google maps route between 2 points with multi waypoints swift ios - ios

Question

I have this code but for some reason it's just drawing a rout between 2 points (first, and last points) ignoring all other points which is [index == 1 to index == n-1 ]
output : route between only 2 markers
expected output : route between all markers (5 markers)
Is any body knows what is the wrong with my code ?
func getDotsToDrawRoute(positions : [CLLocationCoordinate2D], completion: #escaping(_ path : GMSPath) -> Void) {
if positions.count > 1 {
let origin = positions.first
let destination = positions.last
var wayPoints = ""
for point in positions {
wayPoints = wayPoints.characters.count == 0 ? "\(point.latitude),\(point.longitude)" : "\(wayPoints)|\(point.latitude),\(point.longitude)"
}
print("this is fullPath :: \(wayPoints)")
let request = "https://maps.googleapis.com/maps/api/directions/json"
let parameters : [String : String] = ["origin" : "\(origin!.latitude),\(origin!.longitude)", "destination" : "\(destination!.latitude),\(destination!.longitude)", "wayPoints" : wayPoints, "stopover": "true", "key" : kyes.google_map]
Alamofire.request(request, method:.get, parameters : parameters).responseJSON(completionHandler: { response in
guard let dictionary = response.result.value as? [String : AnyObject]
else {
return
}
print ("route iss ::: \(dictionary["routes"])")
if let routes = dictionary["routes"] as? [[String : AnyObject]] {
if routes.count > 0 {
var first = routes.first
if let legs = first!["legs"] as? [[String : AnyObject]] {
let fullPath : GMSMutablePath = GMSMutablePath()
for leg in legs {
if let steps = leg["steps"] as? [[String : AnyObject]] {
for step in steps {
if let polyline = step["polyline"] as? [String : AnyObject] {
if let points = polyline["points"] as? String {
fullPath.appendPath(path: GMSMutablePath(fromEncodedPath: points))
}
}
}
let polyline = GMSPolyline.init(path: fullPath)
polyline.path = fullPath
polyline.strokeWidth = 4.0
polyline.map = self._map }
}
}
}
}
})
}
}

Answer 1

Check out this solution working fine with me
func drawpath(positions: [CLLocationCoordinate2D]) {
let origin = positions.first!
let destination = positions.last!
var wayPoints = ""
for point in positions {
wayPoints = wayPoints.characters.count == 0 ? "\(point.latitude),\(point.longitude)" : "\(wayPoints)%7C\(point.latitude),\(point.longitude)"
}
let url = "https://maps.googleapis.com/maps/api/directions/json?origin=\(origin!.latitude),\(origin!.longitude)&destination=\(destination.latitude),\(destination.longitude)&mode=driving&waypoints=\(wayPoints)&key=KEY"
Alamofire.request(url).responseJSON { response in
print(response.request as Any) // original URL request
print(response.response as Any) // HTTP URL response
print(response.data as Any) // server data
print(response.result as Any) // result of response serialization
let json = try! JSON(data: response.data!)
let routes = json["routes"][0]["overview_polyline"]["points"].stringValue
let path = GMSPath.init(fromEncodedPath: routes)
let polyline = GMSPolyline.init(path: path)
polyline.strokeWidth = 4
polyline.strokeColor = UIColor.red
polyline.map = self._map
}
}

Answer 2

try with:
func getPolylineRoute(from source: CLLocationCoordinate2D, to destination: CLLocationCoordinate2D){
self.mapView.clear()
let config = URLSessionConfiguration.default
let session = URLSession(configuration: config)
let url = URL(string: "https://maps.googleapis.com/maps/api/directions/json?origin=\(source.latitude),\(source.longitude)&destination=\(destination.latitude),\(destination.longitude)&sensor=true&mode=driving&key=YOUR_API_KEY")!
let task = session.dataTask(with: url, completionHandler: {
(data, response, error) in
if error != nil {
print("Error" + error!.localizedDescription)
}else {
do {
if let json : [String:Any] = try JSONSerialization.jsonObject(with: data!, options: .allowFragments) as? [String: Any]{
guard let routes = json["routes"] as? NSArray else {
return
}
print(routes)
if (routes.count > 0) {
let overview_polyline = routes[0] as? NSDictionary
let dictPolyline = overview_polyline?["overview_polyline"] as? NSDictionary
let points = dictPolyline?.object(forKey: "points") as? String
self.showPath(polyStr: points!)
let distancia = overview_polyline?["legs"] as? NSArray
let prueba = distancia![0] as? NSDictionary
let distancia2 = prueba?["distance"] as? NSDictionary
let control = distancia2?.object(forKey: "text") as! String
DispatchQueue.main.async {
let bounds = GMSCoordinateBounds(coordinate: source, coordinate: destination)
let update = GMSCameraUpdate.fit(bounds, with: UIEdgeInsetsMake(170, 30, 30, 30))
self.mapView!.moveCamera(update)
}
}
}
}
catch {
print("error in JSONSerialization")
}
}
})
task.resume()
}
You call the method with
self.getPolylineRoute(from: origin, to: destination)
Remember in the google url to put your api key where it says YOUR_API_KEY

Answer 3

You can use this function for drawing the polyline which covers your waypoints.
Make sure that positions doesn't have same waypoint coordinates. If
so, it will just draw the polylines from source to destination
func drawPolyLine(for positions: [CLLocationCoordinate2D]) {
let origin = positions.first!
let destination = positions.last!
var wayPoints = ""
for point in positions {
wayPoints = wayPoints.count == 0 ? "\(point.latitude),\(point.longitude)" : "\(wayPoints)%7C\(point.latitude),\(point.longitude)"
}
let url = "https://maps.googleapis.com/maps/api/directions/json?origin=\(origin.latitude),\(origin.longitude)&destination=\(destination.latitude),\(destination.longitude)&mode=driving&waypoints=\(wayPoints)&key=\(YOUR_GOOLE_MAP_API_KEY)"
Alamofire.request(url).responseJSON { response in
do {
let json = try JSONSerialization.jsonObject(with: response.data!, options: .allowFragments) as? [String: Any]
guard let routes = json?["routes"] as? NSArray else {
return
}
for route in routes {
let routeOverviewPolyline: NSDictionary = ((route as? NSDictionary)!.value(forKey: "overview_polyline") as? NSDictionary)!
let points = routeOverviewPolyline.object(forKey: "points")
let path = GMSPath.init(fromEncodedPath: (points! as? String)!)
let polyline = GMSPolyline.init(path: path)
polyline.strokeWidth = 4
polyline.strokeColor = UIColor(red: 95/255.0, green: 233/255.0, blue: 188/255.0, alpha: 1.0)
polyline.map = self.mapView
}
} catch {
print("Unexpected Error")
}
}
}