I am currently stuck while attempting to figure out how to add a button on my map that will redisplay a user's current location if they stray away from it on the map. At the moment I have the code written below that displays the user's current location.
import UIKit
import MapKit
import CoreLocation
class GameViewController: UIViewController,CLLocationManagerDelegate
{
var lastUserLocation: MKUserLocation?
@IBOutlet weak var Map: MKMapView!
let manager = CLLocationManager()
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let location = locations[0]
let span:MKCoordinateSpan = MKCoordinateSpanMake(0.00775, 0.00775)
let myLocation: CLLocationCoordinate2D = CLLocationCoordinate2DMake(location.coordinate.latitude,location.coordinate.longitude)
let region: MKCoordinateRegion = MKCoordinateRegionMake(myLocation, span)
Map.setRegion(region, animated: true)
self.Map.showsUserLocation = true
manager.stopUpdatingLocation()
}
override func viewDidLoad() {
super.viewDidLoad()
manager.delegate = self
manager.desiredAccuracy = kCLLocationAccuracyBest
manager.requestAlwaysAuthorization()
manager.startUpdatingLocation()
}
@IBAction func refLocation(_ sender: Any) {
print("click")
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}
What I am unsure of, is what code to put inside of the @IBAction function that will allow the map to re-center to the user's current location if they stray from it while looking elsewhere.
For that you can call again startUpdatingLocation
method of CLLocationManager
on your Button
action.
To get the the correct current location of user you need to access the last
object from the location
array in didUpdateLocations
method.
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
//Access the last object from locations to get perfect current location
if let location = locations.last {
let span = MKCoordinateSpanMake(0.00775, 0.00775)
let myLocation = CLLocationCoordinate2DMake(location.coordinate.latitude,location.coordinate.longitude)
let region = MKCoordinateRegionMake(myLocation, span)
Map.setRegion(region, animated: true)
}
self.Map.showsUserLocation = true
manager.stopUpdatingLocation()
}
Now simply call startUpdatingLocation
on your button action.
@IBAction func refLocation(_ sender: Any) {
manager.startUpdatingLocation()
}
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