How can I calculate the total distance traveled use CoreLocation in Swift
I haven't been able to so far find any resources for how to do this in Swift for iOS 8,
How would you calculate the total distance moved since you began tracking your location?
From what I've read so far, I need to save location of a points, then calculate the distance between current point, and last point, then add that distance to a totalDistance variable
Objective-C is extremely unfamiliar to me, so I haven't been able to work out the swift syntax
Here is what I've worked out so far, not sure if I'm doing it right. Though the distanceFromLocationmethod is returning all 0.0 so obviously something is wrong
func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
var newLocation: CLLocation = locations[0] as CLLocation
oldLocationArray.append(newLocation)
var totalDistance = CLLocationDistance()
var oldLocation = oldLocationArray.last
var distanceTraveled = newLocation.distanceFromLocation(oldLocation)
totalDistance += distanceTraveled
println(distanceTraveled)
}
update: Xcode 8.3.2 • Swift 3.1
The problem there is because you are always getting the same location over and over again. Try like this:
import UIKit
import MapKit
class ViewController: UIViewController, CLLocationManagerDelegate {
@IBOutlet weak var mapView: MKMapView!
let locationManager = CLLocationManager()
var startLocation: CLLocation!
var lastLocation: CLLocation!
var startDate: Date!
var traveledDistance: Double = 0
override func viewDidLoad() {
super.viewDidLoad()
if CLLocationManager.locationServicesEnabled() {
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestWhenInUseAuthorization()
locationManager.startUpdatingLocation()
locationManager.startMonitoringSignificantLocationChanges()
locationManager.distanceFilter = 10
mapView.showsUserLocation = true
mapView.userTrackingMode = .follow
}
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
if startDate == nil {
startDate = Date()
} else {
print("elapsedTime:", String(format: "%.0fs", Date().timeIntervalSince(startDate)))
}
if startLocation == nil {
startLocation = locations.first
} else if let location = locations.last {
traveledDistance += lastLocation.distance(from: location)
print("Traveled Distance:", traveledDistance)
print("Straight Distance:", startLocation.distance(from: locations.last!))
}
lastLocation = locations.last
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
if (error as? CLError)?.code == .denied {
manager.stopUpdatingLocation()
manager.stopMonitoringSignificantLocationChanges()
}
}
}