So I am trying to do 3 things.
Have a map which shows my location.
Map should be slightly slanted to give a 3d feel; same like when we scroll up and down with 2 fingers on apple map.
Use compass to rotate the map.
I have enabled userTrackingMode on the map and the map rotates with compass but if I set a MKMapCamera on the map the compass won't work.
Here is my code.
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.delegate = self
locationManager.requestWhenInUseAuthorization()
mapView.setUserTrackingMode(.FollowWithHeading, animated: true)
locationManager.startUpdatingLocation()
}
func locationManager(manager: CLLocationManager, didUpdateToLocation newLocation: CLLocation, fromLocation oldLocation: CLLocation) {
let userCordinate = CLLocationCoordinate2D(latitude: newLocation.coordinate.latitude, longitude: newLocation.coordinate.longitude)
let eyeCordinate = CLLocationCoordinate2D(latitude: newLocation.coordinate.latitude - 0.021078, longitude: newLocation.coordinate.longitude - 0.04078 )
let mapCamera = MKMapCamera(lookingAtCenterCoordinate: userCordinate, fromEyeCoordinate: eyeCordinate, eyeAltitude: 1400)
mapView.setCamera(mapCamera, animated: true)
print("Camera set")
}
What am I doing wrong here?
You have to update the heading of the camera with the compass. Here's something that I'm currently using:
func locationManager(_ manager: CLLocationManager, didUpdateHeading newHeading: CLHeading) {
self.mapView.camera.heading = newHeading.trueHeading
}
Related
I have tried removing my setRegion() but it still persists to not allow map panning. The build overrides finger gestures for exploring the mapview and responds very briefly before reverting back to original position. I am not sure the issue. I have rewritten my code to a new project and there is no issue, can anyone explain to me where I am going wrong?
import UIKit
import MapKit
import CoreLocation
class ViewController: UIViewController {
#IBOutlet weak var mapView: MKMapView!
let locationManager = CLLocationManager()
let regionInMeters: Double = 15000
override func viewDidLoad() {
super.viewDidLoad()
checkLocationServices()
}
func setupLocationManager(){
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
}
func centerUserLocation(){
if let location = locationManager.location?.coordinate{
let region = MKCoordinateRegion.init(center: location, latitudinalMeters: regionInMeters, longitudinalMeters: regionInMeters)
mapView.setRegion(region, animated: true)
}
}
func checkLocationServices(){
if CLLocationManager.locationServicesEnabled(){
setupLocationManager()
checkLocationAuthorization()
} else {
// alert user must turn on
}
}
func checkLocationAuthorization(){
switch CLLocationManager.authorizationStatus(){
case .authorizedWhenInUse:
mapView.showsUserLocation = true
centerUserLocation()
locationManager.startUpdatingLocation()
break
case .denied:
mapView.showsUserLocation = false
break
case .notDetermined:
locationManager.requestWhenInUseAuthorization()
break
case .restricted:
//supervisory controls enabled
mapView.showsUserLocation = false
break
case .authorizedAlways:
mapView.showsUserLocation = true
break
}
}
}
extension ViewController: CLLocationManagerDelegate{
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
guard let location = locations.last else {return}
let center = CLLocationCoordinate2D(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)
let region = MKCoordinateRegion.init(center: center, latitudinalMeters: regionInMeters, longitudinalMeters: regionInMeters)
mapView.setRegion(region, animated: true)
}
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
checkLocationAuthorization()
}
}
You are calling setRegion in didUpdateLocations - This will change the map region every time you get a location update; about once per second with best accuracy; even when the user isn’t moving
If you want user tracking on your map view, you should use the in-built userTrackingMode capabilities.
I am trying to display the current location of the user and have the region set to their current location.
Here is my code.
#IBOutlet weak var mapView: MKMapView!
var locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
self.locationManager.requestWhenInUseAuthorization()
if CLLocationManager.locationServicesEnabled() {
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
locationManager.startUpdatingLocation()
}
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let locValue:CLLocationCoordinate2D = manager.location!.coordinate
print("locations = \(locValue.latitude) \(locValue.longitude)")
let userLocation = locations.last
let viewRegion = MKCoordinateRegionMakeWithDistance((userLocation?.coordinate)!, 600, 600)
self.mapView.setRegion(viewRegion, animated: true)
}
What happens:
Map loads
Map region is set to current location
Map region will keep updating to the current location
Current location gets printed to the console
What doesn't work:
"Blue" current location indicator does not appear.
If you know what I need to do to make the "Blue" current location indicator appear it will be much appreciated.
You need to set
mapView.showsUserLocation = true
In viewDidLoad
I trying to record a path user is taking using GoogleMap SDK. I'm using polyline to draw line on a map to show user the path that is taken. In an attempt to cut down coordinates that is generated and to make line looks clean(instead of looking squiggly), I'm calling startMonitoringSignificantChange of CLLocationManger instead of startUpdatingLocation. However, that does not seem to work. It calls didUpdateLocations method just once when the view is loaded, but after that, it just stops calling. Where am I doing wrong?
This is my code
override func viewDidLoad() {
super.viewDidLoad()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters
locationManager.requestAlwaysAuthorization()
locationManager.startMonitoringSignificantLocationChanges()
}
extension LocationViewController: CLLocationManagerDelegate {
func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
if status == .AuthorizedAlways {
locationManager.startMonitoringSignificantLocationChanges()
mapView.myLocationEnabled = true
mapView.settings.myLocationButton = true
}
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
if let location = manager.location {
path.addCoordinate(CLLocationCoordinate2D(latitude: location.coordinate.latitude,
longitude: location.coordinate.longitude))
let polyline = GMSPolyline(path: path)
polyline.strokeColor = UIColor.redColor()
polyline.strokeWidth = 3
polyline.geodesic = true
polyline.map = mapView
// Save the coordinates to array
coordinateArray.append([location.coordinate.latitude, location.coordinate.longitude])
}
}
}
}
Add following lines of codes after locationManager.requestAlwaysAuthorization()
locationManager.allowsBackgroundLocationUpdates = true
locationManager.pausesLocationUpdatesAutomatically = false
p.s. If your view is holding locationManager instance, it may not receive location-updates after your view is un-loaded. You may remove following line as it is useless for significant-location-updates:
locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters
The delegate Methods of CLLocationManager
didChangeAuthorizationStatus
and
didUpdateToLocation
are not getting called.
Location Always Usage Description key is already added in info.plist and I am getting notification also when i launch app for the first time.
I am able to see the google map, but i am not able to see current location, When i change location, its not getting updated. Basicaaly delegate methods are not getting called.
//code
import UIKit
import GoogleMaps
class ViewController: UIViewController,GMSMapViewDelegate {
#IBOutlet weak var mapViewTest: GMSMapView!
let locationManager = CLLocationManager()
var currentLocation :CLLocation = CLLocation(latitude: 0.0, longitude: 0.0)
var currentLatitude : Double = 0.0
var currentLongitude : Double = 0.0
override func viewDidLoad()
{
super.viewDidLoad()``
locationManager.delegate = self
if (CLLocationManager.locationServicesEnabled())
{
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.allowsBackgroundLocationUpdates = true
locationManager.requestAlwaysAuthorization()
locationManager.startUpdatingLocation()
}
// Do any additional setup after loading the view, typically from a nib.
}
}
extension ViewController : CLLocationManagerDelegate
{
func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus)
{
if status == .authorizedAlways
{
if(CLLocationManager .locationServicesEnabled())
{
locationManager.startUpdatingLocation()
mapViewTest.isMyLocationEnabled = true
mapViewTest.settings.myLocationButton = true
}
}
}
func locationManager(manager: CLLocationManager, didUpdateToLocation newLocation: CLLocation, fromLocation oldLocation: CLLocation)
{
mapViewTest.camera = GMSCameraPosition(target: (newLocation.coordinate), zoom: 15, bearing: 0, viewingAngle: 0)
currentLocation = newLocation
currentLatitude = newLocation.coordinate.latitude
currentLongitude = newLocation.coordinate.longitude
}
func locationManager(manager: CLLocationManager, didFailWithError error: NSError)
{
print("Errors: " + error.localizedDescription)
}
}
From your code you are working with Swift 3, and in Swift 3 CLLocationManagerDelegate method's signature is changed like this.
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
}
//func locationManager(_ manager: CLLocationManager, didUpdateTo newLocation: CLLocation,
from oldLocation: CLLocation) is deprecated with below one
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
}
Check Apple Documentation on CLLocationManagerDelegate for more details.
After checking your code i found some changes you needs to do as follow,
note : I have only added the code having issue here that of location manager
import UIKit
import CoreLocation
class ViewController: UIViewController {
let locationManager = CLLocationManager()
var currentLocation :CLLocation = CLLocation(latitude: 0.0, longitude: 0.0)
var currentLatitude : Double = 0.0
var currentLongitude : Double = 0.0
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
locationManager.delegate = self
if (CLLocationManager.locationServicesEnabled())
{
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.allowsBackgroundLocationUpdates = true
locationManager.requestAlwaysAuthorization()
locationManager.startUpdatingLocation()
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
extension ViewController : CLLocationManagerDelegate {
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
}
func locationManager(_ manager: CLLocationManager, didFinishDeferredUpdatesWithError error: Error?) {
print("Errors: " + (error?.localizedDescription)!)
}
}
Also add below lines in .plist file if not added,
<key>NSLocationWhenInUseUsageDescription</key>
<string>$(PRODUCT_NAME) location use</string>
<key>NSLocationAlwaysUsageDescription</key>
<string>$(PRODUCT_NAME) always uses location </string>
Add these two properties in your info.plist
NSLocationWhenInUseUsageDescription
NSLocationAlwaysUsageDescription
you need to put the mapview delegate to self.
try this:
override func viewDidLoad() {
super.viewDidLoad()
// User Location Settings
locationManager.delegate = self
locationManager.requestWhenInUseAuthorization()
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.startUpdatingLocation()
// Google Maps Delegate
mapView.delegate = self
}
// View will appear
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
// Google maps settings
mapView.isMyLocationEnabled = true
mapView.settings.myLocationButton = true
// Get location if autorized
if (CLLocationManager.authorizationStatus() == CLAuthorizationStatus.authorizedWhenInUse) {
let (latitude, longitude) = self.getLocation()
mapView.camera = GMSCameraPosition.camera(
withLatitude: latitude,
longitude: longitude,
zoom: 14)
}
}
//Get the user location
func getLocation() -> (latitude: CLLocationDegrees, longitude: CLLocationDegrees) {
let latitude = (locationManager.location?.coordinate.latitude)!
let longitude = (locationManager.location?.coordinate.longitude)!
return (latitude, longitude)
}
I'm trying to calculate distance between 2 coordinates. For this I do:
func setupLocationManager() {
if CLLocationManager.authorizationStatus() == .NotDetermined {
locationManager.requestWhenInUseAuthorization()
}
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.startUpdatingLocation()
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let latitude = locations.last?.coordinate.latitude
let longitude = locations.last?.coordinate.longitude
let myLocation = CLLocation(latitude: latitude!, longitude: longitude!)
let targetLocation = CLLocation(latitude: 41.4381022, longitude: 46.604910)
let distance = myLocation.distanceFromLocation(targetLocation)
print(distance)
}
I'm checking in Google Maps there are 13 km distance! But my app shows me 2-3 km!
How can I improve that?
Google maps gives you the route distance between two locations, CLLocation gives you the birds-eye distance between two locations.
From the documentation:
This method measures the distance between the two locations by tracing
a line between them that follows the curvature of the Earth. The
resulting arc is a smooth curve and does not take into account
specific altitude changes between the two locations.
Here is an example based on a working GPS app.
import CoreLocation
public class SwiftLocation: NSObject, CLLocationManagerDelegate {
private let locationManager = CLLocationManager()
private var latestCoord: CLLocationCoordinate2D
init(ignore:String) {
locationManager.requestAlwaysAuthorization()
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.distanceFilter = kCLDistanceFilterNone
locationManager.startUpdatingLocation()
latestCoord = locationManager.location!.coordinate
super.init()
locationManager.delegate = self
}
private func locationManager(manager: CLLocationManager, didUpdateToLocation newLocation: CLLocation, fromLocation oldLocation: CLLocation) {
latestCoord = manager.location!.coordinate
}
public func getLatest() -> CLLocationCoordinate2D {
return latestCoord
}
}