Swift - map returns to starting point

Question

I have a map in my app but when i move the map around, the second I let go, it returns to the starting point. I do not want this to happen..

My ViewController looks like this atm:

import UIKit
import MapKit
import CoreLocation

class ViewController: UIViewController, CLLocationManagerDelegate {

@IBOutlet weak var map: MKMapView!
var locationManager: CLLocationManager!

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

    if (CLLocationManager.locationServicesEnabled())
    {
        locationManager = CLLocationManager()
        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        locationManager.requestAlwaysAuthorization()
        locationManager.startUpdatingLocation()
    }
}

func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
    let location = locations.last as CLLocation

    let center = CLLocationCoordinate2D(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)
    let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01))

    self.map.setRegion(region, animated: true)
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}
}

Answer 1

CLLocationManager 's startUpdatingLocation sends updates to the User's location to locationManager:didUpdateLocations: .

Calling this method causes the location manager to obtain an initial location fix (which may take several seconds) and notify your delegate by calling its locationManager:didUpdateLocations: method.

So then in locationManager:didUpdateLocations: the region you're moving the map to with setRegion:animated: is the location that just got sent, ie, the User's location.

Answer 2

You set the region of your mapView in the didUpdateLocations delegate method.

Once you start to call startUpdatingLocation() , it will start to keep retrieving your location coordinate, and your didUpdateLocations method will be called, and your mapView will be update by the setRegion() in your method.

You can change the value of location manager's distanceFilter to a bigger number, so it will update less frequently. By default, kCLDistanceFilterNone is used, so your didUpdateLocations will be called of all movements.

Answer 3

所以我似乎只需将locationManager.stopUpdatingLocation()添加到didUpdateLocations函数中