How to use locationManager() in multiple ViewControllers - ios

Question

I need to get the zipCode and the city in multiple viewControllers.
Here is how I'm currently doing it...
import CoreLocation
let locationManager = CLLocationManager()
class MyViewController: UIViewController, CLLocationManagerDelegate{
override func viewDidLoad() {
super.viewDidLoad()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestWhenInUseAuthorization()
}
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
CLGeocoder().reverseGeocodeLocation(manager.location!, completionHandler: {(placemarks, error)-> Void in
if error != nil {
//AlertView to show the ERROR message
}
if placemarks!.count > 0 {
let placemark = placemarks![0]
self.locationManager.stopUpdatingLocation()
let zipCode = placemark.postalCode ?? ""
let city:String = placemark.locality ?? ""
// Do something with zipCode
// Do something with city
}else{
print("No placemarks found.")
}
})
}
func someFunction() {
locationManager.startUpdatingLocation()
}
Everything works fine but as you can see doing it this way in multiple viewController leads to a lot of code repetition (of course, I'm not showing the whole code).
What would be the most common way to retrieve the zipCode and city from CLLocationManager() in a more practical way from multiple viewControllers?
What I'm thinking is something like...
MyLocationManager.zipCode() // returns zipCode as a string
MyLocationManager.city() // returns city as a string

Answer 1

The usual thing is to have just one location manager in one persistent place that you can always get to from anywhere, like the app delegate or the root view controller.

Answer 2

I tried to implement a singleton CLLocationManager class, I think you can modify the following class to implement some additional methods.
import Foundation
class LocationSingleton: NSObject, CLLocationManagerDelegate {
private let locationManager = CLLocationManager()
private var latitude = 0.0
private var longitude = 0.0
static let shared = LocationSingleton()
private override init() {
super.init()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.distanceFilter = kCLLocationAccuracyHundredMeters
locationManager.requestAlwaysAuthorization() // you might replace this with whenInuse
locationManager.startUpdatingLocation()
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
if let location = locations.last {
latitude = location.coordinate.latitude
longitude = location.coordinate.longitude
}
}
private func getLatitude() -> CLLocationDegrees {
return latitude
}
private func getLongitude() -> CLLocationDegrees {
return longitude
}
private func zipCode() {
// I think you can figure way out to implemet this method
}
private func city() {
// I think you can figure way out to implemet this method
}
}