iOS swift Location Manager not getting updated properly

Question

I am using CLLocationManager for getting user location. I need to update user location when they move. I am using this code :

import UIKit

import CoreLocation

class ViewController: UIViewController, CLLocationManagerDelegate {

    private var locationManager = CLLocationManager()
    lazy var locations = [CLLocation]()
    var op:String = ""
    @IBOutlet weak var resultTxt: UITextView!

    @IBAction func Start(sender: AnyObject) {
        startLocationManager()
        showResult()
    }
    override func viewDidLoad() {
        super.viewDidLoad()
    }

    func startLocationManager(){
        locationManager.delegate = self
        locationManager.allowsBackgroundLocationUpdates = true
        locationManager.distanceFilter = kCLDistanceFilterNone
        locationManager.pausesLocationUpdatesAutomatically = false
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        locationManager.requestWhenInUseAuthorization()
        locationManager.requestAlwaysAuthorization()
        locationManager.startUpdatingLocation()
    }

    func startLocationTracking() {
        NSLog("startLocationTracking")
        if CLLocationManager.locationServicesEnabled() {
            switch(CLLocationManager.authorizationStatus()) {
            case .NotDetermined, .Restricted, .Denied:
                print("No access")
                self.startLocationManager()
            case .AuthorizedAlways, .AuthorizedWhenInUse:
                NSLog("authorizationStatus authorized")
            }
        } else {
            print("Location services are not enabled")
            self.startLocationManager()
        }
    }

    func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        for location in locations {
            let howRecent = location.timestamp.timeIntervalSinceNow

            if abs(howRecent) < 10 && location.horizontalAccuracy < 20 {
                //update distance
                self.locations.append(location)
                showResult()
            }
        }
    }

    func showResult(){
        let currentDate = NSDate()
        let res:String = "Result LAT : \(self.locations.last?.coordinate.latitude) AND LNG : \(self.locations.last?.coordinate.longitude)  Time : \(currentDate.toShortTimeString()) \n "
        op += res
        self.resultTxt.text = op
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }

}

And I have already added NSLocationAlwaysUsageDescription and NSLocationWhenInUseUsageDescription in .plist. This code works fine for the first time. But when the user moves "didUpdateLocations" is not getting fired. Can any one please help me, what I am doing wrong?

score 0 · Answer 1 · answered Jun 16 '16 at 11:38

0

Try to add these lines, to be able to monitoring significant location changes when user moves:

locationManager.startMonitoringSignificantLocationChanges()
locationManager.distanceFilter = 300 //value is up to you

answered Jun 16 '16 at 11:38

Evgeny Karkan

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Have you tried to simulate location changes? It could be done directly in iOS Simulator. – Evgeny Karkan Jun 16 '16 at 11:50
Ya... I am testing it on device – Rupshikha Jun 16 '16 at 12:00
I see, ok, maybe the distance that you did is not enough to fire the location update?... – Evgeny Karkan Jun 16 '16 at 12:03
May be.. But I am using locationManager.distanceFilter = kCLDistanceFilterNone. And I also commented this line ... if abs(howRecent) < 10 && location.horizontalAccuracy < 20 – Rupshikha Jun 16 '16 at 12:05
Sorry I can't find - where are you calling this function `startLocationTracking()` ? – Evgeny Karkan Jun 16 '16 at 12:10
I am calling the method on a button press. @IBAction func Start(sender: AnyObject) { startLocationManager() showResult() } – Rupshikha Jun 16 '16 at 12:11
Try to check `CLLocationManager.authorizationStatus()` value before calling `startLocationManager()` – Evgeny Karkan Jun 16 '16 at 12:14
So the status is .AuthorizedAlways or .AuthorizedWhenInUse right? – Evgeny Karkan Jun 16 '16 at 12:22
Ok, sorry have no ideas, try to delete and install app from scratch. And take a look at this thread http://stackoverflow.com/questions/34286288/startmonitoringsignificantlocationchanges-not-working-in-swift – Evgeny Karkan Jun 16 '16 at 12:24

iOS swift Location Manager not getting updated properly

1 Answers1