My distance in miles calculation seems wrong in swift 3 - swift3

Question

I have a user's current location and a particular location. I am trying to get distance in miles. my distance in miles seems wrong, I got 1.2 miles on my app, then I checked the miles in google map. I got 2.1 miles on google map. Here is my code, I am not sure why my code is not accurate. Please help.
var locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
map.delegate = self
map.userTrackingMode = MKUserTrackingMode.follow
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestWhenInUseAuthorization()
locationManager.startUpdatingLocation()
// set location
let latitude: CLLocationDegrees = 32.5850
let longitude: CLLocationDegrees = -85.4904
let latDelta: CLLocationDegrees = 0.05
let lonDelta: CLLocationDegrees = 0.05
let span: MKCoordinateSpan = MKCoordinateSpan(latitudeDelta: latDelta, longitudeDelta: lonDelta)
let coordinates = CLLocationCoordinate2D(latitude: latitude, longitude: longitude)
let region = MKCoordinateRegion(center: coordinates, span: span)
map.setRegion(region, animated: true)
// add annotation
let annotation = MKPointAnnotation()
annotation.title = "1100 S College St"
annotation.coordinate = coordinates
map.addAnnotation(annotation)
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let userLocation: CLLocation = locations[0]
let latitude = userLocation.coordinate.latitude
let longitude = userLocation.coordinate.longitude
let location1 = CLLocation(latitude: 32.5850, longitude: -85.4904) // set location
let location2 = CLLocation(latitude: latitude, longitude: longitude) // user's current location
let distanceInMeters : CLLocationDistance = location1.distance(from: location2) // distance in meters
let distanceInMiles = distanceInMeters/1609.344 // distance in miles
let roundUp = String(format:"%.1f", distanceInMiles) // round up
distanceLabel.text = "\(roundUp) mi"
}

Answer 1

This part is correct:
let distanceInMiles = distanceInMeters/1609.344 // distance in miles
Check distance in meters and compare with Google Maps.
If you are in iOS 10 you can use new Measurement and related classes like this:
let meters = 1000.0
let distanceMeters = Measurement(value: meters, unit: UnitLength.meters)
let distanceMiles = distanceMeters.converted(to: UnitLength.miles)
let miles = distanceMeters.converted(to: UnitLength.miles).value
This code produces this results:

Answer 2

Swift 4 , XCode9
extension CLLocation {
func myDistance(coordinate: CLLocation)->String{
let distanceInMeters = self.distance(from: coordinate)
if distanceInMeters < 1000 {
return distanceInMeters.description + " M"
}else{
let distanceInKilometer = distanceInMeters / 1000
return String(format:"%.1f", distanceInKilometer) + " KM"
}
}
}