didUpdateLocations never called

问题

I'm trying to get the user's location. To do so I have set the following property in the info.plist :

I have also added the following code in my viewDidLoad method as well as the function below. The problem is that the locationManager(manager, didUpdate....) function never gets called, I also never get prompted for permission to access location, even though I have removed and installed the app again. I am testing this on my iPad, not on the simulator. The didFailWithError function never gets called either.

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



func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    print("UPDATING")
    let locValue:CLLocationCoordinate2D = manager.location!.coordinate
    let latitude = locValue.latitude
    let longitude = locValue.longitude
    latitudeText = "\(latitude)"
    longitudeText = "\(longitude)"
    if let a = latitudeText, b = longitudeText {
        print(a)
        print(b)
        self.locationManager.stopUpdatingLocation()
        if (userAlreadyExist()) {
            dispatch_async(dispatch_get_main_queue(), {
                //self.performSegueWithIdentifier("segueWhenLoggedIn", sender: self)
                self.performSegueWithIdentifier("showCamera", sender: self)
                // self.performSegueWithIdentifier("showTabBarController", sender: self)
            })

        }
        else {
            dispatch_async(dispatch_get_main_queue(), {
                self.performSegueWithIdentifier("segueWhenLoggedOut", sender: self)
            })
        }
    }


}

func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
    print(error.localizedDescription)
}

EDIT :

I have added the following snippet of code :

if CLLocationManager.locationServicesEnabled() {
        print("yes")
    }
    else {
        print("no")
    }

it returns yes. I have also checked on my device, locationServices are enabled, the app is listed there, however all the other apps have "While Using", "Never" or "Always" written next to them, mine doesn't have anything written.

回答1:

where do you start the location update ? for example:

//location manager
    lazy var locationManager: CLLocationManager = {
        var _locationManager = CLLocationManager()
        _locationManager.delegate = self
        _locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
        _locationManager.activityType = .AutomotiveNavigation
        _locationManager.distanceFilter = 10.0  // Movement threshold for new events
        _locationManager.allowsBackgroundLocationUpdates = true // allow in background

        return _locationManager
    }()


    if CLLocationManager.locationServicesEnabled() {
                locationManager.startUpdatingLocation() // start location manager

            }

here is a working conroller code: also important to to set up Custom iOS Target Properties.

Add these two lines to the Info.plist:

NSLocationWhenInUseUsageDescription

NSLocationAlwaysUsageDescription

//
//  ViewController.swift
//  LocationTest2


import UIKit
import CoreLocation

class ViewController: UIViewController {

    //location manager
    lazy var locationManager: CLLocationManager = {
        var _locationManager = CLLocationManager()
        _locationManager.delegate = self
        _locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
        _locationManager.activityType = .AutomotiveNavigation
        _locationManager.distanceFilter = 10.0  // Movement threshold for new events
      //  _locationManager.allowsBackgroundLocationUpdates = true // allow in background

        return _locationManager
    }()

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    override func viewWillAppear(animated: Bool) {
        super.viewWillAppear(animated)

        //allow location use
        locationManager.requestAlwaysAuthorization()

        print("did load")
        print(locationManager)

        //get current user location for startup
       // if CLLocationManager.locationServicesEnabled() {
            locationManager.startUpdatingLocation()
       // }
    }
}


// MARK: - CLLocationManagerDelegate
extension ViewController: CLLocationManagerDelegate {

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

        for location in locations {

            print("**********************")
            print("Long \(location.coordinate.longitude)")
            print("Lati \(location.coordinate.latitude)")
            print("Alt \(location.altitude)")
            print("Sped \(location.speed)")
            print("Accu \(location.horizontalAccuracy)")

            print("**********************")


        }
    }

}

回答2:

for me worked:

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    print("locationManager update")
}

instead of this

private func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    print("locationManager update")
}

回答3:

Also make sure you have set the custom location to simulator as by default it will be None ... In the simulator go to Debug -> Location-> .

It should also be noted that locationManager:didFailWithError: will run if the location is not set in the simulator, as you'd expect.

回答4:

You should call startUpdatingLocation() inside the didDetermineState delegate method

  if CLLocationManager.authorizationStatus() != .AuthorizedWhenInUse {
                locationManager.requestWhenInUseAuthorization()
            }else{
                locationManager.startUpdatingLocation()
    }

//later

func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
        switch status {
        case .AuthorizedWhenInUse:
            manager.startUpdatingLocation()
            break
        case .AuthorizedAlways:
            manager.startUpdatingLocation()
            break
        case .Denied:
            //handle denied
            break
        case .NotDetermined:
             manager.requestWhenInUseAuthorization()
           break
        default:
            break
        }
    }

回答5:

A very subtle cause for this bug in Swift code. Don't define the delegate call didUpdateLocations as private or fileprivate. The location manager won't be able to find or call it if you do.

Good:

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

Bad:

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

回答6:

I looked for answers high and low. This is the only thing that worked for me: Change the func for didUpdateToLocation to:

func locationManager(_: CLLocationManager, didUpdateToLocation newLocation: CLLocation!,fromLocation oldLocation: CLLocation!) {
}

Note the subtle change of "as _: CLLocationManager", instead of "manager: CLLocationManager".

来源：https://stackoverflow.com/questions/37683139/didupdatelocations-never-called