MapView doesn't ask for location permission - ios

Question

I'm trying to build a mapView in Swift. It already worked but after I changed something I can't remember, I'm now getting the following error:
Trying to start MapKit location updates without prompting for location authorization. Must call -[CLLocationManager requestWhenInUseAuthorization] or -[CLLocationManager requestAlwaysAuthorization] first.
The NSLocationAlwaysUsageDescription is in my .plist file.
Here is the code:
import UIKit
import MapKit
class AwesomeMap : UIViewController, MKMapViewDelegate, CLLocationManagerDelegate {
var map: MKMapView?
var manager: CLLocationManager?
func setup() {
manager = CLLocationManager()
manager!.delegate = self
map!.delegate = self // map is being set from another controller
manager!.requestAlwaysAuthorization()
manager!.startUpdatingLocation()
}
func locationManager(manager: CLLocationManager!, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
println("permisison did change")
if(status == CLAuthorizationStatus.AuthorizedWhenInUse || status == CLAuthorizationStatus.Authorized) {
map!.showsUserLocation = true
}
}
func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
for location in (locations as Array) {
var loc = (location as CLLocation)
println(loc.coordinate.latitude)
let region = MKCoordinateRegion(center: loc.coordinate, span: MKCoordinateSpanMake(0.05, 0.05))
map!.setRegion(region, animated: true)
}
}
func locationManager(manager: CLLocationManager!, didFailWithError error: NSError!) {
println("fail")
}
}
Old code before implementing a few suggestions:
import UIKit
import MapKit
class AwesomeMap : UIViewController, MKMapViewDelegate, CLLocationManagerDelegate {
var manager = CLLocationManager()
var map: MKMapView?
func setup(mapView: MKMapView) { // passing the IBOutlet from another controller
// the change I made was around the following six lines I think...
map = mapView
map!.delegate = self
manager.delegate = self
manager.requestAlwaysAuthorization()
map!.showsUserLocation = true
manager.startUpdatingLocation()
}
func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
for location in (locations as Array) {
var loc = (location as CLLocation)
println(loc.coordinate.latitude)
let region = MKCoordinateRegion(center: loc.coordinate, span: MKCoordinateSpanMake(0.05, 0.05))
map!.setRegion(region, animated: true)
}
}
func locationManager(manager: CLLocationManager!, didFailWithError error: NSError!) {
println("fail") // nothing happens here
}
}

Answer 1

You're only allowed to call
map!.showsUserLocation = true
after your Location Manager has got the Permission to use the user Location.
Like in (got no swift version of this, but you'll probably get the point)
- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status
{
if(status == kCLAuthorizationStatusAuthorizedWhenInUse || status == kCLAuthorizationStatusAuthorizedAlways)
{
self.mapView.showsUserLocation = YES;
}
}

Answer 2

Go to Simulator settings
after that enter Location Services and turn on . if you need location blue dote in MapView enter <> and set << While Using the App >>

Answer 3

Do not call showsUserLocation when authorization status is undetermined.
func setup(mapView: MKMapView) { // passing the IBOutlet from another controller
map = mapView
map!.delegate = self
manager.delegate = self
manager.requestAlwaysAuthorization() // Does not if status is determined.
self.locationManager(manager: manager, status: CLLocationManager.authorizationStatus())
}
func locationManager(manager: CLLocationManager!, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
if status == .Authorized {
map!.showsUserLocation = true
manager.startUpdatingLocation()
}
}

Answer 4

I have this working code in my app (reduced):
if CLLocationManager.authorizationStatus() == CLAuthorizationStatus.Authorized {
manager.startUpdatingLocation()
}
additionaly, you can react on any user's authorization status changes:
func locationManager(manager: CLLocationManager!, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
if status == .Authorized {
manager.startUpdatingLocation()
}
}