CLLocationManager如何获取位置？

Question

TL;DR: My objective: Try all forms of getting a location and then choose the most accurate one, (try get a location for a minute then time out).

I'm a little confused about where it gets the location from, is it GPS? Cellular? or a mix of both depending on toolkit?

While getting location on Android I used both and then choose which provider based on accuracy. I do not see anything similar for iOS.

I'm using CLLocationManager which is showing good accuracy but I'm not sure where the location is from.

Answer 1

On iOS, location manager is built more intelligently. Relying on your configuration, it either uses GPS or WiFi/cell radios, as described in the CLLocationManager documentation:

For the services you use, configure any properties associated with that service accurately. Core Location manages power aggressively by turning off hardware when it is not needed. For example, setting the desired accuracy for location events to one kilometer gives the location manager the flexibility to turn off GPS hardware and rely solely on the WiFi or cell radios, which can lead to significant power savings.

For more information, read CLLocationManager documentation .

EDIT

And, If you want the most accurate location, you should put kCLLocationAccuracyBestForNavigation for location manager's desiredAccuracy property.