Question

我正在尝试在我的应用程序中使用位置管理器。我设置了我在很多帖子和示例中看到的代码，一切正常，我让位置管理器显示模拟器中设置的当前位置。然后我在模拟器中更改位置，我的应用程序获取新位置。

然后我重新启动我的计算机，然后重新启动我的应用程序，但位置管理器停止工作。我尝试使用addObserver（）更改代码以使用didUpdateLocations，有时我设法重新启动位置管理器才能工作。但是当我重新启动机器时它再次停止工作。我尝试重置模拟器并再次授权应用程序获取位置更新，但没有成功。在所有情况下，我的应用程序打印出它有权获取位置更新，但它不起作用。我也尝试清理应用程序并重建它，但没有成功。以下是我使用的代码的两个版本。

使用addObserver的代码

class TViewController: UIViewController, GMSMapViewDelegate, CLLocationManagerDelegate {

var myLocation: CLLocation?
var locationManager = CLLocationManager()

@IBOutlet weak var mapView: GMSMapView!

override func viewDidLoad() {
    super.viewDidLoad()

    locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    locationManager.distanceFilter = kCLDistanceFilterNone;
    locationManager.delegate = self
    locationManager.requestWhenInUseAuthorization()

    mapView!.settings.myLocationButton = true
}

// get updates of myLocation
override func observeValueForKeyPath(keyPath: String?,
                                     ofObject object: AnyObject?,
                                              change: [String : AnyObject]?,
                                              context: UnsafeMutablePointer<Void>)
{
    myLocation = change![NSKeyValueChangeNewKey] as? CLLocation
    print("in newlocation =  \(myLocation)")
}

func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
    if status == CLAuthorizationStatus.AuthorizedWhenInUse {
        print("in myLocation is authorized")
        locationManager.startUpdatingLocation()
        mapView!.myLocationEnabled = true
        mapView!.addObserver(self, forKeyPath: "myLocation", options: NSKeyValueObservingOptions.New, context: nil)
    }
}
}

使用didUpdateLocations的代码

extension TViewController: CLLocationManagerDelegate {
func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
    if status == .AuthorizedWhenInUse {
        print("in myLocation extension is authorized")
        isLocationAvailable = true
        locationManager.startUpdatingLocation()
        mapView.myLocationEnabled = true
        mapView.settings.myLocationButton = true
    }
}

func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
            myLocation = locations.first
            print("in newlocation extension =  \(myLocation)")
            mapView.camera = GMSCameraPosition(target: myLocation!.coordinate, zoom: 15, bearing: 0, viewingAngle: 0)
}

class TViewController: UIViewController, GMSMapViewDelegate {

var myLocation: CLLocation?
var locationManager = CLLocationManager()

@IBOutlet weak var mapView: GMSMapView!

override func viewDidLoad() {
    super.viewDidLoad()

    locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    locationManager.distanceFilter = kCLDistanceFilterNone;
    locationManager.delegate = self
    locationManager.requestWhenInUseAuthorization()

    mapView!.settings.myLocationButton = true
}

重启后，位置管理器停止工作swift ios

0 个答案: