I want to use Background Fetch Location Updates service on my app. But don't show any output my codes here i want your help.
import CoreLocation
class ViewController: UIViewController, UITextFieldDelegate, CLLocationManagerDelegate {
var locationManager:CLLocationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
self.locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestAlwaysAuthorization()
locationManager.startUpdatingLocation()
}
func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
print("didChangeAuthorizationStatus")
switch status {
case .NotDetermined:
print(".NotDetermined")
break
case .Authorized:
print(".Authorized")
self.locationManager.startUpdatingLocation()
break
case .Denied:
print(".Denied")
break
default:
print("Unhandled authorization status")
break
}
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let location = locations.last as CLLocation!
print("didUpdateLocations: \(location.coordinate.latitude), \(location.coordinate.longitude)")
}
Giving output only
didChangeAuthorizationStatus
.NotDetermined
If it possible i want to take long lat value when new location changes.
Thank you !
I added this to the info.plist file:
<key>NSLocationAlwaysUsageDescription</key>
<string>Your message goes here</string>
<key>NSLocationWhenInUseUsageDescription</key>
<string>Your message goes here</string>
Related
I need to get the geographical coordinates on Mac OS. Here is my code, but an error is reported when running: domain = kclerrordomain code = 0 "(null)"
import Cocoa
import CoreLocation
let locationManager:CLLocationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
//设置定位服务管理器代理
locationManager.delegate = self
//设置定位进度
locationManager.desiredAccuracy = kCLLocationAccuracyBest //最佳定位
//更新距离
// locationManager.distanceFilter = 100
//发出授权请求
locationManager.requestAlwaysAuthorization()
if (CLLocationManager.locationServicesEnabled()){
//允许使用定位服务的话，开始定位服务更新
// print("定位开始")
}
}
extension ViewController:CLLocationManagerDelegate{
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
//获取最新的坐标
let currLocation : CLLocation = locations.last! // 持续更新
print("纬度:\(currLocation.coordinate.latitude) 纬度:\(currLocation.coordinate.longitude) 海拔:\(currLocation.altitude) 水平精度:\(currLocation.horizontalAccuracy) 垂直精度:\(currLocation.verticalAccuracy) 方向:\(currLocation.course) 速度:\(currLocation.speed)")
}
func locationManager(_ manager: CLLocationManager,
didChangeAuthorization status: CLAuthorizationStatus) {
print("location manager auth status changed to:" )
switch status {
case .restricted:
print("status restricted")
case .denied:
print("status denied")
case .authorized:
print("已授权")
locationManager.startUpdatingLocation()
case .notDetermined:
print("status not yet determined")
default:
print("unknown state: \(status)")
}
}
func locationManager(_ manager: CLLocationManager,
didFailWithError error: Error) {
print( "location manager failed with error \(error)" )
}
}
enter image description here
When running application:
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You need to add location usage description in your info.plist file. After adding your info.plist should look like this .
Add this line in viewDidLoad.
manager.startUpdatingLocation()
Then add the delegate method that updates the location.
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
print(locations.last?.coordinate)
}
I am using Google maps SDK with swift 3.I want to get the current location on a map but I am not able to get current location in the real device but in the simulator, it shows the location of apple.But on the real device, it shows the current location of set in the app scheme otherwise it shows the error "Error: Error Domain=kCLErrorDomain Code=0 "(null)"". I am using below code to get the current location.Please help me.This code works in ios 10 but not work in ios 9
#IBOutlet weak var view_map: GMSMapView!
let locationManager = CLLocationManager()
var didFindMyLocation = false
override func viewDidLoad() {
super.viewDidLoad()
view_map.isMyLocationEnabled = true
// //Location Manager code to fetch current location
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestWhenInUseAuthorization()
if #available(iOS 9.0, *) {
locationManager.allowsBackgroundLocationUpdates = true
locationManager.requestLocation()
}
locationManager.startUpdatingLocation()
}
//Location Manager delegates
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let location = locations.last
let camera = GMSCameraPosition.camera(withLatitude: (location?.coordinate.latitude)!, longitude: (location?.coordinate.longitude)!, zoom: 17.0)
self.view_map.animate(to: camera)
//Finally stop updating location otherwise it will come again and again in this delegate
self.locationManager.stopUpdatingLocation()
}
// Handle authorization for the location manager.
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
switch status {
case .restricted:
print("Location access was restricted.")
case .denied:
print("User denied access to location.")
// Display the map using the default location.
view_map.isHidden = false
case .notDetermined:
print("Location status not determined.")
case .authorizedAlways: fallthrough
case .authorizedWhenInUse:
print("Location status is OK.")
}
}
// Handle location manager errors.
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
locationManager.stopUpdatingLocation()
print("Error: \(error)")
}
//Add these in your info.plist
<key>NSLocationAlwaysUsageDescription</key>
<string>Reason to access location background usage description</string>
<key>NSLocationWhenInUseUsageDescription</key>
<string>Reason to access location usage description</string>
I'm trying to animate where the user is when they accepts location tracking. The Code works when they already have accepted location tracking and then loads the view but I would like to have the view reload when they press accept on location tracking.
override func viewDidLoad() {
super.viewDidLoad()
//Prepare to get User
if CLLocationManager.authorizationStatus() != .authorizedAlways {
// May need to change to support location based notifications
locationManager.requestAlwaysAuthorization()
print("hello")
mapView.setVisibleMapRect(mapView.visibleMapRect, animated: true)
}else {
locationManager.startUpdatingLocation()
}
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
mapView.delegate = self
}
Animated to user location Code
//Get user location
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
//Show the map at the users current location
let location = locations[0]
let span:MKCoordinateSpan = MKCoordinateSpanMake(0.02,0.02 )
let myLocation:CLLocationCoordinate2D = CLLocationCoordinate2DMake(location.coordinate.latitude, location.coordinate.longitude)
let region:MKCoordinateRegion = MKCoordinateRegionMake(myLocation, span)
mapView.setRegion(region, animated: true)
self.mapView.showsUserLocation = true
locationManager.stopUpdatingLocation()
}
You can use:
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
switch status {
case .notDetermined:
locationManager.requestAlwaysAuthorization()
break
case .authorizedWhenInUse:
locationManager.startUpdatingLocation()
break
case .authorizedAlways:
locationManager.startUpdatingLocation()
break
default:
break
}
}
All methods used to update locations in CLLocationManager are asynchronous, so there might be a delay from the user allowing location access to the location update actually happening regardless of the implementation of your code.
However, by calling CLLocationManager().requestLocation() inside locationManager(didChangeAuthorizationStatus) you can ensure that you receive a location update as close as possible to the acceptance of location usage.
func locationManager(manager: CLLocationManager!, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
switch status {
case .notDetermined:
locationManager.requestAlwaysAuthorization()
case .authorizedWhenInUse:
locationManager.requestLocation()
case .authorizedAlways:
locationManager.requestLocation()
default:
break
}
}
This will automatically call your CLLocationManagerDelegate method as soon as the asynchronous requestLocation function finishes execution.
I'm working on an app that requires getting the user's current coordinates. I was planning on doing this through CLLocationManager's didUpdateLocations method. For some reason, didUpdateLocations is not being executed. However, it appears that locationManager.startUpdatingLocation() is being called successfully. None of the other possible solutions I've seen on this site have worked for me. I already added NSLocationAlwaysUsage to info.plist. Here is the entirety of my code:
import UIKit
import MapKit
import CoreLocation
var region: MKCoordinateRegion!
class ViewController: UIViewController, CLLocationManagerDelegate, MKMapViewDelegate {
#IBOutlet weak var map: MKMapView!
var locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
self.locationManager.requestAlwaysAuthorization()
self.locationManager.requestWhenInUseAuthorization()
switch CLLocationManager.authorizationStatus() {
case .authorizedWhenInUse, .authorizedAlways:
if CLLocationManager.locationServicesEnabled() {
locationManager.startUpdatingLocation()
print("Updating location now")
}
case .notDetermined:
locationManager.requestAlwaysAuthorization()
case .restricted, .denied:
print("User must enable access in settings")
break
}
if (region == nil){
}
else {
map.setRegion(region!, animated: true)
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
print("Got location")
let userLocation:CLLocation = locations[0]
let lat:CLLocationDegrees = userLocation.coordinate.latitude
let long:CLLocationDegrees = userLocation.coordinate.longitude
let currentPos:CLLocationCoordinate2D = CLLocationCoordinate2DMake(lat, long)
didUpdateRegion(position: currentPos)
print(lat)
print(long)
}
func didUpdateRegion(position: CLLocationCoordinate2D) {
let span = MKCoordinateSpanMake(0.075, 0.075)
region = MKCoordinateRegion(center: position, span: span)
}
func locationManager(_manager: CLLocationManager, didFailWithError error: Error) {
print(error.localizedDescription)
}
func locationManager(manager: CLLocationManager!, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
switch status {
case .notDetermined:
// If status has not yet been determied, ask for authorization
manager.requestWhenInUseAuthorization()
break
case .authorizedWhenInUse:
// If authorized when in use
manager.startUpdatingLocation()
break
case .authorizedAlways:
// If always authorized
manager.startUpdatingLocation()
break
case .restricted:
print("User must activate location services in settings")
break
case .denied:
print("User must activate location services in settings")
break
default:
break
}
}
When I run this code on both the simulator and an actual device, I get the notification to allow location tracking. After accepting that, the console displays "Updating location now," but never gets to printing "Got location." Thank you for any light you can shed on this issue, I'm new to app development in general.
EDIT: I added in the entirety of my code instead of just the parts I thought were relevant. Basically, I'm trying to get the region shown on the map to follow the user. I attempt to do this by updating the variable "region" every time the didUpdateLocations function fires.
Am I getting it right and you only added one key - NSLocationAlwaysUsage?
Try to add both keys to the Info.plist:
Privacy - Location When In Use Usage Description
Privacy - Location Always Usage Description
Also, what happens if you implement this method of protocol?
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
print("\(error.localizedDescription)")
}
Does it print anything? Sorry, I was going to leave a comment, but I don't have enough reputation.
I'm struggling with Google Maps' myLocation property, I always get nil, and can't figure out why. In my ViewDidLoad i set the following
map.myLocationEnabled = true
And in the function which gets called when the user wants to get his/her location, I run this:
print(map.myLocation)
I get that the first time it might got no location, but shouldn't I get a location after a while?
I thought the same thing as well but you actually need to get the user's location first through Apple's CLLocationManager api. import CoreLocation and make your VC adhere to CLLocationManagerDelegate and use the didUpdateLocations method to get the user's current location then reflect it unto GMaps.
import UIKit
import GoogleMaps
import CoreLocation
class MapVC: UIViewController
{
#IBOutlet weak var googleMap: GMSMapView!
var locationManager: CLLocationManager = CLLocationManager()
override func viewDidLoad()
{
super.viewDidLoad()
locationManager.delegate = self
locationManager.requestWhenInUseAuthorization()
}
override func didReceiveMemoryWarning()
{
super.didReceiveMemoryWarning()
}
}
extension MapVC: CLLocationManagerDelegate
{
func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus)
{
switch status
{
case .AuthorizedAlways:
print("Location AuthorizedAlways")
googleMap.myLocationEnabled = true
locationManager.startUpdatingLocation()
case .AuthorizedWhenInUse:
print("Location AuthorizedWhenInUse")
googleMap.myLocationEnabled = true
locationManager.startUpdatingLocation()
case .Denied:
print("Location Denied")
googleMap.myLocationEnabled = false
locationManager.stopUpdatingLocation()
case .NotDetermined:
print("Location NotDetermined")
googleMap.myLocationEnabled = false
locationManager.stopUpdatingLocation()
case .Restricted:
print("Location Restricted")
googleMap.myLocationEnabled = false
locationManager.stopUpdatingLocation()
}
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation])
{
if locations.count > 0
{
googleMap.camera = GMSCameraPosition.cameraWithTarget((locations.last?.coordinate)!, zoom: 10.0)
googleMap.settings.myLocationButton = true
}
}
}