Question

我正在尝试使用CLLocationManager以两个坐标的形式返回用户位置。

我认为我有正确的授权（authorizedWhenInUse），但在获取实际位置时，它会返回nil。

我的帖子中还添加了NSLocationWhenInUseUsageDescription

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中的CLLocationManager.h头文件提供了有关“.location”属性的有用提示：

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

最好的办法是实施：

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

委托方法并将您的位置从那里取出，当设备的GPS结算到手机所在位置时会调用该位置。

类似的东西：

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

    let userLocation = manager.location

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

  }

CLLocationManager返回Nil值

1 个答案: