CoreLocation kCLErrorDomain error 5

Question

I subclassed a CLRegion to support Polygons via overriding containsCoordinate: to use ray casting logic instead of the original distance crunching logi

Answer 1

This error could also rise up if added CLRegion is nil.

Answer 2

It also happens if you:

stop monitoring a region

[self.manager stopMonitoringForRegion:region];

and request the state for all monitored regions shortly afterwards:

for (CLRegion *region in self.manager.monitoredRegions) {
    [self.manager requestStateForRegion:region];
}

you will get the kCLErrorDomain 5 because IOS seems to have disabled the monitoring for that region, but has not yet removed it from the monitoredRegions array

monitoringDidFailForRegion CLCircularRegion (identifier:'Home', center:<...>, radius:102.00m) The operation couldn’t be completed. (kCLErrorDomain error 5.)
monitoredRegion: CLCircularRegion (identifier:'Home', center:<...>, radius:102.00m)
monitoredRegion: CLBeaconRegion (identifier:'BeaconHome', uuid:<..., major:(null), minor:(null))
monitoredRegion: CLCircularRegion (identifier:'D...', center:<...>, radius:101.00m)
monitoredRegion: CLCircularRegion (identifier:'W...', center:<..>, radius:51.00m)

to work around that problem, do something like this:

- (void)locationManager:(CLLocationManager *)manager monitoringDidFailForRegion:(CLRegion *)region withError:(NSError *)error
{
    NSLog(@"monitoringDidFailForRegion %@ %@",region, error.localizedDescription);
    for (CLRegion *monitoredRegion in manager.monitoredRegions) {
        NSLog(@"monitoredRegion: %@", monitoredRegion);
    }
    if ((error.domain != kCLErrorDomain || error.code != 5) &&
        [manager.monitoredRegions containsObject:region]) {
        NSString *message = [NSString stringWithFormat:@"%@ %@",
            region, error.localizedDescription];
        [AlertView alert:@"monitoringDidFailForRegion" message:message];
    }
}

Answer 3

It is also possible to get this error code back when your latitude and longitude values don't make sense. (I'd transposed them, for example, and was vexed by this error for a while.)

Answer 4

I got this error because i did not start the Bluetooth. So... do not forget to start your Bluetooth ;)

Answer 5

I hate to answer my own question, but I have found the solution to my issue. A kCLErrorDomain code/error of 5 denotes that you have tried to monitor more than 20 CLRegions. In my case, both subclasses were guilty of monitoring more than 20 regions.

Answer 6

If anybody is still struggling with this then take a look here:

In my case, I had to call requestAlwaysAuthorization just before calling startMonitoring and it worked like charm!

locationManager.requestAlwaysAuthorization()

let currRegion = CLCircularRegion(center: CLLocationCoordinate2D(latitude: LAT, longitude: LONG, radius: 100, identifier: "MyLocation")
currRegion.notifyOnEntry = true

locationManager.startMonitoring(for: region)

Btw, I would love to thank https://shrikar.com/swift-tutorial-corelocation-and-region-monitoring-in-ios-8/ for this.