Updating our map notes

updateMarkers.m

// Called to update fetch all annotations
- (void)updateMarkers
{
    // Get the current limits of the map view
    MKCoordinateSpan span = self.worldView.region.span;

    // KINVEY: Geo Queries use miles and there are ~69 miles per each latitudeDelta
    double distanceInMiles = span.latitudeDelta*69;
    CLLocationCoordinate2D mapCenter =  self.worldView.centerCoordinate;

    // KINVEY: Build a query against the "_geoloc" collection in your backend
    //         centered at mapCenter, with a distance of distanceInMiles
    KCSQuery *q = [KCSQuery queryOnField:@"_geoloc"
               usingConditionalsForValues:
                    kKCSNearSphere,
                    [NSArray arrayWithObjects:
                     [NSNumber numberWithFloat:mapCenter.longitude],
                     [NSNumber numberWithFloat:mapCenter.latitude], nil],
                    kKCSMaxDistance,
                    [NSNumber numberWithFloat:distanceInMiles], nil];

    // Kinvey: Set the query to our built query
    self.mapNotes.query = q;
    
    // Kinvey: Search for our annotations.  We'll populate the map in the delegate
    [self.mapNotes fetchWithDelegate:self];
}