SWIFT: Core Location returning nil - how to call didUpdateLocations? - ios

Question

I have an issue with Core Location, I've followed the setup from
https://stackoverflow.com/a/24696878/6140339 this answer, and placed all my code in AppDelegate, but I can't figure out how to call it, so I created another function that does the same thing as didUpdateLocations, and called it inside my findMyLocation button, and it is only returning nil.
I have tried setting a custom location in Simulator, still nil, I tried using the debugger and setting a location, I even tried testing it on my iphone to see if i could get a location, and still nothing.
is there a way to call didUpdateLocations from my button?
Or am I just doing something else wrong that im missing.
here is my code in my viewController:
import UIKit
import Social
import CoreLocation
class FirstViewController: UIViewController{
//let social = socialFunctions()
let locationManager = CLLocationManager()
let location = locationFunctions()
var locationFixAchieved = false
var currentLocation = CLLocation()
#IBOutlet weak var locationLabel: UILabel!
#IBAction func findMyLocation(sender: AnyObject) {
updateLocation()
print("Location: \(locationManager.location)")
}
#IBAction func postToFacebookButton(sender: UIButton) {
postToFacebook()
}
#IBAction func postTweetButton(sender: UIButton) {
postToTwitter()
}
override func preferredStatusBarStyle() -> UIStatusBarStyle {
return .LightContent
}
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
//MARK: - SOCIAL FUNCTIONS
func postToFacebook(){
if(SLComposeViewController.isAvailableForServiceType(SLServiceTypeFacebook)){
let socialController = SLComposeViewController(forServiceType: SLServiceTypeFacebook)
//creates post with pre-desired text
socialController.setInitialText("")
presentViewController(socialController, animated: true, completion: nil)
}
}
func postToTwitter(){
if(SLComposeViewController.isAvailableForServiceType(SLServiceTypeTwitter)){
let socialController = SLComposeViewController(forServiceType: SLServiceTypeTwitter)
//creates post with pre-desired text
socialController.setInitialText("")
presentViewController(socialController, animated: true, completion: nil)
}
}
//MARK: - LOCATION FUNCTIONS
func updateLocation() {
let locations = [CLLocation]()
if (locationFixAchieved == false) {
locationFixAchieved = true
let locationArray = locations as NSArray
let locationObj = locationArray.lastObject as? CLLocation
let coord = locationObj?.coordinate
if coord?.latitude != nil {
locationLabel.text = ("Location \r\n Latitude: \(coord?.latitude) \r\n Longitude: \(coord?.longitude)")
print("Latitude: \(coord?.latitude)")
print("Longitude: \(coord?.longitude)")
} else {
locationLabel.text = ("Could not find location")
print("LAT & LONG are nil")
}
}
}
}
Here is the code i added to my appDelegate
import UIKit
import CoreLocation
let fvc = FirstViewController()
#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: [NSObject : AnyObject]?) -> Bool {
initLocationManager();
return true
}
func initLocationManager() {
seenError = false
locationFixAchieved = false
locationManager = CLLocationManager()
locationManager.delegate = self
CLLocationManager.locationServicesEnabled()
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestAlwaysAuthorization()
}
func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
locationManager.stopUpdatingLocation()
if (error == true) {
if (seenError == false) {
seenError = true
print(error)
}
}
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let locations = [CLLocation]()
if (locationFixAchieved == false) {
locationFixAchieved = true
let locationArray = locations as NSArray
let locationObj = locationArray.lastObject as? CLLocation
let coord = locationObj?.coordinate
print("Latitude: \(coord?.latitude)")
print("Longitude: \(coord?.longitude)")
//fvc.locationLabel.text = ("Location \r\n Latitude: \(coord?.latitude) \r\n Longitude: \(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 location Access"
shouldIAllow = true
}
NSNotificationCenter.defaultCenter().postNotificationName("LabelHasBeenUpdated", object: nil)
if (shouldIAllow == true) {
NSLog("Location Allowed")
//Start location services
locationManager.startUpdatingLocation()
} else {
NSLog("Denied access: \(locationStatus)")
}
}

Answer 1

Following dan's comment(thank you) all I had to do was delete the first line, and it shows the coordinates, i have yet to figure out how to call my function to change the label text, but i will post that when i figure it out. EDIT: posted solution below
I changed
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let locations = [CLLocation]()
if (locationFixAchieved == false) {
locationFixAchieved = true
let locationArray = locations as NSArray
let locationObj = locationArray.lastObject as? CLLocation
let coord = locationObj?.coordinate
print("Latitude: \(coord?.latitude)")
print("Longitude: \(coord?.longitude)")
//fvc.locationLabel.text = ("Location \r\n Latitude: \(coord?.latitude) \r\n Longitude: \(coord?.longitude)")
}
}
deleting let locations = [CLLocation]()
This is how i called it when i press the button.
func updateLocation() {
let manager = CLLocationManager()
let locValue : CLLocationCoordinate2D = (manager.location?.coordinate)!;
let long = locValue.longitude
let lat = locValue.latitude
print(long)
print(lat)
locationLabel.text = ("Location \r\nLatitude: \(lat) \r\nLongitude: \(long)")
}