CLLocation Manager in Swift to get Location of User

Question

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 CLLocatio

Answer 1

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.

Answer 2

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)")
    }

}

Answer 3

don't forget to add NSLocationWhenInUseUsageDescription or NSLocationAlwaysUsageDescription in your configuration file (target/Info/custom iOS target properties

Answer 4

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.

Answer 5

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.

Answer 6

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)")
    }
}