Current Location in Google Maps with swift - ios

Question

I'm trying to display the user's current location on a google map but in the case below, the map doesn't even get displayed. What should I change to fix this?
var locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
//user location stuff
locationManager.delegate = self
locationManager.requestWhenInUseAuthorization()
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.startUpdatingLocation()
}
func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
print("Error" + error.description)
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let userLocation = locations.last
let center = CLLocationCoordinate2D(latitude: userLocation!.coordinate.latitude, longitude: userLocation!.coordinate.longitude)
let camera = GMSCameraPosition.cameraWithLatitude(userLocation!.coordinate.latitude,
longitude: userLocation!.coordinate.longitude, zoom: 8)
let mapView = GMSMapView.mapWithFrame(CGRectZero, camera: camera)
mapView.myLocationEnabled = true
self.view = mapView
let marker = GMSMarker()
marker.position = center
marker.title = "Current Location"
marker.snippet = "XXX"
marker.map = mapView
locationManager.stopUpdatingLocation()
}

Answer 1

You can try this bellow code its working fine
import UIKit
import GoogleMaps
import GooglePlaces
class SearchMapsViewController: UIViewController,
UINavigationBarDelegate, GMSAutocompleteFetcherDelegate,
LocateOnTheMap, UISearchBarDelegate, CLLocationManagerDelegate
{
#IBOutlet var googleMapsContainerView: UIView!
var searchResultController: SearchResultsController!
var resultsArray = [String]()
var googleMapsView:GMSMapView!
var gmsFetcher: GMSAutocompleteFetcher!
var locationManager = CLLocationManager()
override func viewDidAppear(animated: Bool) {
locationManager.delegate = self
locationManager.requestWhenInUseAuthorization()
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.startUpdatingLocation()
self.googleMapsView = GMSMapView (frame: self.googleMapsContainerView.frame)
self.googleMapsView.settings.compassButton = true
self.googleMapsView.myLocationEnabled = true
self.googleMapsView.settings.myLocationButton = true
self.view.addSubview(self.googleMapsView)
searchResultController = SearchResultsController()
searchResultController.delegate = self
gmsFetcher = GMSAutocompleteFetcher()
gmsFetcher.delegate = self
}
func locationManager(manager: CLLocationManager, didFailWithError error: NSError)
{
print("Error" + error.description)
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation])
{
let userLocation = locations.last
let center = CLLocationCoordinate2D(latitude: userLocation!.coordinate.latitude, longitude: userLocation!.coordinate.longitude)
let camera = GMSCameraPosition.cameraWithLatitude(userLocation!.coordinate.latitude, longitude: userLocation!.coordinate.longitude, zoom: 15);
self.googleMapsView.camera = camera
self.googleMapsView.myLocationEnabled = true
let marker = GMSMarker(position: center)
print("Latitude :- \(userLocation!.coordinate.latitude)")
print("Longitude :-\(userLocation!.coordinate.longitude)")
marker.map = self.googleMapsView
marker.title = "Current Location"
locationManager.stopUpdatingLocation()
}

Answer 2

do requier setting on infoPlist and then try this
#IBOutlet weak var your "name of view which show map": GMSMapView!
override func viewDidLoad(){
super.viewDidLoad()
placesClient = GMSPlacesClient.shared()
locationManager.requestAlwaysAuthorization()
if CLLocationManager.locationServicesEnabled(){
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyKilometer
locationManager.distanceFilter = 500
locationManager.requestWhenInUseAuthorization()
locationManager.requestAlwaysAuthorization()
locationManager.startUpdatingLocation()
}
mapView.settings.myLocationButton = true
mapView.settings.zoomGestures = true
mapView.animate(toViewingAngle: 45)
mapView.delegate = self }
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let newLocation = locations.last // find your device location
mapView.camera = GMSCameraPosition.camera(withTarget: newLocation!.coordinate, zoom: 14.0) // show your device location on map
mapView.settings.myLocationButton = true // show current location button
var lat = (newLocation?.coordinate.latitude)! // get current location latitude
var long = (newLocation?.coordinate.longitude)! //get current location longitude
}

Answer 3

The problem is that you are setting the mapView's frame to CGRectZero. This causes the map to have zero height and zero width, no wonder it does not show!
Try setting it to CGRectMake(0,0,200,200) for example, this will give you a map at the left top of the screen with a size of 200 x 200.
I have never used Swift before, so the syntax might be a little different for CGRectMake()

Answer 4

It seems that your creation of the map isn't in your viewDidLoad function. You may want to try moving that there and see what happens.

Answer 5

Add the appropriate properties into the info.plist.
You should put make sure you have the NS properties of locationalwaysusagedescription and wheninuseusagedescription in the information properties list. This allows for the permissions of the current location to be asked.

Answer 6

import UIKit
import GoogleMaps
import GooglePlaces
import CoreLocation
class MapsViewController: UIViewController, CLLocationManagerDelegate, GMSMapViewDelegate {
var mapView = GMSMapView()
var locationManager = CLLocationManager()
let marker = GMSMarker()
override func viewDidLoad(){
super.viewDidLoad()
mapView.frame = self.view.bounds
self.view.addSubview(mapView)
locationManager.requestAlwaysAuthorization()
if CLLocationManager.locationServicesEnabled(){
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.distanceFilter = 10
locationManager.requestWhenInUseAuthorization()
locationManager.requestAlwaysAuthorization()
locationManager.startUpdatingLocation()
}
mapView.settings.myLocationButton = true
mapView.settings.zoomGestures = true
mapView.animate(toViewingAngle: 45)
mapView.delegate = self
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let newLocation = locations.last // find your device location
mapView.camera = GMSCameraPosition.camera(withTarget: newLocation!.coordinate, zoom: 14.0) // show your device location on map
mapView.settings.myLocationButton = true // show current location button
let lat = (newLocation?.coordinate.latitude)! // get current location latitude
let long = (newLocation?.coordinate.longitude)! //get current location longitude
marker.position = CLLocationCoordinate2DMake(lat,long)
marker.map = mapView
print("Current Lat Long - " ,lat, long )
}
func mapView(_ mapView: GMSMapView, didTapAt coordinate: CLLocationCoordinate2D) {
mapView.clear()
DispatchQueue.main.async {
let position = CLLocationCoordinate2D(latitude: coordinate.latitude, longitude: coordinate.longitude)
self.marker.position = position
self.marker.map = mapView
self.marker.icon = UIImage(named: "default_marker")
print("New Marker Lat Long - ",coordinate.latitude, coordinate.longitude)
}
}
}