MapView does not ask for placement permission
I am trying to build a mapView in Swift. This already worked, but after I changed something I can't remember, now I get the following error:
Trying to start MapKit location updates without prompting for location authorization. Must call -[CLLocationManager requestWhenInUseAuthorization] or -[CLLocationManager requestAlwaysAuthorization] first.
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 doing a few sentences:
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
}
}
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4 answers
You are allowed to call
map!.showsUserLocation = true
after your location manager has permission to use the user's location.
As in (there is no quick version of this, but you will probably get the point)
- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status
{
if(status == kCLAuthorizationStatusAuthorizedWhenInUse || status == kCLAuthorizationStatusAuthorizedAlways)
{
self.mapView.showsUserLocation = YES;
}
}
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I have this working code in my application (shorthand):
if CLLocationManager.authorizationStatus() == CLAuthorizationStatus.Authorized {
manager.startUpdatingLocation()
}
Additionally, you can react to any changes in the user's authorization status:
func locationManager(manager: CLLocationManager!, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
if status == .Authorized {
manager.startUpdatingLocation()
}
}
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Do not call showUserLocation when authorization status is undefined.
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()
}
}
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