ios - 检测 mapItemForCurrentLocation 何时无法找到您的设备

Question

在获取 map 的当前位置时，我不知道如何测试是否成功。

let source = MKMapItem.mapItemForCurrentLocation()
// returns an object with:
//   isCurrentLocation = 1
//   name="Unknown location"

我可以测试 source.name == "Unknown location"但这会很糟糕， 坏 .

那么......在这种情况下我如何检测失败/零？

Answer 1

像这样的东西？

class ViewController: UIViewController, MKMapViewDelegate, CLLocationManagerDelegate {

    @IBOutlet weak var mapView: MKMapView!
    var locationManager = CLLocationManager()

在 viewDidLoad 中:

locationManager = CLLocationManager()
        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        locationManager.requestWhenInUseAuthorization()
        locationManager.startUpdatingLocation()

...

代表们

func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {

        if (!locations.isEmpty)
        {

            let myLocation  = locations[0] as! CLLocation

            mapView.setRegion(MKCoordinateRegionMake(CLLocationCoordinate2DMake(myLocation.coordinate.latitude, myLocation.coordinate.longitude),
                MKCoordinateSpanMake(0.06, 0.06)), animated: true)
        }

    }