ios - 无法使用带有 NSLocationWhenInUseUsageDescription 的 Swift 和 iOS8 获取位置服务

Question

我做了很多关于如何让定位服务在 Swift 和 iOS8 上正常工作的研究。我知道有很多主题描述了常见的陷阱，但对我没有任何帮助。

这是我的 View Controller 的代码:

import UIKit

class ViewController: UIViewController, GMSMapViewDelegate, CLLocationManagerDelegate {

//#2
var gmaps: GMSMapView?

let locationManager = CLLocationManager()

required init(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
}

override func viewDidLoad() {
    super.viewDidLoad()

    var target: CLLocationCoordinate2D = CLLocationCoordinate2D(latitude: 51.6, longitude: 17.2)
    var camera: GMSCameraPosition = GMSCameraPosition(target: target, zoom: 6, bearing: 0, viewingAngle: 0)

    gmaps = GMSMapView(frame: CGRectMake(0, 0, self.view.bounds.width, self.view.bounds.height))
    if let map = gmaps? {
        map.camera = camera
        map.delegate = self

        self.view.addSubview(gmaps!)

        map.animateToZoom(10)
    }

    locationManager.delegate = self
    locationManager.desiredAccuracy = kCLLocationAccuracyBest

    locationManager.requestWhenInUseAuthorization()
    locationManager.startUpdatingLocation()
}

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

func locationManager(manager: CLLocationManager!, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
    if status == .AuthorizedWhenInUse {
        locationManager.startUpdatingLocation()

        if let map = gmaps? {
            map.myLocationEnabled = true
            map.settings.myLocationButton = true
        }
    }
}

func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
    if let location = locations.first as? CLLocation {
        if let map = gmaps? {
            map.camera = GMSCameraPosition(target: location.coordinate, zoom: 15, bearing: 0, viewingAngle: 0)

            locationManager.stopUpdatingLocation()
        }
    }
}
}

在我的信息 plist 中，我设置了键 NSLocationAlwaysUsageDescription、NSLocationWhenInUseUsageDescription 和 Privacy - Location Usage Description。我还将 CoreLocation.framework 添加到我的链接框架和库中。

但我仍然没有收到询问用户位置权限的弹出窗口。没有错误，但也没有其他事情发生:-(

Answer 1

您应该检查是否已为您的应用授予权限，如果是，请删除该权限(iOS 设置应用、隐私)。

另一个建议是从模拟器/设备上完全卸载该应用。

这是来 self 的 appDelegate 的代码片段，它使用 requestAlwaysAuthorization 但这应该不会有什么不同:

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {
    // intialize locationManager
    locationManager.delegate = self
    locationManager.activityType = CLActivityType.Fitness
    locationManager.distanceFilter = 10   // 10m
    locationManager.requestAlwaysAuthorization()

    // get current location
    if CLLocationManager.authorizationStatus() == CLAuthorizationStatus.Authorized {
        locationManager.startUpdatingLocation()
    }
}

func locationManager(manager: CLLocationManager!, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
    if status == .Authorized {
        locationManager.startUpdatingLocation()
    }
}

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

这是在我的 Info.plist 中:

<key>NSLocationAlwaysUsageDescription</key>
<string>No tracking without your permission</string>