monitoring.swift

var locationManager: CLLocationManager = {    
  let locationManager = CLLocationManager()
  locationManager.delegate = self
  locationManager.allowsBackgroundLocationUpdates = true
  return locationManager
}()

var region:CLBeaconRegion {   
  let region = CLBeaconRegion(proximityUUID: uuid, identifier: identifier)
  region.notifyEntryStateOnDisplay = true
  return region
}

locationManager.startMonitoring(forRegion: region)