CLLocationManager authorization message - ios

Question

Hello i am using CLLocation to my app and i have initialise my CLLocationManager like this:
func initLocationManager(){
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters
let authstate = CLLocationManager.authorizationStatus()
if(authstate == CLAuthorizationStatus.NotDetermined || authstate == CLAuthorizationStatus.Denied){
println("Not Authorised")
locationManager.requestWhenInUseAuthorization()
}
locationManager.startUpdatingLocation()
}
And i have also added the NSLocationAlwaysUsageDescription and NSLocationWhenInUseUsageDescription key to my plist.
The first time i open my app i get the prompt message that my app want to access location and it has 2 buttons allow and dont allow. if i click on the dont allow button and close the app, when i opened it again i dont get the prompt message again.
How can i make this prompt message to appear each time the user opens the app? Thank you

Answer 1

Prompting alert each time is not a valid approach.
For an alternative you can show alert only in that case when Location Service is
disabled or "Dont Allow" initially.
Following code promt alert at first and a custom alert when Location Service is Disabled
import UIKit
import CoreLocation
class ViewController: UIViewController,CLLocationManagerDelegate {
var locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
initLocationManager()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func initLocationManager(){
let status = CLLocationManager.authorizationStatus()
if(status == CLAuthorizationStatus.NotDetermined) {
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters
let iosVersion = NSString(string: UIDevice.currentDevice().systemVersion).doubleValue
if iosVersion >= 8.0 {
//For Foreground
locationManager.requestWhenInUseAuthorization()
}
locationManager.startUpdatingLocation()
} else {
if(status != CLAuthorizationStatus.AuthorizedWhenInUse) {
var alert = UIAlertView(title: "Location", message: "Please turn on Location Services", delegate: nil, cancelButtonTitle: "Cancel")
alert.addButtonWithTitle("Open Setting")
alert.show()
/*Add Action on Open Setting alertbutton to directly open settings in iOS 8 and later
-> UIApplication.sharedApplication().openURL(NSURL(string: UIApplicationOpenSettingsURLString)!)*/
}
}
}
}

Answer 2

There is no way of doing it once the user declines, you have to show a dialog explaining to the user that he/she has to go to Settings and manually allow the functionality.

Answer 3

This message is asking for the permission to use GPS of your device and try to getting location of the device that's why GPS is much needed on. For second you don't want to show it you can make a condition with NSUseDefaults and store a key then don't call the method locationmanager startupdatinglocation. This is the only way to don't show it again otherwise it will show everytime.