i am using swift4.2 and Xcode 10 and i am trying to make iOS app uses location service and it gives me exception: Fatal error: Unexpectedly found nil while unwrapping an Optional value
so i tried to check if location returns nil so i copy my code and print location and it returns null , i simulated location in Xcode from product>scheme>edit scheme>default location and checked location in debug area and it simulated to location i choose any one know the problem?
import CoreLocation
class LocationVC: UIViewController,CLLocationManagerDelegate {
let locationManager = CLLocationManager()
var currentlocation:CLLocation!
override func viewDidLoad() {
super.viewDidLoad()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestWhenInUseAuthorization()
locationManager.startMonitoringSignificantLocationChanges()
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
authorizelocationstates()
}
func authorizelocationstates(){
if CLLocationManager.authorizationStatus() == .authorizedWhenInUse {
currentlocation = locationManager.location
print(currentlocation)
}
else{
locationManager.requestWhenInUseAuthorization()
authorizelocationstates()
}
}
I have run your code and I just added missing key Privacy - Location When In Use Usage Description in info.plist file.
And I have made some changes in your code and get nil value because method getting called multiple time and when user give permission and method again called and going to print location detail but the fact is stilllocationManager variable has not user location data yet.
get location details in locationManager when delegate didUpdateLocations called
I have done some changes in your code:
import UIKit
import CoreLocation
class ViewController: UIViewController,CLLocationManagerDelegate {
var locationManager = CLLocationManager()
var currentlocation:CLLocation!
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
// authorizelocationstates()
}
func authorizelocationstates(){
if CLLocationManager.authorizationStatus() == .authorizedWhenInUse {
currentlocation = locationManager.location
print(currentlocation)
}
else{
// Note : This function is overlap permission
// locationManager.requestWhenInUseAuthorization()
// authorizelocationstates()
}
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
locationManager = manager
// Only called when variable have location data
authorizelocationstates()
}
override func viewDidLoad() {
super.viewDidLoad()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
// Get Location Permission one time only
locationManager.requestWhenInUseAuthorization()
// Need to update location and get location data in locationManager object with delegate
locationManager.startUpdatingLocation()
locationManager.startMonitoringSignificantLocationChanges()
}
}
Hope it will help you.
I am using XCode v7.2.1, Simulator v9.2 .
I have a UIViewController which shows a map & is supposed to get my location & show it on map:
import UIKit
import MapKit
class LocationVC: UIViewController, MKMapViewDelegate {
#IBOutlet weak var map: MKMapView!
let locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
map.delegate = self
}
override func viewDidAppear(animated: Bool) {
if CLLocationManager.authorizationStatus() == .AuthorizedWhenInUse {
map.showsUserLocation = true
} else {
locationManager.requestWhenInUseAuthorization()
}
}
}
I have added the NSLocationWhenInUseUsageDescription in info.plist as shown below:
I have also selected the Debug -> Location -> Custom Location ... and set the longitude & latitude of Helsinki, Finland as shown below:
When I run my app, the map is shown, however it doesn't get my location. Why? (I mean I don't see the blue point in anywhere of the map).
===== UPDATE ====
I also tried this when my app is running, however it doesn't help either.
you are requesting the user's location, but not actually doing anything with the response. become the delegate of the location manager and respond to the authorization change.
this code works for me on 7.2.1 (after selecting "Apple" in Debug -> Location):
import UIKit
import MapKit
class ViewController: UIViewController, CLLocationManagerDelegate {
#IBOutlet weak var map: MKMapView!
let locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
locationManager.delegate = self
}
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
if CLLocationManager.authorizationStatus() == .AuthorizedWhenInUse {
map.showsUserLocation = true
} else {
locationManager.requestWhenInUseAuthorization()
}
}
func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
guard status == .AuthorizedWhenInUse else { print("not enabled"); return }
map.showsUserLocation = true
}
}
I agree with #Casey 's answer,but sometimes you need to do a little more with CLLocationManagerDelegate method.
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
if let location = locations.first {
//reset mapView's center in case your custom location was wrong.
map.centerCoordinate = location.coordinate
//mannual call show annotations to avoid some bugs
map.showAnnotations(map.annotations, animated: true)
}
}
you just have to add
locationManager.delegate = self
mapView.showsUserLocation = true
iOS newbie here. I'm adapting code from this tutorial ( http://rshankar.com/get-your-current-address-in-swift/ ) to get reverse geocoding work in my project(coordinate to physical address). My project have two view controllers and the main view controller has a button. I use segue to load the other view controller by overriding prepareforsegue in the main view controller. I have a class that implements CLLocationManagerDelegate. I just create this class to handle all location related functions. I initialize this class inside button pressed event of the main view controller. My problem is that I'm testing my project in iphone simulator and the alert box that asks use for permission to use location service is not shown. So the status parameter of didchangeauthrorization method always contain not determined. I've tried simulate location option but it does not resolve the issue. How do I resolve this?
ViewController.swift (main view)
class ViewController: UIViewController {
#IBAction func gpsButtonPressed(sender: UIButton) {
let coreLocation = CoreLocationController()
coreLocation.getLocation();
}
.....
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?)
{
if segue.identifier == "ShowGpsView"
{
if let destinationVC = segue.destinationViewController as? SecondViewController{
destinationVC.msg = "hello"
}
}
}
CoreLocationController.h
import UIKit
import CoreLocation
class CoreLocationController: NSObject, CLLocationManagerDelegate {
var locationManager = CLLocationManager()
var coords: CLLocationCoordinate2D?
override init() {
super.init()
self.locationManager.delegate = self
self.locationManager.desiredAccuracy = kCLLocationAccuracyBest
}
func getLocation()
{
if CLLocationManager.authorizationStatus() == .NotDetermined {
self.locationManager.requestWhenInUseAuthorization()
}
}
func locationManager(manager: CLLocationManager!,
didChangeAuthorizationStatus status: CLAuthorizationStatus)
{
if status == .AuthorizedWhenInUse {
manager.startUpdatingLocation()
}
}
func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
CLGeocoder().reverseGeocodeLocation(manager.location, completionHandler: {(placemarks, error)->Void in
if error != nil {
println("Reverse geocoder failed with error" + error.localizedDescription)
return
}
if placemarks.count > 0 {
let pm = placemarks[0] as! CLPlacemark
self.displayLocationInfo(pm)
} else {
println("Problem with the data received from geocoder")
}
})
}
func displayLocationInfo(placemark: CLPlacemark) {
locationManager.stopUpdatingLocation()
println(placemark.locality)
println(placemark.postalCode)
println(placemark.administrativeArea)
println(placemark.country)
}
}
Add NSLocationWhenInUseUsageDescription (which is a string) to you info.plist file.
Most of these authorisation requests need a corresponding entry in the plist.
When the app doesn't ask for permission it can only be one of three things:
the entry in the info.plist was not there
your app has already asked for permission and you need to reset these. (delete the app and all data, maybe even reset privacy settings)
your location manager / delegate are not set up correctly.
I tested the code posted below and it works. I also made some changes to make it safer/work. Some things might give an error because of Swift 2.0. Just replace them with your own parts.
when asking for the authorisation you also want to be able to catch it when it was denied.
you also want to have a way of starting the update when the authorisation has already been given. So auth changed is not a good way to handle that on it's own
you want to use a delegate method / completion handler to know when it found a location (this can take time, so when you don't the code will continue and crash because no location is found yet)
Updated code :
View
import UIKit
class ViewController: UIViewController, CoreLocationControllerDelegate {
var clTest : CoreLocationController = CoreLocationController()
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewDidAppear(animated: Bool) {
clTest.delegate = self
clTest.getAutorisation()
}
func foundLocation() {
print(clTest.coords)
}
}
Location
import UIKit
import CoreLocation
class CoreLocationController: NSObject, CLLocationManagerDelegate {
var locationManager = CLLocationManager()
var coords: CLLocationCoordinate2D?
var delegate : CoreLocationControllerDelegate?
private var authorised : Bool = false {
didSet {
if authorised == true {
locationManager.startUpdatingLocation()
}
}
}
override init() {
super.init()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
}
func getAutorisation()
{
if CLLocationManager.authorizationStatus() == .NotDetermined {
self.locationManager.requestWhenInUseAuthorization()
} else if CLLocationManager.authorizationStatus() == .AuthorizedWhenInUse {
authorised = true
} else if CLLocationManager.authorizationStatus() == .Denied {
// catch this
}
}
func locationManager(manager: CLLocationManager,
didChangeAuthorizationStatus status: CLAuthorizationStatus)
{
if status == .AuthorizedWhenInUse {
authorised = true
}
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
CLGeocoder().reverseGeocodeLocation(manager.location!, completionHandler: {(placemarks, error)->Void in
if error != nil {
print("Reverse geocoder failed with error" + error!.localizedDescription)
return
}
if placemarks!.count > 0 {
let pm = placemarks![0]
self.displayLocationInfo(pm)
} else {
print("Problem with the data received from geocoder")
}
})
}
func displayLocationInfo(placemark: CLPlacemark) {
locationManager.stopUpdatingLocation()
coords = placemark.location!.coordinate
delegate!.foundLocation()
print(placemark.locality)
print(placemark.postalCode)
print(placemark.administrativeArea)
print(placemark.country)
}
}
protocol CoreLocationControllerDelegate {
func foundLocation()
}
I have the following code and it should basically detect location (if location services are on), then goes back to previous page and shows the coordinates (when button clicked).
#IBOutlet var mapView:GMSMapView!// Adding Google Map check on Storyboard
var locationManager: CLLocationManager!
var viewController : ViewController! //to save the object of previous controller to send the location back
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
locationManager = CLLocationManager() // Intialize the location manager
locationManager.delegate = self
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
//Methos to change the MApType
#IBAction func changeMaptoEarthView()
{
self.mapView.mapType = kGMSTypeSatellite
}
#IBAction func changeMaptoMapView()
{
self.mapView.mapType = kGMSTypeNormal
}
//Method to get UserLocation
#IBAction func sendLocationtoPreviousView()
{
viewController.locationRecieved(locationManager.location)
self.performSegueWithIdentifier("backSegue", sender: nil)
}
#IBAction func addUserLocation() //Detect location click event
{
if(CLLocationManager.authorizationStatus() == .AuthorizedWhenInUse) // If already have location access
{
locationManager.startUpdatingLocation()
}
else if (CLLocationManager.authorizationStatus() == .Denied)// If location access is denied in setting
{
UIAlertView(title: "Permission", message: "Please allow location services in setting", delegate: nil, cancelButtonTitle: "ok").show()
}
else
{
locationManager.requestWhenInUseAuthorization() // Ask user permission if permission not given
}
}
//CLLocation Manager Delegate methoda
func locationManager(manager: CLLocationManager!, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
if status == .AuthorizedWhenInUse {
locationManager.startUpdatingLocation()
}
}
func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
if let location = locations.first as? CLLocation {
self.mapView.clear() // clear all overlay on Map
self.mapView.camera = GMSCameraPosition(target: location.coordinate, zoom: 15, bearing: 0, viewingAngle: 0)
// Adding pin on Current location
var marker = GMSMarker()
marker.position = location.coordinate
marker.snippet = "My Location"
marker.appearAnimation = kGMSMarkerAnimationPop
marker.map = mapView
locationManager.stopUpdatingLocation()
}
}
The app works in simulator until I say go back, then it throws nil error message on this line:
viewController.locationRecieved(locationManager.location)
What could be the reason? I can see the pin on the map although the map is not showing any graphics except google logo below
If you don't see the map graphic in your view (subclass of GMSMapView), this is because of the Google map API key , maybe you have not set it yet in your app delegate or its not set correctly !
make sure you have set the correct google API key with you app bundle id and your account in google . you have to set below code in your app delete , did didFinishLaunchingWithOptions function :
import GoogleMaps
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
GMSServices.provideAPIKey("your API Key")
}
The location property on CLLocationManager is an Optional - meaning that it can be nil. According to the docs, it will be nil if no location data has ever been retrieved.
You don't show how viewController.locationRecieved is defined, but my guess is that you've configured the CLLocation argument to an implicitly unwrapped optional (i.e., with a "!"). Passing nil to such an argument will cause a crash.
I am trying to convert an old app in ObjC to Swift as a practice exercise and have ran in to some issues. The way I had it in the old app, it was establishing the CLLocation Manager and then I would use:
manager = [[CLLocationManager alloc]init];
manager.delegate = self;
manager.desiredAccuracy = kCLLocationAccuracyBest;
[manager startUpdatingLocation]
which would call automatically:
-(void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation{
}
and from there I could extract all the information I needed. But in swift, there is no autocompletion of this method and I cannot figure out how to reproduce it. The documentation says that
startUpdatingLocation()
will still be called by the delegate, but it isn't happening.
This is what I have so far:
import UIKit
import corelocation
class ViewController: UIViewController,CLLocationManagerDelegate{
#IBOutlet var gpsResult : UILabel
var manager:CLLocationManager!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
manager = CLLocationManager()
manager.delegate = self
manager.desiredAccuracy = kCLLocationAccuracyBest
manager.startUpdatingLocation()
}
func locationManager(manager:CLLocationManager, didUpdateLocations locations:AnyObject[]) {
println("locations = \(locations)")
gpsResult.text = "success"
}
}
Any help or pointers on where to look would be appreciated. Thanks.
EDIT: Updated from Suggestions, but still not working
EDIT2: Seems to be some bug not allowing the method to work properly in the ViewController
You are missing two things. First, you have to ask for permission using requestAlwaysAuthorization or requestWhenInUseAuthorization(). So your viewDidLoad() should be like this:
var locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestAlwaysAuthorization()
locationManager.startUpdatingLocation()
}
Second, edit your Info.plist as indicated here.
First add this two line in plist file
NSLocationWhenInUseUsageDescription
NSLocationAlwaysUsageDescription
Then this is class working complete implement this
import UIKit
import CoreLocation
#UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, CLLocationManagerDelegate {
var window: UIWindow?
var locationManager: CLLocationManager!
var seenError : Bool = false
var locationFixAchieved : Bool = false
var locationStatus : NSString = "Not Started"
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {
initLocationManager();
return true
}
// Location Manager helper stuff
func initLocationManager() {
seenError = false
locationFixAchieved = false
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.locationServicesEnabled
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestAlwaysAuthorization()
}
// Location Manager Delegate stuff
// If failed
func locationManager(manager: CLLocationManager!, didFailWithError error: NSError!) {
locationManager.stopUpdatingLocation()
if (error) {
if (seenError == false) {
seenError = true
print(error)
}
}
}
func locationManager(manager: CLLocationManager!, didUpdateLocations locations: AnyObject[]!) {
if (locationFixAchieved == false) {
locationFixAchieved = true
var locationArray = locations as NSArray
var locationObj = locationArray.lastObject as CLLocation
var coord = locationObj.coordinate
println(coord.latitude)
println(coord.longitude)
}
}
// authorization status
func locationManager(manager: CLLocationManager!,
didChangeAuthorizationStatus status: CLAuthorizationStatus) {
var shouldIAllow = false
switch status {
case CLAuthorizationStatus.Restricted:
locationStatus = "Restricted Access to location"
case CLAuthorizationStatus.Denied:
locationStatus = "User denied access to location"
case CLAuthorizationStatus.NotDetermined:
locationStatus = "Status not determined"
default:
locationStatus = "Allowed to location Access"
shouldIAllow = true
}
NSNotificationCenter.defaultCenter().postNotificationName("LabelHasbeenUpdated", object: nil)
if (shouldIAllow == true) {
NSLog("Location to Allowed")
// Start location services
locationManager.startUpdatingLocation()
} else {
NSLog("Denied access: \(locationStatus)")
}
}
}
I'm not sure why, but it seems like startUpdatingLocation isn't presenting the user prompt on the iOS 7 simulator, but when I enabled it manually it worked as expected if I used the newer form of the delegate method:
var manager:CLLocationManager!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
manager = CLLocationManager()
manager.delegate = self
manager.desiredAccuracy = kCLLocationAccuracyBest
manager.startUpdatingLocation()
}
func locationManager(manager:CLLocationManager, didUpdateLocations locations:[AnyObject]) { // Updated to current array syntax [AnyObject] rather than AnyObject[]
println("locations = \(locations)")
}
The format you're using has been deprecated since iOS 5 or 6, so apparently it's not supported at all by the swift bridging layers.
had the same issue. didUpdateLocations - was not working. Run your app. Go to the Settings page -> Privacy -> Location and turn off Location Services. didFailWithError will catch the error about absent Location Services. Then turn it on. Since that moment didUpdateLocations will catch locations.
Here is my very simple code that works:
first add Core Location framework in General/Linked Frameworks and Libraries
then add following into Info.plist:
<key>NSLocationWhenInUseUsageDescription</key>
<string>blablabla</string>
<key>NSLocationAlwaysUsageDescription</key>
<string>blablabla</string>
this is my ViewController.swift file:
import UIKit
import CoreLocation
class ViewController: UIViewController, CLLocationManagerDelegate {
var locationManager:CLLocationManager!
override func viewDidLoad() {
super.viewDidLoad()
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestAlwaysAuthorization()
locationManager.startUpdatingLocation()
}
func locationManager(manager:CLLocationManager, didUpdateLocations locations: [CLLocation]) {
print("locations = \(locations)")
}
}
For Swift 3
import UIKit
import CoreLocation
class ViewController: UIViewController,CLLocationManagerDelegate {
var locationManager:CLLocationManager!
override func viewDidLoad() {
super.viewDidLoad()
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestAlwaysAuthorization()
locationManager.startUpdatingLocation()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func locationManager(_ manager:CLLocationManager, didUpdateLocations locations: [CLLocation]) {
print("locations = \(locations)")
}
}
I hope there are two ways.
var locationManager: CLLocationManager = CLLocationManager()
var initialLocation :CLLocation?
var updatedUserLocation :CLLocation?
override func viewDidLoad() {
super.viewDidLoad() {
//MapView Location
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
locationManager.requestWhenInUseAuthorization()
locationManager.startUpdatingLocation()
locationManager.startUpdatingHeading()
}
Implementing CLLocationManagerDelegate :
//CLLocationManager Delegate
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
// This only works when user location is updated.
gpsProviderStatusLabel.changeStatusToOn(gpsProviderStatusLabel)
}
func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
//Error indicates GPS permission restricted
gpsProviderStatusLabel.changeStatusToOff(gpsProviderStatusLabel)
//Initial Location
initialLocation = locations.first
//Getting Updated Location
updatedUserLocation = locations.last
}
Checking CLLocationDelegate Authorization:
func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
//This method does real time status monitoring.
switch status {
case .NotDetermined:
print(".NotDetermined")
break
case .AuthorizedAlways:
print(".AuthorizedAlways")
gpsProviderStatusLabel.changeStatusToOn(gpsProviderStatusLabel)
break
case .Denied:
print(".Denied")
gpsProviderStatusLabel.changeStatusToOff(gpsProviderStatusLabel)
break
case .AuthorizedWhenInUse:
print(".AuthorizedWhenInUse")
gpsProviderStatusLabel.changeStatusToOn(gpsProviderStatusLabel)
break
case .Restricted:
print(".Restricted")
break
default:
print("Unhandled authorization status")
break
}
}
Note: changeStatusToOn or changeStatusToOff is a UILabel Extenion method which makes the Label text On/Off with Green/Red Colors.
don't forget to add
NSLocationWhenInUseUsageDescription or
NSLocationAlwaysUsageDescription
in your configuration file (target/Info/custom iOS target properties
Add bellow 2 property in info.plist
NSLocationWhenInUseUsageDescription : Location information is used for fraud prevention
Privacy - Location Usage Description : Location information is used for fraud prevention
If you want to get the user location updated by default, without clicking 'Simulate location' everytime, go to
YourProject-->Build Phases-->Link Binary with libraries-->Add corelocation.framework
The location gets updated automatically/by default when you run the app in the simulator. Tested and works in Swift 2 !
This will ask for permission and track if given permission else quit with an alert. Stops tracking on back button press.
info.plist
<key>NSLocationAlwaysUsageDescription</key>
<string>Allow tracking while completing a survey</string>
Class:
import UIKit
import CoreLocation
class LocationViewController: BaseViewController, CLLocationManagerDelegate {
// MARK: Constants
private static let enableLocationServices = [
"title" : "Location",
"message" : "Enable location services",
"buttonTitle" : "OK"
]
// MARK: Private variables
private var manager: CLLocationManager?
// MARK: UIViewCOntroller methods
#IBAction func backButtonPressed(sender : UIButton) {
stopTracking()
detatchLocationManager()
dismissViewControllerAnimated(true, completion: nil)
}
override func viewDidLoad() {
super.viewDidLoad()
attachLocationManager()
}
// Mark: Location
func locationManager(manager: CLLocationManager,
didChangeAuthorizationStatus status: CLAuthorizationStatus)
{
if status == .AuthorizedAlways {
manager.startUpdatingLocation()
} else if status != .NotDetermined {
showEnableLocationServicesAlert()
}
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
for location in locations {
getDependencyService().getProject().appendLocationTrackingFile(location.timestamp, latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)
}
}
// MARK: LocationViewController
private func attachLocationManager() {
manager = CLLocationManager()
manager?.delegate = self
manager?.desiredAccuracy = kCLLocationAccuracyBest
if CLLocationManager.authorizationStatus() != .AuthorizedAlways {
manager?.requestAlwaysAuthorization()
} else if CLLocationManager.locationServicesEnabled() {
startTracking()
}
}
private func detatchLocationManager() {
manager?.stopUpdatingLocation()
manager?.delegate = nil
manager = nil
}
private func startTracking() {
manager?.startUpdatingLocation()
}
private func stopTracking() {
manager?.stopUpdatingLocation()
}
private func showEnableLocationServicesAlert() {
getDependencyService().getUiHelper().showAlert(FrogFirstSurveyViewController.enableLocationServices, completion: {
self.dismissViewControllerAnimated(true, completion: nil)
})
}
}
Swift:
Add following in
import CoreLocation
class YourViewController: UIViewController
{
var locationManager:CLLocationManager!
}
//MARK:- Location Manager
extension YourViewController: CLLocationManagerDelegate {
func stratLocationManager()
{
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
self.checkUsersLocationServicesAuthorization()
locationManager.startUpdatingLocation()
}
func checkUsersLocationServicesAuthorization(){
/// Check if user has authorized Total Plus to use Location Services
if CLLocationManager.locationServicesEnabled()
{
switch CLLocationManager.authorizationStatus()
{
case .notDetermined:
// Request when-in-use authorization initially
// This is the first and the ONLY time you will be able to ask the user for permission
self.locationManager.delegate = self
locationManager.requestWhenInUseAuthorization()
break
case .restricted, .denied:
// Disable location features
PrintLogs("Location Access Not Available")
break
case .authorizedWhenInUse, .authorizedAlways:
// Enable features that require location services here.
PrintLogs("Location Access Available")
break
}
}
}
func locationManager(_ manager:CLLocationManager, didUpdateLocations locations: [CLLocation]) {
print("locations = \(locations)")
}
}
Just call the init(vc : UIViewController).
import Foundation
import CoreLocation
import UIKit
class LocManager : NSObject{
var permission : ((Bool?)->())?
private var locationManager : CLLocationManager!
init(_ vc : UIViewController) {
super.init()
self.locationManager = CLLocationManager()
self.locationManager.delegate = vc as? CLLocationManagerDelegate
setUpLocationManagerDelegate()
}
}
extension LocManager : CLLocationManagerDelegate {
fileprivate func setUpLocationManagerDelegate(){
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestAlwaysAuthorization()
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
if let lat = locations.last?.coordinate.latitude, let long = locations.last?.coordinate.longitude{
print("\n\nThe current Lat/Long Is Here\n\n")
let coordinates = CLLocationCoordinate2D(latitude: lat, longitude: long)
}else{
print("Unable To Access Locaion")
}
}
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
switch status {
case .authorizedAlways,.authorizedWhenInUse:
print("Good to go and use location")
locationManager.startUpdatingLocation()
self.callPermisssionCompletion(val: true)
case .denied:
print("DENIED to go and use location")
self.callPermisssionCompletion(val: false)
case .restricted:
print("DENIED to go and use location")
self.callPermisssionCompletion(val: nil)
case .notDetermined:
print("DENIED to go and use location")
self.callPermisssionCompletion(val: nil)
default:
print("Unable to read location :\(status)")
}
}
fileprivate func callPermisssionCompletion(val : Bool?){
guard let comp = self.permission else {
print("\n\n Unable to locate completions \n\n")
return
}
if let val = val{
comp(val)
}
}
}