Using MKDirections to get Map Directions and Routes not working - ios

Question

i am trying to provide the user with a navigation direction with the click of a button. But for some reason it doesn't seem to be working.
#IBAction func directionToDestination(sender: AnyObject) {
getDirections()
}
func getDirections(){
let request = MKDirectionsRequest()
let destination = MKPlacemark(coordinate: CLLocationCoordinate2DMake(place.latitude, place.longitude), addressDictionary: nil)
request.setSource(MKMapItem.mapItemForCurrentLocation())
request.setDestination(MKMapItem(placemark: destination))
request.transportType = MKDirectionsTransportType.Automobile
var directions = MKDirections(request: request)
directions.calculateDirectionsWithCompletionHandler({(response:
MKDirectionsResponse!, error: NSError!) in
if error != nil {
// Handle error
} else {
self.showRoute(response)
}
})
}
func showRoute(response: MKDirectionsResponse) {
for route in response.routes as! [MKRoute] {
placeMap.addOverlay(route.polyline,level: MKOverlayLevel.AboveRoads)
for step in route.steps {
println(step.instructions)
}
}
}
func mapView(mapView: MKMapView!, rendererForOverlay
overlay: MKOverlay!) -> MKOverlayRenderer! {
let renderer = MKPolylineRenderer(overlay: overlay)
renderer.strokeColor = UIColor.blueColor()
renderer.lineWidth = 5.0
return renderer
}
here is how my viewDidLoad() looks
manager = CLLocationManager()
manager.delegate = self
manager.requestWhenInUseAuthorization()
placeMap.delegate = self
can someone please point what am i doing wrong with a sample code in swift ?

Answer 1

Here is a full working sample for getting the users location and getting directions to a destination coordinate.
import UIKit
import MapKit
class ViewController: UIViewController, MKMapViewDelegate, CLLocationManagerDelegate {
#IBOutlet weak var mapView: MKMapView!
var locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
mapView.showsUserLocation = true
mapView.delegate = self
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestWhenInUseAuthorization()
locationManager.startUpdatingLocation()
}
#IBAction func directionToDestinationButtonPressed(_ sender: UIButton) {
guard let userLocationCoordinate = UserLocation.shared.location?.coordinate else { return }
let directionRequest = MKDirections.Request()
directionRequest.source = MKMapItem(
placemark: MKPlacemark(
coordinate: userLocationCoordinate
)
)
directionRequest.destination = MKMapItem(
placemark: MKPlacemark(
coordinate: CLLocationCoordinate2D(latitude: 47.6205, longitude: -122.3493)
)
)
directionRequest.transportType = .automobile
let directions = MKDirections(request: directionRequest)
directions.calculate { (response, error) in
guard let response = response else { return }
let route = response.routes.first
if let line = route?.polyline {
self.mapView.addOverlay(line, level: .aboveRoads)
}
}
}
//MARK: - MKMapViewDelegate
func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
if let polyLine = overlay as? MKPolyline {
let lineRenderer = MKPolylineRenderer(polyline: polyLine)
lineRenderer.strokeColor = .red
lineRenderer.lineWidth = 3
return lineRenderer
}
return MKOverlayRenderer()
}
//MARK: - CLLocationManagerDelegate
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
UserLocation.shared.location = locations.first
}
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
switch status {
case .authorizedWhenInUse:
locationManager.startUpdatingLocation()
locationManager.startUpdatingHeading()
case .denied:
UserLocation.shared.location = nil
locationManager.requestWhenInUseAuthorization()
case .notDetermined:
UserLocation.shared.location = nil
locationManager.requestWhenInUseAuthorization()
default:
break
}
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
print("Location Manager Error -> \(String(describing: error.localizedDescription))")
}
}
Add this class to hold the users location
class UserLocation {
static let shared = UserLocation()
var location: CLLocation?
}
In the Info.plist add this key and value
<key>NSLocationWhenInUseUsageDescription</key>
<string>Location Usage Description Shown To The User</string>

Answer 2

I don't know if you added the two required strings into the plist project.
NSLocationWhenInUseUsageDescription
NSLocationAlwaysUsageDescription