iOS

With those guidelines in mind, let’s dig a little deeper into Core Location, the iOS location framework. The primary class you’ll work with when processing location is CLLocationManager, which allows you to specify criteria for the kind of data you want and publishes events when the location changes.

To specify the update frequency, CLLocationManager exposes the DistanceFilter property. This value of this property represents the distance in meters that the user must travel before a location update event is fired. Similarly, the DesiredAccuracy property allows you to declare how accurate you want the location to be. iOS will use this value to determine which sensors to use. There are several predefined values you can set this to, found on the CLLocation class: