CODEWITHSUNDEEP
ioscore-locationcllocationmanagercllocation
Joost
Joost

Reputation: 173

Detect when optimal location accuracy is reached with CLLocationManager

I'm currently working on an app that uses CLLocationManager with the lowest accuracy (kCLLocationAccuracyThreeKilometers). However, once every couple minutes I need to get an accurate location of the user, so I set the accuracy to kCLLocationAccuracyBest when a timer expires.

Obviously, CLLocationManager starts updating the location, going from an inaccurate location to more accurate locations in steps. The problem is, however, that I don't know how to detect when the optimal location accuracy has been reached, so I never know when I have the best location to work with.

Does anybody know a solution to this problem? It would be highly appreciated.

Upvotes: 4

Views: 7615

Answers (2)

rckoenes
rckoenes

Reputation: 69499

IN the CLLocationManagerDelegate method locationManager:didUpdateLocations: look at the horizontalAccuracy of CLLocation. This will give you the radius in meters.

As stated in documentation:

The radius of uncertainty for the location, measured in meters. (read-only)

The location manager will keep trying in getting the best accuracy as possible, so you will have to decide when the location is accurate enough.

Upvotes: 9

datwelk
datwelk

Reputation: 1037

Similar functionality is implemented in detail by Apple in the sample project "LocateMe". Check out GetLocationViewController from LocateMe here: https://developer.apple.com/library/ios/samplecode/locateme.

Upvotes: 2

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