didEnterRegion firing for all my geofences - swift

Question

All my geofences are triggering when GPS enters a defined region, at first I thought it was because of the radius, however even after halving it I am having the same problem.
import UIKit
import CoreLocation
class itemDesc {
var title: String
var coordinate: CLLocationCoordinate2D
var regionRadius: CLLocationDistance
var location: String
var type: String
init(title: String, coordinate: CLLocationCoordinate2D, regionRadius: CLLocationDistance, location: String, type: String) {
self.title = title
self.coordinate = coordinate
self.regionRadius = regionRadius
self.location = location
self.type = type
}
}
class ViewController: UIViewController, CLLocationManagerDelegate {
let locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
locationManager.delegate = self
locationManager.requestAlwaysAuthorization()
locationManager.startUpdatingLocation()
locationManager.desiredAccuracy = kCLLocationAccuracyBest
setupData()
}
func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
}
func locationManager(manager: CLLocationManager, monitoringDidFailForRegion region: CLRegion?, withError error: NSError) {
print("Monitoring failed for region with identifier: \(region!.identifier)")
}
func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
print("Location Manager failed with the following error: \(error)")
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let locValue:CLLocationCoordinate2D = manager.location!.coordinate
print("locations = \(locValue.latitude) \(locValue.longitude)")
}
func handleRegionEvent(region: CLRegion!) {
print("Geofence triggered \(region.identifier)")
}
func locationManager(manager: CLLocationManager, didEnterRegion region: CLRegion) {
if region is CLCircularRegion {
handleRegionEvent(region)
}
}
func locationManager(manager: CLLocationManager, didExitRegion region: CLRegion) {
if region is CLCircularRegion {
}
}
func setupData(){
if CLLocationManager.isMonitoringAvailableForClass(CLCircularRegion.self) {
let itemRegion = [
itemDesc( title: "DOOR", coordinate: CLLocationCoordinate2DMake(00.497699, 00.575095), regionRadius: 0.5, location: "DOOR", type: "exterior"),
itemDesc( title: "BARN FRONT", coordinate: CLLocationCoordinate2DMake(00.49751, 00.575149), regionRadius: 0.5, location:"BARN FRONT", type: "exterior"),
itemDesc( title: "GRASS", coordinate: CLLocationCoordinate2DMake(00.497337, 00.575069), regionRadius: 0.5, location: "GRASS ", type: "nature")]
for item in itemRegion {
let coordinate = item.coordinate
let regionRadius = item.regionRadius
let title = item.title
let region = CLCircularRegion(center: coordinate, radius: regionRadius, identifier: title)
locationManager.startMonitoringForRegion(region)
}
} else{
print("system can't track regions")
}
}
}
Using (0.497337, 0.575069) I'd only expect the GRASS fence to be triggered, this is not happening.
Outputs:
regionRadius = 1.0
locations = 37.33233141 -122.0312186
locations = 37.33233141 -122.0312186
locations = 0.497337 0.575069
Geofence triggered BARN FRONT
Geofence triggered DOOR
Geofence triggered GRASS

regionRadius = 0.5
locations = 37.33233141 -122.0312186
locations = 37.33233141 -122.0312186
locations = 0.497337 0.575069
Geofence triggered BARN FRONT
Geofence triggered DOOR
Geofence triggered GRASS
Although even at 1m this should not have been a problem:
The fourth decimal place is worth up to 11 m
The fifth decimal place is worth up to 1.1 m
The sixth decimal place is worth up to 0.11 m

Answer 1

The best accuracy with the GPS chip and kCLLocationAccuracyBestForNavigation is often just 10 meters.
Apple says (in the Location & Maps PG) that the minimum distance for regions should be assumed to be 200m
as pointed out by this answer - it will help but not please you
https://stackoverflow.com/a/23931552/2027018

Answer 2

If it helps anybody out who stumbles across this, I didn't get any further with CLRegion.
Instead, I went with CLLocation class and use .distanceFromLocation and worked out the distance for each of my regions/locations.