SpeedometerExtensions.swift

import CoreLocation

extension String {
  static let isKPH = "isKPH"
}

extension CLLocationManager {
  func speed(multipliedBy multiplier: Double) -> Double {
    return Double((location?.speed ?? 0.0) * multiplier)
  }
  
  func start(delegate: CLLocationManagerDelegate) {
    self.delegate = delegate
    requestWhenInUseAuthorization()
    desiredAccuracy = kCLLocationAccuracyBest
    startUpdatingLocation()
  }
}