Domain=kCLErrorDomain Code=8 when fetching location through zipcode - ios

Question

I'm trying to fetch the the latitude and longitude based on the input parameters postal/city and country code. Below is my code, this works fine if enter City and country name but shows error if I enter zipcode and country code. Below is the code. (Note: Location services and app permissions are enabled)
func getLocationFrom(postalCityCode: String, countryCode: String) -> CLLocation? {
let geocoder = CLGeocoder()
var location: CLLocation?
let address = CNMutablePostalAddress()
address.postalCode = postalCityCode
address.country = countryCode
geocoder.geocodePostalAddress(address, preferredLocale: Locale.current) { (placemarks, error) in
guard error == nil else {
print("Error: \(error!)")
return
}
guard let placemark = placemarks?.first else {
print("Error: placemark is nil")
return
}
guard let coordinate = placemark.location?.coordinate else {
print("Error: coordinate is nil")
return
}
location = CLLocation(latitude: coordinate.latitude, longitude: coordinate.longitude)
print("Found location = \(location)")
}
return location
}
Working input: Shanghai, CN
Failing input: 200040, CN
Edit
Attached updated code as suggested in the answer but still experiencing same issue

Answer 1

Currently, you are using return location before it is set, since geocoder.geocodePostalAddress(...) is an asynchronous function.
That means you need to use a completion handler (for example) to return the location, when it has the results, something like this:
func getLocationFrom(postalCityCode: String, countryCode: String, completion: #escaping ( CLLocation?) -> Void) {
let geocoder = CLGeocoder()
var location: CLLocation?
let address = CNMutablePostalAddress()
address.postalCode = postalCityCode
address.country = countryCode
geocoder.geocodePostalAddress(address, preferredLocale: Locale.current) { (placemarks, error) in
guard error == nil else {
print("Error: \(error!)")
return completion(nil)
}
guard let placemark = placemarks?.first else {
print("Error: placemark is nil")
return completion(nil)
}
guard let coordinate = placemark.location?.coordinate else {
print("Error: coordinate is nil")
return completion(nil)
}
location = CLLocation(latitude: coordinate.latitude, longitude: coordinate.longitude)
print("\n--> Found location = \(location) \n")
completion(location) // <-- here
}
}
Use it like this:
getLocationFrom(postalCityCode: "200040", countryCode: "CN") { location in
print("\n---> location: \(location) \n")
}
EDIT-1
for testing and isolating the issue, try this code in a new SwiftUI project:
struct ContentView: View {
#State var cityLocation = CLLocation()
var body: some View {
Text(cityLocation.description)
.onAppear {
getLocationFrom(postalCityCode: "200040", countryCode: "CN") { location in
print("\n---> location: \(location) \n")
if let theLocation = location {
cityLocation = theLocation
}
}
}
}
func getLocationFrom(postalCityCode: String, countryCode: String, completion: #escaping ( CLLocation?) -> Void) {
let geocoder = CLGeocoder()
var location: CLLocation?
let address = CNMutablePostalAddress()
address.postalCode = postalCityCode
address.country = countryCode
geocoder.geocodePostalAddress(address, preferredLocale: Locale.current) { (placemarks, error) in
guard error == nil else {
print("Error: \(error!)")
return completion(nil)
}
guard let placemark = placemarks?.first else {
print("Error: placemark is nil")
return completion(nil)
}
guard let coordinate = placemark.location?.coordinate else {
print("Error: coordinate is nil")
return completion(nil)
}
location = CLLocation(latitude: coordinate.latitude, longitude: coordinate.longitude)
print("\n--> Found location = \(location) \n")
completion(location)
}
}
}