I've got this code:
override func viewDidLoad() {
super.viewDidLoad()
locationManager.delegate = self
locationManager.requestWhenInUseAuthorization()
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.startUpdatingLocation()
}
and this code:
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let userLocation = locations.last
print(userLocation)
let camera = GMSCameraPosition.cameraWithLatitude(userLocation!.coordinate.latitude,
longitude: userLocation!.coordinate.longitude, zoom: 12.5)
self.mapView.camera = camera
self.mapView.myLocationEnabled = true
// self.mapView.settings.myLocationButton = true
locationManager.stopUpdatingLocation()
}
This was working earlier but now it seems like locationManager isn't even being called as the print statement isn't returning any information at all. There are no errors in the code and I can't seem to figure out why the function isn't being called. Can anyone spot anything obvious that I'm missing?
Thank you
I just implemented this and I'm going to say you what I've done
First, you create a locationManager variable
let locationManager: CLLocationManager = CLLocationManager()
You have to request permission in the viewDidLoad()
viewMap.delegate = self
locationManager.delegate = self
locationManager.requestWhenInUseAuthorization()
Then, I created an extension and I implemented the delegate
extension MyView: CLLocationManagerDelegate {
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
//here you configure the locationManager
locationManager.startUpdatingLocation()
viewMap.isMyLocationEnabled = true
viewMap.settings.myLocationButton = true
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
}
}
I hope this help you, here works properly.
Related
Below is my code. I am trying to have my map start off by being zoomed in to a certain number in xcode. It doesn't seem to work that way. Every time I open the map now, it's completely zoomed out to a point where you can see the entire continent. Any help will be much appreciated.
import UIKit
import MapKit
import CoreLocation
class YogaMap: UIViewController{
#IBOutlet weak var Yoga: MKMapView!
let locationManager = CLLocationManager()
let regionInMeters: Double = 100
override func viewDidLoad(){
super.viewDidLoad()
checkLocationServices()
}
func setupLocationManager(){
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
}
func centerViewOnUserLocation(){
if let location = locationManager.location?.coordinate{
let region = MKCoordinateRegion.init(center: location, latitudinalMeters: regionInMeters, longitudinalMeters: regionInMeters)
Yoga.setRegion(region, animated: true)
}
}
func checkLocationServices(){
if CLLocationManager.locationServicesEnabled(){
setupLocationManager()
checkLocationAuthorization()
} else {
}
}
func checkLocationAuthorization(){
switch CLLocationManager.authorizationStatus(){
case .authorizedWhenInUse:
centerViewOnUserLocation()
break
case .denied:
break
case .notDetermined:
locationManager.requestWhenInUseAuthorization()
break
case .restricted:
break
case .authorizedAlways:
break
}
}
}
extension YogaMap: CLLocationManagerDelegate {
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
}
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
}
}
Thanks
You should wait for location manager to return a location before trying to use centerViewOnUserLocation. Try moving your function call inside locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation])
You forgot call startUpdatingLocation in this function func setupLocationManager
func setupLocationManager(){
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.startUpdatingLocation()
}
Center map view when your location update
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
centerViewOnUserLocation()
}
In iOS geolocation, the code works if the locationManager is declared and initialized separately, however it does not work if it is declared and initialized at the same time. Why is it so? The following is the working code sample:-
var locationManager : CLLocationManager!
func initLocManager() {
locationManager=CLLocationManager()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
locationManager.activityType = .automotiveNavigation
locationManager.distanceFilter = 10.0
}
func retrieveLocation(){
initLocManager()
locationManager.requestAlwaysAuthorization()
locationManager.startUpdatingLocation()
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
for location in locations {
print("Long \(location.coordinate.longitude)")
print("Lati \(location.coordinate.latitude)")
}
}
whereas the following code does not work:-
var locationManager = CLLocationManager()
func initLocManager() {
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
locationManager.activityType = .automotiveNavigation
locationManager.distanceFilter = 10.0
}
func retrieveLocation(){
initLocManager()
locationManager.requestAlwaysAuthorization()
locationManager.startUpdatingLocation()
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
for location in locations {
print("Long \(location.coordinate.longitude)")
print("Lati \(location.coordinate.latitude)")
}
}
Another way:
Create new file with this code:
import UIKit
import CoreLocation
class LocationManager: CLLocationManager, CLLocationManagerDelegate {
static let shared = LocationManager()
public var currentLocation = CLLocation() {
didSet {
NotificationCenter.default.post(name: NSNotification.Name(rawValue: LocationManager.LocationUpdatedNotification), object: self, userInfo: nil)
}
}
static let LocationUpdatedNotification: String = "LocationUpdate"
private override init() {
super.init()
self.delegate = self
self.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
self.activityType = .automotiveNavigation
self.distanceFilter = 10.0
self.requestAlwaysAuthorization()
self.startUpdatingLocation()
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
if let lastLocation = locations.last {
currentLocation = lastLocation
}
}
}
In AppDelegate.swift
_ = LocationManager.shared // Add this line to func didFinishLaunchingWithOptions
Now you can get current user location using this code:
LocationManager.shared.currentLocation
Also you can subscribe for LocationUpdate notification anywhere in your project.
I am developing an app using swift I want to fetch current location of the user and want to show in google map so I wrote my code in my class I have included all the functions and methods (i.e) added and imported frameworks core location and also updated plist but I can't able to fetch current location rotationally some time I get the location but some time it crashed.
Here is the code what I am tried.
import CoreLocation
class HomeViewController: UIViewController, CLLocationManagerDelegate {
override func viewDidLoad() {
super.viewDidLoad()
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.requestWhenInUseAuthorization()
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.distanceFilter = kCLDistanceFilterNone
locationManager.startUpdatingLocation()
let location: CLLocation? = locationManager.location
let coordinate: CLLocationCoordinate2D? = location?.coordinate ----> App crossed this line then it will crashed
print(coordinate!)
print(coordinate!.latitude)
print(coordinate!.longitude)
strForCurLatitude = "\(coordinate!.latitude)"
strForCurLongitude = "\(coordinate!.longitude)"}
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
if status == .authorizedWhenInUse {
print("User allowed us to access location")
}
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
print("Error while get location \(error)")
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
locationManager.startUpdatingLocation()
let locationNew = locations.last
let coordinateNew: CLLocationCoordinate2D? = locationNew?.coordinate
strForCurLatitude = "\(coordinateNew!.latitude)"
strForCurLongitude = "\(coordinateNew!.longitude)"
strForLat=strForCurLatitude;
strForLong=strForCurLongitude;
print("User's Latitude is: \(Double(strForLat!)!)")
print("User's Longitude is: \(Double(strForLong!)!)")
self.locationManager.startUpdatingLocation()
}
Remove this from ViewDidLoad because you can not get location in viewDidLoad.
let location: CLLocation? = locationManager.location
let coordinate: CLLocationCoordinate2D? = location?.coordinate
print(coordinate!)
print(coordinate!.latitude)
print(coordinate!.longitude)
strForCurLatitude = "\(coordinate!.latitude)"
strForCurLongitude = "\(coordinate!.longitude)"
In CLLocationManager's following method best for getting location
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
}
make a reference to CLLocationManager as variable, like this:
class HomeViewController {
var locationManager = CLLocationManager()
viewDidLoad() {
super.viewDidLoad()
}
// rest of code
}
in this case Location Manager should works properly.
I would like to show user's current location on startup, and then keep tracking their location but stop centring on the current location. My idea is to centre on the current location in viewDidLoad(), but I don't know how to wait for locationManager to update the current location before centring. Here are the relevant parts of my code:
var currentLocation : CLLocation?
#IBOutlet weak var mapView: MKMapView!
override func viewDidLoad() {
super.viewDidLoad()
if CLLocationManager.locationServicesEnabled() {
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.delegate = self
locationManager.requestWhenInUseAuthorization()
locationManager.startUpdatingLocation()
// wait for currentLocation to be updated
animateMap(currentLocation!)
}
mapView.showsUserLocation = true
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
currentLocation = locations.last!
}
func animateMap(_ location: CLLocation) {
let region = MKCoordinateRegionMakeWithDistance(location.coordinate, 1000, 1000)
mapView.setRegion(region, animated: true)
}
You need to simply call that animateMap(currentLocation!) function in delegate method didUpdateLocations where you are initializing the currentLocation.
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
currentLocation = locations.last!
animateMap(currentLocation!)
//Either Call `stopUpdatingLocation()`
locationManager.stopUpdatingLocation()
//Or you can create one boolean property with default value false and compare it inside this method
if !animatedFlag {
animateMap(currentLocation!)
animatedFlag = true
}
}
var animatedFlag = false
// MARK:- Location lattitude longtitude method Delegate Methods
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation])
{
if locationManager.location != nil
{
let locValue = (locationManager.location?.coordinate)!
lat = locValue.latitude
long = locValue.longitude
}
}
Call the animateMap function in didUpdateLocations delegate method, instead of in viewDidLoad. And, allow the map to center only the first time. You can you some bool variable for that.
var isLocationUpdated = false
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
currentLocation = locations.last!
if (!isLocationUpdated)
{
animateMap(currentLocation!)
isLocationUpdated = true
}
}
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)
}