ios - CLLocation 管理器使用默认位置而不更新实际位置

Question

所以我不知道发生了什么。我的代码运行得非常好，然后我在 Storyboard中工作了一会儿，突然我开始收到错误消息，即我的 CLLocation 在解包时始终为 nil。我做了我能想到的或在网上阅读的所有内容。

• 添加到.plist
• 在不同的地方复制代码
• 将 didUpdateLocations 移动到 viewDidLoad 中

如果我将方案更新为具有默认位置，那么它只会一直使用默认位置，并且永远不会更新我的当前位置，当我在实际设备上尝试时也是如此，但如果我将其保留为无，则代表调用错误 didFailWithError 的方法表明返回值为 nil。我在这里失去了它。请帮忙。

override func viewDidLoad() {
        super.viewDidLoad()

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

      }  


 func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
        print("In the location, seems we got some shit --> didFailWithError: \(error.description)")

        }
    func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {

        let locValue : CLLocationCoordinate2D = locationManager.location!.coordinate
        let geoFire = GeoFire(firebaseRef: self.geofireRef.child("Posts"))

        let center = CLLocation(latitude: locValue.latitude, longitude: locValue.longitude)

        let circleQuery = geoFire.queryAtLocation(center, withRadius: 10)

        circleQuery.observeEventType(.KeyEntered, withBlock: { (key: String!, location: CLLocation!) in
            print("Key '\(key)' entered the search area and is at location '\(location)'")
        })

        self.locationManager.stopUpdatingLocation()

    }

Answer 1

运行以下代码:

import UIKit
import CoreLocation
import MapKit

class ViewController: UIViewController, CLLocationManagerDelegate, MKMapViewDelegate {
    var locationManager = CLLocationManager()
    var mapView = MKMapView()
    var screenSize = UIScreen.mainScreen().bounds

    override func viewDidLoad() {
        super.viewDidLoad()

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

        mapView = MKMapView(frame: CGRect(x: 0, y: 0, width: screenSize.width, height: screenSize.height))
        mapView.showsUserLocation = true
        mapView.delegate = self
        view.addSubview(mapView)

        // 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.
    }

    func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
        print("In the location, seems we got some error \(error.description)")
    }

    func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        let locValue : CLLocationCoordinate2D = locationManager.location!.coordinate
        let center = CLLocation(latitude: locValue.latitude, longitude: locValue.longitude)
        let region = MKCoordinateRegionMakeWithDistance(locValue, 2000, 2000)
        mapView.setRegion(region, animated: true)
        mapView.centerCoordinate = locValue
        print(center)
    }
}

当然，在 Info.plist 中设置要求，并在调试菜单部分启用位置模拟器:

给我以下输出:

<+37.33756603,-122.04120235> +/- 0.00m (speed -1.00 mps / course -1.00) @ 8/7/16, 11:27:25 PM Central European Summer Time
<+37.33756603,-122.04120235> +/- 0.00m (speed -1.00 mps / course -1.00) @ 8/7/16, 11:27:26 PM Central European Summer Time