Distance from Current Location to Annotation. (Firebase) - swift

Question

I want to have a the distance from my Currentlocation to a annotation that's in the FireData Base. I tried to make it word but i can't ;(. I would like to have the distance between the two locations in a var. I hope you guys can help me.
func reload(){
//get data
Database.database().reference().child("Rollerbanken").observe(.value, with: { (snapshot) in
for item in snapshot.children{
if let value = snapshot.value as? Dictionary<String, Any> {
for key in value.keys {
if let itemDict = value[key] as? Dictionary<String, AnyObject> {
let annotation = MKPointAnnotation()
annotation.title = itemDict["TypeControle"] as! String
let tijd = itemDict["Tijd"] as! String
annotation.subtitle = "Geplaatst om \(tijd)"
let getLatitude = itemDict["Latitude"] as? String
let getLongitude = itemDict["Longitude"] as? String
if let lat = getLatitude, let long = getLongitude {
annotation.coordinate = CLLocationCoordinate2D(latitude: Double(lat)!, longitude: Double(long)!)
self.map.addAnnotation(annotation)
let directionRequest = MKDirectionsRequest()
directionRequest.source = MKMapItem.forCurrentLocation()
if #available(iOS 10.0, *) {
directionRequest.destination = MKMapItem(placemark: MKPlacemark.init(coordinate: CLLocationCoordinate2DMake(Double(lat)!, Double(long)!)))
} else {
// Fallback on earlier versions
}
directionRequest.transportType = .walking
let direction = MKDirections(request: directionRequest)
direction.calculate(completionHandler: { (response, error) in
if error != nil {
print("Error while build route")
} else {
let route = response?.routes.last
let distance = route?.distance
print(distance)
}
})
}
}
}
}
}
})
}
Here is my Structure:

Answer 1

Try to use this code. Don't forget to enable your current location on map
let directionRequest = MKDirectionsRequest()
directionRequest.source = MKMapItem.forCurrentLocation()
directionRequest.destination = MKMapItem(placemark: MKPlacemark.init(coordinate: CLLocationCoordinate2DMake(YOURPOINTLATITUDE, YOURPOINTLONGITUDE)))
directionRequest.transportType = .walking
let direction = MKDirections(request: directionRequest)
direction.calculate(completionHandler: { (response, error) in
if error != nil {
print("Error while build route")
} else {
let route = response?.routes.last
let distance = route?.distance

Answer 2

I have used similar function, NOTE this was my function therefore it has rider and driver.. however you can change it to use annotation and location from firebase.
if let rideRequestDictionary = snapshot.value as? [String:AnyObject] {
// Getting the rider location and email
if let email = rideRequestDictionary["email"] as? String {
if let lat = rideRequestDictionary["lat"] as? Double{
if let lon = rideRequestDictionary["lon"] as? Double{
// Getting the Driver location and email
let driverCLLocation = CLLocation(latitude: driverLocation.latitude, longitude: driverLocation.longitude)
let riderCLLocation = CLLocation(latitude: lat, longitude: lon)
// getting the distance between the two people
let distance = driverCLLocation.distance(from: riderCLLocation) / 1000
// rounding the distances
let roundedDistance = round(distance * 100) / 100
// putting the rounded distance and email in label
cell.textLabel?.text = "\(email) - \(roundedDistance)km away"
}
}
}