CODEWITHSUNDEEP
iosswiftcllocation
Chris
Chris

Reputation: 8020

CLLocation 'coordinate' is unavailable

I have an issue using getting lat and long from a CLLocation object.

The weird thing is, up until yesterday I was able to retrieve the lat and long by doing: 

func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {

    var location: AnyObject? = locations.last

    if let location: AnyObject = location {
        //The println illustrates how I would retrieve the lat and long, i.e. by calling
        //location.coordinate.latitude.

        println(location.coordinate.latitude)

        locationDelegate?.updateLabels(location)
        self.locationsArray.append(location)
    }
}

This has now stopped working and it throws me the following compiler error:

enter image description here

If i remove the .coordinate call and call .latitude directly on the location object, it just returns nil. I'm a bit lost as to whats going on here...

if I println(location) i get the following output:

<+56.92239472,+1.47020887> +/- 5.00m (speed -1.00 mps / course -1.00) @ 10/11/14, 2:37:59 PM British Summer Time

Can anybody help me understand whats going on and how to retrieve the lat and long again?

Upvotes: 0

Views: 932

Answers (3)

Arun Panneerselvam
Arun Panneerselvam

Reputation: 2335

The best way to implement this method is to define the coordinates. (i assume you trying to get the current location)

    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {

            if !isCurrentLocation {
                return
            }

            isCurrentLocation = false

            let location = locations.last

// here define the center variable to hold the coordinates for reuse!
            let center = CLLocationCoordinate2D(latitude: location!.coordinate.latitude, longitude: location!.coordinate.longitude)
            let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: DesiredLocation.latitude, longitudeDelta: DesiredLocation.longitude))


            self.mapView.setRegion(region, animated: true)


    }

And its all set!

Upvotes: 0

Alice Isabelle
Alice Isabelle

Reputation: 618

I had this problem. The proper solution is to cast the location objects to CLLocation before you dereference the coordinate property. The following code should work, although I haven't actually tested it. Additionally, there may be a more elegant way to do the cast; I'm still learning Swift myself.

func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {

   var location: AnyObject? = locations.last

   if let location: AnyObject = location {
       //The println illustrates how I would retrieve the lat and long, i.e. by calling
       //location.coordinate.latitude.
       var loc = location as CLLocation
       println(loc.coordinate.latitude)

       locationDelegate?.updateLabels(loc)
       self.locationsArray.append(loc)
   }
}

Upvotes: 0

Chris
Chris

Reputation: 8020

Using the func locationManager(manager: CLLocationManager!, didUpdateToLocation newLocation: CLLocation!, fromLocation oldLocation: CLLocation!)instead of the above delegate method and then calling newLocation.coordinate.latitude seems to work.

Upvotes: 1

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