iOS Swift Use CLLocationManager to find the approximate location indoors

For an app I do, I track the user's location on a map. When I'm outside, I can get the coordinates of the user position almost immediately and the app works great. As expected, the device does not have a GPS signal, so I can not retrieve the location. That said, iOS uses Wi-Fi and various other techniques to show my approximate location on a MapView. However, I can not determine the approximate indoor co-ordinate, although iOS knows (ie didUpdateLocations is never called indoors, but it's the second I walk through the door). I wonder if there's a way to get an approximate interior coordinate (I do not need exactly).