how to get user latitude and longitude in a label by clicking uibutton - ios

Question

I am trying to get user current location latitude and longitude by using reverse CLgeocoding.but,i think methods doesn't called. i am not getting any result in console at least.If any one helps me to do this,would be great.Thank in advance.
import UIKit
import CoreLocation
class ViewController: UIViewController,CLLocationManagerDelegate {
#IBOutlet weak var lbl2: UILabel!
#IBOutlet weak var lbl1: UILabel!
var str1: Double?
var str2: Double?
var locationManager:CLLocationManager!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
determineMyCurrentLocation()
}
func determineMyCurrentLocation() {
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestAlwaysAuthorization()
if CLLocationManager.locationServicesEnabled() {
locationManager.startUpdatingLocation()
//locationManager.startUpdatingHeading()
}
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
CLGeocoder().reverseGeocodeLocation(manager.location!, completionHandler: {(placemarks, error) -> Void in
if (error != nil) {
print("ERROR:" + error!.localizedDescription)
return
}
if (placemarks?.count)! > 0 {
let pm = placemarks![0] as CLPlacemark
self.displayLocationInfo(placemark: pm)
} else {
print("Error with data")
}
})
}
func displayLocationInfo(placemark: CLPlacemark) {
// self.locationManager.stopUpdatingLocation()
print(placemark.locality)
print(placemark.postalCode)
print(placemark.administrativeArea)
print(placemark.country)
print(placemark.location)
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error)
{
print("Error \(error)")
}
#IBAction func currentadd(_ sender: Any) {
}

Answer 1

First make sure you have added one of the keys in your Info.plist
NSLocationAlwaysUsageDescription or NSLocationWhenInUseUsageDescription.
Second you need to call determineMyCurrentLocation method in your viewDidLoad or viewDidAappear. You can also call determineMyCurrentLocation from any button or event according to your need.
Edit
One more thing i would like to suggest is you should call manager.stopUpdatingLocation() in your didUpdateLocations if you don't want to use location service constantly.
Updated method
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
if let managerLocation = manager.location{
CLGeocoder().reverseGeocodeLocation(managerLocation) { (placemarks, error) in
if let locations = placemarks ,let location = locations.first {
self.displayLocationInfo(placemark: location)
}else if let error = error{
print("ERROR:" + error.localizedDescription)
}
}
}
}