Google maps - Update User location - ios

I am using Google maps SDK for iOS.
The isMyLocationEnabled is set to true.
Sometimes the use location updated to the right location. But sometimes the location is not updated.
I wanted to know if this option is using the original coordinates of the user? also, there is an option to update the user location? ) I am talking about the blue point.

May be this can help:
import Foundation
import CoreLocation
class Location: NSObject {
static let shared = Location()
var locationManager = CLLocationManager()
func locationManagerSetup() {
// Ask for Authorisation from the User.
locationManager.requestAlwaysAuthorization()
// If location services is enabled get the users location
if CLLocationManager.locationServicesEnabled() {
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestLocation()
locationManager.startUpdatigLocation()
}
}
}
extension Location: CLLocationManagerDelegate {
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
if let location = locations.first {
// do something
manager.stopUpdatingLocation()
}
else {
manager.requestLocation()
}
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
manager.requestLocation()
}
// If we have been deined access give the user the option to change it
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
if(status == CLAuthorizationStatus.denied) {
// do something
}
}
}

Related

My Current Location Shows a Different Location, Google Maps - Xcode

I have implemented Google Maps but my Current Location is always USA. I am testing it on REAL device and i have location permissions added in info.plist. Google API key is also implemented in didFinishLaunchingWithOptions method of AppDelegate.
<key>NSLocationWhenInUseUsageDescription</key>
<string>By accessing your location, this app can help you navigate between different locations.</string>
Here is my code. I'm following this tutorial by raywenderlich.com. https://www.raywenderlich.com/7363101-google-maps-ios-sdk-tutorial-getting-started I have downloaded the material of this tutorial, used my API Key but still my current location is always USA. Tested on multiple real devices.
import UIKit
import GoogleMaps
import CoreLocation
class MapViewController: UIViewController {
#IBOutlet weak var mapView : GMSMapView!
let locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
if CLLocationManager.locationServicesEnabled() {
locationManager.requestWhenInUseAuthorization()
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.startUpdatingLocation()
locationManager.delegate = self
self.mapView.delegate = self
} else {
locationManager.requestWhenInUseAuthorization()
}
}
}
CLLocationManagerDelegate:-
extension MapViewController: CLLocationManagerDelegate {
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
guard status == .authorizedWhenInUse else { return }
locationManager.startUpdatingLocation()
self.mapView.isMyLocationEnabled = true
self.mapView.settings.myLocationButton = true
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
guard let location = locations.first else { return }
// the coordinates i get here are always from some city in USA.
mapView.camera = GMSCameraPosition(
target: location.coordinate,
zoom: 15,
bearing: 0,
viewingAngle: 0)
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
print("Error: \(error)")
}
}
Please check the settings below as screenshot :

Open SwiftUI view only if location permission granted

I have a view (say V) in which a user answers a few questions and their location is recorded. However, the answers only make sense with the user's location.
So what I want is that when the user clicks on a button on the parent view, it takes them to V and immediately asks them for the location permission. If they accept, they can continue on to answer the questions, but if they deny, they navigate back to the parent screen.
I know I can navigate back to the parent screen with self.presentation.wrappedValue.dismiss().
But how do I know when the user has accepted or denied the permission since requestWhenInUseAuthorization() is an asynchronous function?
I'm following this tutorial on getting a user's location on iOS with Swift.
Code for my LocationService:
import CoreLocation
protocol LocationServiceDelegate {
func didFetchCurrentLocation(_ location: GeoLocation)
func fetchCurrentLocationFailed(error: Error)
}
class LocationService: NSObject, CLLocationManagerDelegate {
let locationManager = CLLocationManager()
var delegate: LocationServiceDelegate
init(delegate: LocationServiceDelegate) {
self.delegate = delegate
super.init()
self.setupLocationManager()
}
private func setupLocationManager() {
if canUseLocationManager() {
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
}
}
func requestLocation() {
if canUseLocationManager() {
print(CLAuthorizationStatus.self)
locationManager.requestWhenInUseAuthorization()
locationManager.requestLocation()
}
}
func requestPermission() {
locationManager.requestWhenInUseAuthorization()
}
private func canUseLocationManager() -> Bool {
return CLLocationManager.locationServicesEnabled()
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
print(locations)
if let location = locations.last {
let geoLocation = GeoLocation(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)
delegate.didFetchCurrentLocation(geoLocation)
}
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
print(error)
delegate.fetchCurrentLocationFailed(error: error)
}
deinit {
locationManager.stopUpdatingLocation()
}
}
struct GeoLocation {
var latitude: Double
var longitude: Double
}
CLLocationManagerDelegate has also the following method:
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
}
This method is called every time the authorization status changed. I would also like to recommend you implementing your LocationService as an ObservableObject instead of using delegate approach.

Permission popup appear multiple time

I have a project in swift 2.When I launch the app first time there are three different type of permissions popup (Push notification, Location, Photo) that appear on the splash screen.I have add the Permission for location and photos in info.plist
The problem is when the app lunched the one(location) popup appear and disappear without any click then other(photos) popup appear and disappear after few seconds without any click.After few seconds the popup appear one by one and now the popup are display on the screen until I click any one option.
I want to display the permission popup only once when user tap on the button.I have searched about it but all the solutions that I found are in latest version of swift. Any suggestion regarding this is appreciated.
import CoreLocation
private var locationManager: CLLocationManager!
private var locationHandler: ((location: CLLocation?,error: NSError?) -> Void)?
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestAlwaysAuthorization()
func requestCurrentLocation(completionHandler:((location: CLLocation?,error: NSError?)->Void)!) {
locationHandler = completionHandler
if #available(iOS 9.0, *) {
locationManager.requestLocation()
} else {
locationManager.startUpdatingLocation()
}
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
if let locationHandler = locationHandler, let location = locations.first {
locationHandler(location: location, error: nil)
self.locationHandler = nil
locationManager.stopUpdatingLocation()
}
}
func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
if let locationHandler = locationHandler {
locationHandler(location: nil, error: error)
self.locationHandler = nil
}
}
The key is CLLocationManager always alive
import CoreLocation
class LocationManager: NSObject {
static let shared = LocationManager()
private lazy var locationManager: CLLocationManager = {
let manager = CLLocationManager()
manager.desiredAccuracy = kCLLocationAccuracyBest
manager.delegate = self
return manager
}()
private override init() {
super.init()
}
func askForPermission() {
locationManager.requestWhenInUseAuthorization()
}
func requestLocation() {
locationManager.requestLocation()
}
}
extension LocationManager: CLLocationManagerDelegate {
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
// do something
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
// do something
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
// do something
}
}

fatal error: unexpectedly found nil while unwrapping an Optional value when getting Location?

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.

Delegate must respond to locationManager:didFailWithError: even though implemented didFailWithError method

For some reason Xcode thinks I'm not implementing didFailWithError method of the CLLocationManagerDelegate protocol
I fail to see what I'm doing wrong, as I literally copied from another SO post that said this didFailWithErrormethod was updated for Swift 3. So I don't understand why Xcode thinks I'm not implementing didFailWithError
Any insight would be greatly appreciated!
Code
class OptionsViewController: UIViewController,
CLLocationManagerDelegate {
var locationManager: CLLocationManager = CLLocationManager()
override func viewDidLoad() {
//Ask user for location
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
//Use users current location if no starting point set
if CLLocationManager.locationServicesEnabled() {
if CLLocationManager.authorizationStatus() == CLAuthorizationStatus.authorizedWhenInUse
|| CLLocationManager.authorizationStatus() == CLAuthorizationStatus.authorizedAlways {
locationManager.requestLocation()
}
else{
locationManager.requestWhenInUseAuthorization()
}
}
else{
//Alert user to open location service, bra bra bra here...
}
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
print("error:: \(error)")
}
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
print("didChangeAuthorization")
if status == CLAuthorizationStatus.authorizedWhenInUse
|| status == CLAuthorizationStatus.authorizedAlways {
locationManager.requestLocation()
}
else{
//other procedures when location service is not permitted.
}
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
print("Did update location called")
// let locValue:CLLocationCoordinate2D = manager.location!.coordinate
// print("locations = \(locValue.latitude) \(locValue.longitude)")
if locations.first != nil {
print("location:: (location)")
}
}
Aaaandd I realized it's b/c I needed to use an Error of a specific type (specifically Swift.Error)
This is the right method declaration for didFailWithError:
func locationManager(_ manager: CLLocationManager, didFailWithError error: Swift.Error) {

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