应用程序不会更新我的位置

Question

我试图启动简单的地理位置应用程序，但它的构建没有错误，它不会更新我的位置数据，因为它应该是。我使用SWIFT 3，Xcode中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() 
    } 




} 

我甚至无法调试期间赶上错误，因为当我尝试写打印控制台有什么也不会发生。

Answer 1

您的问题驻留在模拟器上测试基于位置的代码。虽然这是可能的，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，它的本性来说，它是一个模拟器，因此，你可以模拟您的位置。这很容易，只需打开模拟器并导航到Debug> Location，如下图所示。

苹果给我们带来了几个内置的选择，但他们都在美国，所以我想用一个自定义。您只需点击自定义并输入一个坐标。然后重新安装您的应用程序并重新确定您的位置，它应该按预期工作。让我知道如果它不是。