I'm attempting to use CLGeocoder to return the location of coordinates in a string. My code currently looks like this:
func getPlaceName(latitude: Double, longitude: Double) -> String {
let coordinates = CLLocation(latitude: latitude, longitude: longitude)
var answer = ""
CLGeocoder().reverseGeocodeLocation(coordinates, completionHandler: {(placemarks, error) -> Void in
if (error != nil) {
println("Reverse geocoder failed with an error" + error.localizedDescription)
answer = ""
}
if placemarks.count > 0 {
let pm = placemarks[0] as CLPlacemark
answer = displayLocationInfo(pm)
} else {
println("Problems with the data received from geocoder.")
answer = ""
}
})
return answer
}
func displayLocationInfo(placemark: CLPlacemark?) -> String
{
if let containsPlacemark = placemark
{
let locality = (containsPlacemark.locality != nil) ? containsPlacemark.locality : ""
let postalCode = (containsPlacemark.postalCode != nil) ? containsPlacemark.postalCode : ""
let administrativeArea = (containsPlacemark.administrativeArea != nil) ? containsPlacemark.administrativeArea : ""
let country = (containsPlacemark.country != nil) ? containsPlacemark.country : ""
println(locality)
println(postalCode)
println(administrativeArea)
println(country)
return locality
} else {
return ""
}
}
Everything seems to be working, apart from being able to return the string from getPlaceNames(). I only every get the following returned:
Optional("")
The displayLocationInfo() function seems to work fine, as the println()s come out ok. So I believe that the getPlaceName() function is indeed getting the locality string from displayLocationInfo().
Any ideas? Thanks.
Since reverseGeocodeLocation is an asynchronous function, you need to make your getPlaceName function pass the answer back via a block instead of a return statement. Example:
func getPlaceName(latitude: Double, longitude: Double, completion: (answer: String?) -> Void) {
let coordinates = CLLocation(latitude: latitude, longitude: longitude)
CLGeocoder().reverseGeocodeLocation(coordinates, completionHandler: {(placemarks, error) -> Void in
if (error != nil) {
println("Reverse geocoder failed with an error" + error.localizedDescription)
completion(answer: "")
} else if placemarks.count > 0 {
let pm = placemarks[0] as CLPlacemark
completion(answer: displayLocaitonInfo(pm))
} else {
println("Problems with the data received from geocoder.")
completion(answer: "")
}
})
}