I am using GPS in iphone and it show conformation message for use location service. and i want to trap what user select "Allow" or "No". can any one suggest how i do this?
Thank
You don't get a direct callback from this alert. However, if the user does not allow Core Location usage, you'll receive a -locationManager:didFailWithError: with a kCLErrorDenied error to your CLLocationManagerDelegate.
Since iOS 4.2, you can also listen to -locationManager:didChangeAuthorizationStatus: or check the authorizationStatus of CLLocationManager. This gives you a detailed status.
来源：https://stackoverflow.com/questions/3668214/how-to-trap-the-location-alert-response-iphone