How to fix Thread 1: Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional value? - ios

Question

I have a problem with the Users Location.
When im trying to build the program it gets this error code: (Thread 1: Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional value)
My code:
import UIKit
import MapKit
class ViewController: UIViewController {
private let locationManager = CLLocationManager()
private var currentCoordinate: CLLocationCoordinate2D?
#IBOutlet weak var mapView: MKMapView!
override func viewDidLoad() {
super.viewDidLoad()
configerLocationServices()
}
private func configerLocationServices() {
locationManager.delegate = self
let status = CLLocationManager.authorizationStatus()
if status == .notDetermined {
locationManager.requestWhenInUseAuthorization()
} else if status == .authorizedAlways || status == .authorizedWhenInUse {
beginLocationUpdates(locationManager: locationManager)
}
}
private func beginLocationUpdates(locationManager: CLLocationManager) {
mapView.showsUserLocation = true //<--- the problem is here
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.startUpdatingLocation()
}
private func zoomToLastestLocation(with coordinate: CLLocationCoordinate2D) {
let zoomRegion = MKCoordinateRegion(center: coordinate, latitudinalMeters: 10000, longitudinalMeters: 10000)
mapView.setRegion(zoomRegion, animated: true)
}
}
extension ViewController: CLLocationManagerDelegate {
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
print("Did get latest Location")
guard let latestLocation = locations.first else { return }
if currentCoordinate == nil {
zoomToLastestLocation(with: latestLocation.coordinate)
}
currentCoordinate = latestLocation.coordinate
}
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
print("The Status changed")
if status == .authorizedAlways || status == .authorizedWhenInUse {
self.beginLocationUpdates(locationManager: manager)
}
}
}
I don't know what im doing wrong, has anyone the solution?
Thank you in advance.

Answer 1

private func setNewLoaction(lat:CLLocationDegrees,long:CLLocationDegrees,markerTitle:String){
let center = CLLocationCoordinate2D(latitude: lat, longitude: long)
let camera = GMSCameraPosition.camera(withLatitude: lat, longitude: long, zoom: 15)
self.googleMapsView?.camera = camera
self.googleMapsView?.isMyLocationEnabled = true
let marker = GMSMarker(position: center)
marker.map = self.googleMapsView
marker.title = markerTitle
locationManager.stopUpdatingLocation()
}
//MARK:- MAP VIEW
private func setUpMap(){
locationManager.delegate = self
locationManager.requestWhenInUseAuthorization()
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.startUpdatingLocation()
self.googleMapsView = GMSMapView (frame: CGRect(x: 0, y: 0, width: self.view.frame.width-30, height: self.mapView.frame.height))
self.googleMapsView?.settings.compassButton = true
self.googleMapsView?.isMyLocationEnabled = true
self.googleMapsView?.settings.myLocationButton = true
self.mapView.addSubview(self.googleMapsView!)
}
I have called setUpMap in ViewDidload and this setLoaction function in GMSAutocompleteViewControllerDelegate =:
func viewController(_ viewController: GMSAutocompleteViewController, didAutocompleteWith place: GMSPlace) {
destinationField.text = place.formattedAddress
destinationLatitude = place.coordinate.latitude
destinationLongitutude = place.coordinate.longitude
setNewLoaction(lat: destinationLatitude!, long: destinationLongitutude!, markerTitle: "Destination Location")
dismiss(animated: true, completion: nil)
}
you can call this anywhere as per you need, do remember to turn on location when asked for permission and if using in simlulator go to Features/Loaction/custom Location

Answer 2

I have now an other code for the same thing it is shorter than the old one.
Here is the code:
import UIKit
import MapKit
import CoreLocation
class ViewController: UIViewController {
#IBOutlet var mapView: MKMapView!
let locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
locationManager.requestWhenInUseAuthorization()
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.distanceFilter = kCLDistanceFilterNone
locationManager.startUpdatingLocation()
mapView.showsUserLocation = true // <--- Crash
}
}
And now it gets the same problem as the old one :(