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I'm developping my first iOS app, and this uses the user's location.
I know that the device asks the user whether to enable location services for the app, but how do I know if the user has enable it or not?
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The user can enable or disable location services from the Settings app by toggling the Location Services switch in General. You should check the return value of locationServiceEnabled() method before starting location updates to determine whether the user has location services enabled for the current device.
Turn off GPS There are ways your device could still be tracked even after turning off location services but not turning it off is worse. Turning off location services on your phone provides a layer of security against the most common location trackers.
Probably
[CLLocationManager authorizationStatus] != kCLAuthorizationStatusDenied
should be the answer
releated SO questions are:
Checking for iOS Location Services
locationServicesEnabled test passes when they are disabled in viewDidLoad
and yes, according to @albertamg suggestion, if you implement CLLocationManagerDelegate protocol
you will be notified if user deny access to Location Services when you're requesting it
see locationManager:didChangeAuthorizationStatus: and locationManager:didFailWithError: methods
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