CKLocationSortDescriptor
An object for sorting records that contain location data.
Declaration
class CKLocationSortDescriptorOverview
You can add a location sort descriptor to your queries when searching for records. At creation time, you must provide the sort descriptor with a key that has a CLLocation object as its value. The sort descriptor uses the value of that key to perform the sort.
CloudKit computes distance by drawing a direct line between the two locations that follows the curvature of the Earth. Distances don’t account for altitude changes between the two locations.