My intention is to find user location when he click on a button.
After some research I come up with 3 ways/methods to do that.
In each case, after determing the location, I show it on he map and print the coordinates ( latitude and longitude).
All 3 cases showed bellow work. But I can not figure out which one is the best/correct/fast.
THE 3 METHODS:
1) Method 1:
- using requestLocation()
- problem: it takes about 10 seconds to show location (quite slow)
2) Method 2 (could this be the best?)
- using CLLocationManagerDelegate (didUpdateLocations)
3) Method 3 (a little bit strange, but it works)
- using CLLocationManager().location?.coordinate
CODE:
1) Method 1:
import UIKit
import CoreLocation
import MapKit
class location1: UIViewController {
let manager = CLLocationManager()
@IBOutlet weak var Map: MKMapView!
@IBOutlet weak var lbl_lat: UILabel!
@IBOutlet weak var lbl_long: UILabel!
@IBAction func btn_GetLocation(_ sender: Any) {
manager.requestLocation()//get Location one time
}
override func viewDidLoad() {
super.viewDidLoad()
manager.requestAlwaysAuthorization()
manager.requestWhenInUseAuthorization()
if CLLocationManager.locationServicesEnabled(){
manager.delegate = self
manager.desiredAccuracy = kCLLocationAccuracyBest
}else{
print ("Err GPS")
}
}
}
extension location1: CLLocationManagerDelegate{
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
if let location = locations.first {
print("Found user's location: \(location)", "lat =", location.coordinate.latitude," long = ",location.coordinate.longitude)
lbl_lat.text = "My Lat:" + String(location.coordinate.latitude)
lbl_long.text = "My Long:" + String(location.coordinate.longitude)
let span = MKCoordinateSpanMake(0.0005, 0.0005)
let mylocation = CLLocationCoordinate2DMake(location.coordinate.latitude, location.coordinate.longitude)
let region = MKCoordinateRegionMake(mylocation, span)
Map.setRegion(region, animated: true)
//marker
let marker1 = MKPointAnnotation()
marker1.coordinate = CLLocationCoordinate2DMake(location.coordinate.latitude, location.coordinate.longitude)
marker1.title = "My Position"
Map.addAnnotation(marker1)
}
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
print("Failed to find user's location: \(error.localizedDescription)")
}
}2) Method 2
import UIKit
import CoreLocation
import MapKit
class locatia2: UIViewController {
@IBOutlet weak var Map: MKMapView!
let manager = CLLocationManager()
@IBOutlet weak var lbl_My_Longitude: UILabel!
@IBOutlet weak var lbl_My_Latitude: UILabel!
@IBAction func btn_get_my_location(_ sender: Any) {
manager.startUpdatingLocation()
}
override func viewDidLoad() {
super.viewDidLoad()
manager.requestAlwaysAuthorization()
manager.requestWhenInUseAuthorization()
if CLLocationManager.locationServicesEnabled(){
manager.delegate = self
manager.desiredAccuracy = kCLLocationAccuracyBest
}else{
print ("ErR GPS")
}
}
}
extension locatia2: CLLocationManagerDelegate{
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
if let location = locations.last {
print("Found user's location: \(location)", "lat =", location.coordinate.latitude," long = ",location.coordinate.longitude)
lbl_My_Latitude.text = "My Lat:" + String(location.coordinate.latitude)
lbl_My_Longitude.text = "My Long:" + String(location.coordinate.longitude)
let span = MKCoordinateSpanMake(0.0005, 0.0005)
let mylocation = CLLocationCoordinate2DMake(location.coordinate.latitude, location.coordinate.longitude)
let region = MKCoordinateRegionMake(mylocation, span)
Map.setRegion(region, animated: true)
//pun un marker
let marker1 = MKPointAnnotation()
marker1.coordinate = CLLocationCoordinate2DMake(location.coordinate.latitude, location.coordinate.longitude)
marker1.title = "My Position"
Map.addAnnotation(marker1)
//close updating location
manager.stopUpdatingLocation()
}
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
print("Failed to find user's location: \(error.localizedDescription)")
manager.stopUpdatingLocation()
}
}3) Method 3
import UIKit
import CoreLocation
import MapKit
class location3: UIViewController {
@IBOutlet weak var lbl_long: UILabel!
@IBOutlet weak var lbl_lat: UILabel!
@IBOutlet weak var Map: MKMapView!
let manager = CLLocationManager()
@IBAction func btn_getPosition(_ sender: Any) {
let SURSA = manager.location?.coordinate
if let long = SURSA?.longitude{
let long_sir = String(long)
if let lat = SURSA?.latitude{
let lat_sir = String(lat)
lbl_lat.text = "My Lat: " + long_sir
lbl_long.text = "My Long:" + lat_sir
let span = MKCoordinateSpanMake(0.0005, 0.0005)
let mylocation = CLLocationCoordinate2DMake(SURSA!.latitude, SURSA!.longitude)
let region = MKCoordinateRegionMake(mylocation, span)
Map.setRegion(region, animated: true)
// marker
let marker1 = MKPointAnnotation()
marker1.coordinate = CLLocationCoordinate2DMake(SURSA!.latitude, SURSA!.longitude)
marker1.title = "My position"
Map.addAnnotation(marker1)
}
}
}
override func viewDidLoad() {
super.viewDidLoad()
manager.requestAlwaysAuthorization()
manager.requestWhenInUseAuthorization()
if CLLocationManager.locationServicesEnabled(){
manager.delegate = self
manager.desiredAccuracy = kCLLocationAccuracyBest
}else{
print ("ErR GPS")
}
}
}
extension location3: CLLocationManagerDelegate{
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
print("Failed to find user's location: \(error.localizedDescription)")
manager.stopUpdatingLocation()
}
}Thanks in advance
