Objective-c search locations with radius

Solutions Collect From Internet About “Objective-c search locations with radius”

If you have CLLocations then something like this would work:

// Given NSArray *locations as an array of CLLocation* that you wish to filter

// and given a radius...
CLLocationDistance radius = kSomeRadius;

// and given a target you want to test against...
CLLocation* target = [[CLLocation alloc] initWithLatitude:someLat longitude:someLon];

NSArray *locationsWithinRadius = [locations objectsAtIndexes:
                                 [locations indexesOfObjectsPassingTest:
                                  ^BOOL(id obj, NSUInteger idx, BOOL *stop) {

                                      return [(CLLocation*)obj distanceFromLocation:target] < radius;


[target release];

There are other ways to do this of course. This is just one way.

Hope that helps.