(readingOptions: JSONSerialization.ReadingOptions.allowFragments) as AFJSONResponseSerializer

        manager.requestSerializer = AFJSONRequestSerializer() as AFJSONRequestSerializer

        manager.responseSerializer.acceptableContentTypes = NSSet(objects:"application/json", "text/html", "text/plain", "text/json", "text/javascript", "audio/wav") as Set


        manager.post(urlString, parameters: nil, constructingBodyWith: { (formdata:AFMultipartFormData!) -> Void in

            }, success: {  operation, response -> Void in
                //{"responseString" : "Success","result" : {"userId" : "4"},"errorCode" : 1}
                //if(response != nil){
                let parsedData = JSON(response)
                print_debug("parsedData : \(parsedData)")
               var path = GMSPath.init(fromEncodedPath: parsedData["routes"][0]["overview_polyline"]["points"].string!)
                 //GMSPath.fromEncodedPath(parsedData["routes"][0]["overview_polyline"]["points"].string!)
                var singleLine = GMSPolyline.init(path: path)
                singleLine.strokeWidth = 7
                singleLine.strokeColor = UIColor.green
                singleLine.map = self.mapView
                //let loginResponeObj=LoginRespone.init(fromJson: parsedData)


                //  }
            }, failure: {  operation, error -> Void in

                print_debug(error)
                let errorDict = NSMutableDictionary()
                errorDict.setObject(ErrorCodes.errorCodeFailed.rawValue, forKey: ServiceKeys.keyErrorCode.rawValue as NSCopying)
                errorDict.setObject(ErrorMessages.errorTryAgain.rawValue, forKey: ServiceKeys.keyErrorMessage.rawValue as NSCopying)

        })