How to get Location user whith CLLocationManager i

问题:

I have this code on my view controller but this not working:

 import UIKit
 import CoreLocation
 class ViewController: UIViewController, CLLocationManagerDelegate {

  var location: CLLocationManager!

 override func viewDidLoad() {
    super.viewDidLoad()

    location=CLLocationManager()
    location.delegate = self
    location.desiredAccuracy=kCLLocationAccuracyBest
    location.startUpdatingLocation()
}

 func locationManager(location:CLLocationManager, didUpdateLocations locations:AnyObject[]) {
    println("locations = \(locations)")
    label1.text = "success"
}

I have the permisions how I read in other post. but I don't obtain never, no println..

Thanks!!

回答1:

first add this two line in plist file

1) NSLocationWhenInUseUsageDescription

2) NSLocationAlwaysUsageDescription

Then this is class working complete implement this

import UIKit 
import CoreLocation

@UIApplicationMain

class AppDelegate: UIResponder, UIApplicationDelegate, CLLocationManagerDelegate {

var window: UIWindow?
var locationManager: CLLocationManager!
var seenError : Bool = false
var locationFixAchieved : Bool = false
var locationStatus : NSString = "Not Started"

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {
    initLocationManager();
    return true
}

// Location Manager helper stuff
func initLocationManager() {
    seenError = false
    locationFixAchieved = false
    locationManager = CLLocationManager()
    locationManager.delegate = self
    locationManager.locationServicesEnabled
    locationManager.desiredAccuracy = kCLLocationAccuracyBest

    locationManager.requestAlwaysAuthorization()
}

// Location Manager Delegate stuff

func locationManager(manager: CLLocationManager!, didFailWithError error: NSError!) {
    locationManager.stopUpdatingLocation()
    if (error) {
        if (seenError == false) {
            seenError = true
           print(error)
        }
    }
}

func locationManager(manager: CLLocationManager!, didUpdateLocations locations: AnyObject[]!) {
    if (locationFixAchieved == false) {
        locationFixAchieved = true
        var locationArray = locations as NSArray
        var locationObj = locationArray.lastObject as CLLocation
        var coord = locationObj.coordinate

        println(coord.latitude)
        println(coord.longitude)
    }
}

func locationManager(manager: CLLocationManager!,
    didChangeAuthorizationStatus status: CLAuthorizationStatus) {
        var shouldIAllow = false

        switch status {
        case CLAuthorizationStatus.Restricted:
            locationStatus = "Restricted Access to location"
        case CLAuthorizationStatus.Denied:
            locationStatus = "User denied access to location"
        case CLAuthorizationStatus.NotDetermined:
            locationStatus = "Status not determined"
        default:
            locationStatus = "Allowed to location Access"
            shouldIAllow = true
        }
        NSNotificationCenter.defaultCenter().postNotificationName("LabelHasbeenUpdated", object: nil)
        if (shouldIAllow == true) {
            NSLog("Location to Allowed")
            // Start location services
            locationManager.startUpdatingLocation()
        } else {
            NSLog("Denied access: \(locationStatus)")
        }
}
}

回答2:

Following are the simple steps for getting user location in Swift 3

1) First add this line in plist file with description

 NSLocationWhenInUseUsageDescription

2) Add CoreLocation.framework in your project(Under section Build Phases-> Link Binary With Library)

3) In AppDelegate class

   import CoreLocation

4) Create locationManager Object as follows

    var locationManager:CLLocationManager!

5) Write following code in didFinishLaunchingWithOptions

    locationManager = CLLocationManager()
    locationManager.delegate = self
    locationManager.desiredAccuracy = kCLLocationAccuracyBest
    locationManager.distanceFilter = 200
    locationManager.requestWhenInUseAuthorization()
    locationManager.startUpdatingLocation()

6) Confirm CLLocationManagerDelegate delegate like as follows

   class AppDelegate: UIResponder, UIApplicationDelegate, CLLocationManagerDelegate

7) Write CLLocationManagerDelegate delegate method for getting user location

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

    print("location error is = \(error.localizedDescription)")

}


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

    let locValue:CLLocationCoordinate2D = (manager.location?.coordinate)!


    print("Current Locations = \(locValue.latitude) \(locValue.longitude)")
}

回答3:

Since you're declaring location as an explicitly unwrapped optional (CLLocationManager!) it requires an initializer, either in an init method as suggested by jhurray, or just inline, as:

var location: CLLocationManager! = nil

Note that you've got other possible problems as well, including that iOS 8 has new requirements for querying the user for permission to use CoreLocation. See this question for more information.

回答4:

This is the same code as above but cleaned up to work with Swift as of the date of this posting. This worked for me.

Kudos to the original poster.

(note, stick this into whatever class you will use to handle your location stuff.)

var lastLocation = CLLocation()
var locationAuthorizationStatus:CLAuthorizationStatus!
var window: UIWindow?
var locationManager: CLLocationManager!
var seenError : Bool = false
var locationFixAchieved : Bool = false
var locationStatus : NSString = "Not Started"

override func viewDidAppear(animated: Bool) {
    super.viewDidAppear(animated)
    
    
    self.initLocationManager()
    
}
    // Location Manager helper stuff
    func initLocationManager() {
        seenError = false
        locationFixAchieved = false
        locationManager = CLLocationManager()
        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        
        locationManager.requestAlwaysAuthorization()
    }
    
    // Location Manager Delegate stuff
    
    func locationManager(manager: CLLocationManager!, didFailWithError error: NSError!) {
        locationManager.stopUpdatingLocation()
        if ((error) != nil) {
            if (seenError == false) {
                seenError = true
                print(error)
            }
        }
    }
    
    func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
        if (locationFixAchieved == false) {
            locationFixAchieved = true
            var locationArray = locations as NSArray
            var locationObj = locationArray.lastObject as CLLocation
            var coord = locationObj.coordinate
            
            println(coord.latitude)
            println(coord.longitude)
        }
    }
    
    func locationManager(manager: CLLocationManager!,  didChangeAuthorizationStatus status: CLAuthorizationStatus) {
            var shouldIAllow = false
            
            switch status {
            case CLAuthorizationStatus.Restricted:
                locationStatus = "Restricted Access to location"
            case CLAuthorizationStatus.Denied:
                locationStatus = "User denied access to location"
            case CLAuthorizationStatus.NotDetermined:
                locationStatus = "Status not determined"
            default:
                locationStatus = "Allowed to location Access"
                shouldIAllow = true
            }
            NSNotificationCenter.defaultCenter().postNotificationName("LabelHasbeenUpdated", object: nil)
            if (shouldIAllow == true) {
                NSLog("Location to Allowed")
                // Start location services
                locationManager.startUpdatingLocation()
            } else {
                NSLog("Denied access: \(locationStatus)")
            }
    }

回答5:

You need to have init functions.

Override init(coder:) and init(nibName: bundle:) and add any custom init you want.

Because you have said that location is not optional, you must initialize it before your super init calls in ALL of your init functions.

func init() {
...
location = CLLocationManager()
// either set delegate and other stuff here or in viewDidLoad
super.init(nibName:nil, bundle:nil)
// other initialization below

}

回答6:

It should be written as func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {

回答7:

Do following stuff in viewcontroller [Using swift] -

  class ViewController:     
  UIViewController,MKMapViewDelegate,CLLocationManagerDelegate {


  var locationManager: CLLocationManager?
  var usersCurrentLocation:CLLocationCoordinate2D?

  override func viewDidLoad() {
    super.viewDidLoad()

    self.locationManager = CLLocationManager()

    if CLLocationManager.authorizationStatus() == .NotDetermined{
        locationManager?.requestAlwaysAuthorization()
    }

    locationManager?.desiredAccuracy = kCLLocationAccuracyBest
    locationManager?.distanceFilter = 200
    locationManager?.delegate = self
    startUpdatingLocation()

    usersCurrentLocation = CLLocationCoordinate2DMake(LATTITUDE, LONGITUDE)
    let span = MKCoordinateSpanMake(0.005, 0.005)
    let region = MKCoordinateRegionMake(usersCurrentLocation!, span)
    mapview.setRegion(region, animated: true)
    mapview.delegate = self
    mapview.showsUserLocation = true

}

//MARK: CLLocationManagerDelegate methods

func startUpdatingLocation() {
    self.locationManager?.startUpdatingLocation()
}

func stopUpdatingLocation() {
    self.locationManager?.stopUpdatingLocation()
}

// MARK: MKMapViewDelegate

func mapView(mapView: MKMapView, didUpdateUserLocation userLocation: MKUserLocation){
    mapview.centerCoordinate = userLocation.location!.coordinate
    mapview.showsUserLocation = true
    regionWithGeofencing()

}