locationManager:didExitRegion: not called when app is running

Question

I have an app with a location manager that runs with startUpdatingLocation. However, if it hasn't moved then i stopUpdatingLocation, mark the current location as a region and startMonitoringForRegion like so:

[locationManager stopUpdatingLocation];

CLRegion* region = [[CLRegion alloc] initCircularRegionWithCenter:self.currentLocation.coordinate radius:25 identifier:@"last_loc"];

[self.locationManager startMonitoringForRegion:region desiredAccuracy:kCLLocationAccuracyNearestTenMeters];

[region release];

When the app is completely shut down and I exit the region, locationManager:didExitRegion is called and I continue on my merry way like so:

- (void)locationManager:(CLLocationManager *)manager didExitRegion:(CLRegion *)region
{       
    [self.locationManager stopMonitoringForRegion:region];

    [locationManager startUpdatingLocation];
}

However, if the app is running, either in the background or foreground, the app won't respond to locationManager:didExitRegion. What am I missing?

Answer 1

Be sure to initialize the coordinate property. If you want the coordinate to be the user's current location, use [your location manager].location.coordinate.latitude and [your location manager].location.coordinate.longitude as the initialization properties. If you require altitude, include [your location manager].location.altitude, [your location manager].location.horizontalAccuracy, [your location manager].location.verticalAccuracy, and [your location manager].location.timeStamp. Without this information, you create a region that has no coordinate, but still exists. Essentially, it has a name, but no real information.