应用程序不会更新我的位置

Question

我正在尝试启动简单的地理位置应用，但它正在构建没有错误，它不会更新我应该的位置数据。我正在使用swift 3，xcode 8

class CurrentLocationViewController: UIViewController, CLLocationManagerDelegate {

let locationManager = CLLocationManager()
var location: CLLocation?

@IBOutlet weak var messageLabel: UILabel!
@IBOutlet weak var latitudeLabel: UILabel!
@IBOutlet weak var longitudeLabel: UILabel!

@IBOutlet weak var tagButton: UIButton!

@IBAction func getMyLocation(_ sender: Any) {
    let authStatus = CLLocationManager.authorizationStatus()

    if authStatus == .notDetermined {
        locationManager.requestWhenInUseAuthorization()
        return
    }


    if authStatus == .denied || authStatus == .restricted {
        showLocationServicesDeniedAlert()
        return
    }


    locationManager.delegate = self
    locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
    locationManager.startUpdatingLocation()

    updateLabels()



}


    //Showing Alert message if location service is disabled
    func showLocationServicesDeniedAlert() {

        let alert = UIAlertController(title: "Location Services Disabled", message: "Please enable location services for this app in Settings.", preferredStyle: .alert)

        let okAction = UIAlertAction(title: "OK", style: .default, handler: nil)
        alert.addAction(okAction)

        present(alert, animated: true, completion: nil)


    }



    //Updating Labels if Location is tutned on

    func updateLabels() {
        if let location = location {
            latitudeLabel.text = String (format: "%.8f", location.coordinate.latitude)
            longitudeLabel.text = String (format: "%.8f", location.coordinate.longitude)
            tagButton.isHidden = false
            messageLabel.text = ""
        } else {
            latitudeLabel.text = ""
            longitudeLabel.text = ""
            tagButton.isHidden = true
            messageLabel.text = "Tap 'Get My Location' to Start"
        }
    }


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

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

    //MARK: - CLLocationManagerDelegate

    func locationManager (manager: CLLocationManager, didFailWithError error: NSError) {
        print("didFailWithError \(error)")


    }


    func locationManager (manager: CLLocationManager, didUpdateLocations locations : [CLLocation]) {
        let newLocation = locations.last!
        print("didUpdateLocations \(newLocation)")

        location = newLocation
        updateLabels()
     }




}

我甚至无法在调试过程中发现错误，因为当我尝试在控制台中编写print时，没有任何反应。

Answer 1

您的问题在于在模拟器上测试基于位置的代码。虽然有可能，但模拟器无法知道您的位置，因为它无法访问任何GPS硬件。

然而，就其本质而言，它是模拟器，因此您可以 模拟您的位置。这很容易做到，只需打开模拟器并导航到Debug＆gt; Location，如下图所示。

Apple为我们提供了几个内置选项，但它们都在美国，所以我喜欢使用自定义选项。您只需单击自定义并输入坐标即可。然后重新安装您的应用并重新确认您的位置，它应该按预期工作。如果不是，请告诉我。