Draw polyline using Google Maps in custom view with Swift 3

Question

I am trying to draw route between two places using Google Maps on a custom UIView but not able to get it correctly implemented. My custom view is mapViewX. I've installed google sdk using pods which includes pod 'GoogleMaps' and pod 'GooglePlaces'. I made custom-view Class as 'GMSMapView'. my code is :

    @IBOutlet weak var mapViewX: GMSMapView!

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

    let path = GMSMutablePath()
    path.add(CLLocationCoordinate2D(latitude: 37.778483, longitude: -122.513960))
    path.add(CLLocationCoordinate2D(latitude: 37.706753, longitude: -122.418677))
    let polyline = GMSPolyline(path: path)
    polyline.strokeColor = .black
    polyline.strokeWidth = 10.0
    polyline.map = mapViewX

}

Please help!

Answer 1

It works fine here. Make sure you're setting correct coordinates of GMSCameraPosition.

EDIT

To draw the route between two coordinate, use Google Maps Direction API

Something like :

    let origin = "\(37.778483),\(-122.513960)"
    let destination = "\(37.706753),\(-122.418677)"
    let url = "https://maps.googleapis.com/maps/api/directions/json?origin=\(origin)&destination=\(destination)&mode=driving&key=[YOUR-API-KEY]"

    Alamofire.request(url).responseJSON { response in
        let json = JSON(data: response.data!)
        let routes = json["routes"].arrayValue

        for route in routes
        {
            let routeOverviewPolyline = route["overview_polyline"].dictionary
            let points = routeOverviewPolyline?["points"]?.stringValue
            let path = GMSPath.init(fromEncodedPath: points!)

            let polyline = GMSPolyline(path: path)
            polyline.strokeColor = .black
            polyline.strokeWidth = 10.0
            polyline.map = mapViewX

        }
    }

For more info - Directions API Developer's Guide