Question

我正在尝试获取在模拟器上运行的用户位置，我获得了默认地址，但至少我知道它正在运行。我试图在我的设备上运行它，但是没有用。在写这个问题之前，我试图寻找一种解决方案，但是找不到适合我的东西。这是我的代码：

LocationManager：

class LocationManager: NSObject, CLLocationManagerDelegate {

static let shared = LocationManager()
var locationManager: CLLocationManager!
var geoCoder = CLGeocoder()

var callBack:((String)->())?

override init() {
    super.init()
    locationManager = CLLocationManager()
    locationManager.delegate = self
    locationManager.desiredAccuracy = kCLLocationAccuracyBest
    locationManager.activityType = .other
    locationManager.requestWhenInUseAuthorization()
}

func checkIfLocationIsEnabled() -> Bool{
    return CLLocationManager.locationServicesEnabled()
}

func getUserLocation(){
    locationManager.requestLocation()
}

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]){
    let userLocation: CLLocation = locations[0] as CLLocation
    geoCoder.reverseGeocodeLocation(userLocation) { (placemarks, err) in
        if let place = placemarks?.last{
            self.callBack?(place.name!)
        }
    }
}

func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
    print(error)
}
}

这是我的getLocation（只需调用getUserLocation并设置我从回调中获取的地址）：

    func getLocation(_ label: UILabel) -> String{
    guard let comment = self.mView.addCommentTextField.text else { return ""}
    LocationManager.shared.getUserLocation()
    var addressString = ""
    LocationManager.shared.callBack = { address in
        DispatchQueue.main.async {
            label.text = "\(address), \(comment)"
            addressString = address
        }
    }
    return addressString
}

这就是我所谓的getLocation：

 self.mView.inLabel.isHidden = false
        self.getLocation(self.mView.inLabel)

Answer 1

实际上仔细查看您的代码，发现您正在询问这样的权限：

locationManager.requestWhenInUseAuthorization()

但是requestWhenInUseAuthorization()是异步调用，您需要先等待用户响应，然后才能使用任何位置服务：

当前授权状态为CLAuthorizationStatus.notDetermined时，此方法异步运行，并提示用户向应用授予使用位置服务的权限。
（source）

还要注意，它仅在状态为notDetermined时才有效。任何其他状态都不会触发它。所以首先：

if CLLocationManager.authorizationStatus() == .authorizedWhenInUse {
    // already authorized, can use location services right away
}
if CLLocationManager.authorizationStatus() == .notDetermined {
    locationManager.requestWhenInUseAuthorization()
    // wait, don't call any location-related functions until you get a response
}

如果将位置权限设置为其他任何权限，也无济于事。然后您的课程已经是CLLocationManagerDelegate，所以：

func locationManager(_ manager: CLLocationManager,
                     didChangeAuthorization status: CLAuthorizationStatus) {
    // do something with new status, e.g.
    if status == .authorizedWhenInUse {
        // good, now you can start accessing location data
    }
    // otherwise, you can't

无法在真实设备上获取位置

1 个答案: