CLLocationManager返回空值

Question

我想要使用CLLocationManager以两个坐标的形式返回用户位置。

• 我想我有正确的授权（authorizedWhenInUse），但是当它会得到实际位置返回nil。

• 我也有NSLocationWhenInUseUsageDescription添加到我的plist

  import UIKit 
  import CoreLocation  
  class ViewController: UIViewController, CLLocationManagerDelegate { 
  // Create an instance of the CLLocationManager 
      var locManager = CLLocationManager() 
  
  // View did load function (run things inside of here) 
  override func viewDidLoad() { 
      super.viewDidLoad() 
      // Do any additional setup after loading the view, typically from a nib. 
  
      locManager.delegate = self 
      locManager.desiredAccuracy = kCLLocationAccuracyBest 
  
      // Check authorizationStatus 
      let authorizationStatus = CLLocationManager.authorizationStatus() 
      // List out all responses 
      switch authorizationStatus { 
      case .AuthorizedAlways: 
       println("authorized") 
      case .AuthorizedWhenInUse: 
       println("authorized when in use") 
      case .Denied: 
       println("denied") 
      case .NotDetermined: 
       println("not determined") 
      case .Restricted: 
       println("restricted") 
      } 
  
      // Get the location 
      locManager.startUpdatingLocation() 
  
      if(CLLocationManager.authorizationStatus() == CLAuthorizationStatus.AuthorizedWhenInUse){ 
       // Extract the location from CLLocationManager 
       let userLocation = locManager.location 
  
       // Check to see if it is nil 
       if userLocation != nil { 
        println("location is \(userLocation)") 
       } else { 
        println("location is nil") 
       } 
      } else { 
       println("not authorized") 
      } 
  
      } 
  } 
  
  override func didReceiveMemoryWarning() { 
      super.didReceiveMemoryWarning() 
      // Dispose of any resources that can be recreated. 
  } 
  

  }

Answer 1

SDK中CLLocationManager.h头文件提供了有关 “.location” 属性这个提示：

Discussion: 
*  The last location received. Will be nil until a location has been received. 

要做的最好的事情是执行：

optional func locationManager(_ manager: CLLocationManager, 
     didUpdateLocations locations: [CLLocation]) 

委托方法，让你的位置离开那里，它被调用时，该设备的GPS解决，其中手机。

喜欢的东西：

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

    let userLocation = manager.location 

    print("location = \(userLocation.latitude) \(userLocation.longitude)") 

    }