I have two different classes, one of them, LocationService, is just for determining location. Problem is that I don't know why it doesn't update coordinates variable.
ViewController:
import UIKit
class ViewController: UIViewController {
var coords: (lat: Double, long: Double) = (0,0)
var tracking = LocationServices()
override func viewDidLoad() {
super.viewDidLoad()
tracking.startTracking()
tracking.getLocations()
coordinat = tracking.coordinates
retreiveWeatherForecast()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// retrieveWeatherForecast functions
And simple locationService class:
import UIKit
import CoreLocation
class LocationServices: NSObject, CLLocationManagerDelegate {
var locationManager = CLLocationManager()
var coordinates: (lat: Double, long: Double) = (0,0)
func startTracking() {
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestAlwaysAuthorization()
locationManager.startUpdatingLocation()
}
func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
locationManager.stopUpdatingLocation()
print(error)
}
func getLocations() {
#if os (ios)
func locationManager(manager:CLLocationManager, didUpdateLocations locations:[AnyObject]) {
//println("locations = \(locationManager)")
var latValue = locationManager.location.coordinate.latitude
var lonValue = locationManager.location.coordinate.longitude
coordinates = (latValue,lonValue)
println(latValue)
println(lonValue)
}
#endif
}
}
When I build it, it returns weather with default coordinates = (0,0).
Well, I accidentally made it work. As far as I understand problem was here: func locationManager(manager:CLLocationManager, didUpdateLocations locations:[AnyObject]) locations must be of CLLocation type, not AnyObject.
I'm using Swift 2.0.
Related
I tried to use CoreLocation with Swift to track the user's location:
(Below you can find the code of may ViewController.swift file.)
But the code doesn't seems working as I've expected, because I'm still getting the same error every-time I'm launching the application:
I'm sure this is the problem why I'm not able to get a result from the locationManager() function that should print out the current location.
It says "Cannot assign value of type 'ViewController' to type 'CLLocationManagerDelegate?'"
import UIKit
import CoreLocation
class ViewController: UIViewController, WKUIDelegate {
override func viewDidLoad() {
super.viewDidLoad()
if CLLocationManager.locationServicesEnabled() {
print("CLLocationManager is available")
locationManager.desiredAccuracy = kCLLocationAccuracyThreeKilometers
locationManager.delegate = self
locationManager.startUpdatingLocation()
}
}
let locationManager = CLLocationManager()
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
if let location = locations.first {
print(location.coordinate)
}
}
}
Does anyone now how to fix this problem? - Any help would be very appreciated, thanks a million in advance.
You simply need to declare conformance to CLLocationManagerDelegate. You can either do this directly in the class declaration just as you did with WKUIDelegate or in an extension of ViewController.
class ViewController: UIViewController, WKUIDelegate, CLLocationManagerDelegate {
override func viewDidLoad() {
super.viewDidLoad()
if CLLocationManager.locationServicesEnabled() {
print("CLLocationManager is available")
locationManager.desiredAccuracy = kCLLocationAccuracyThreeKilometers
locationManager.delegate = self
locationManager.startUpdatingLocation()
}
}
let locationManager = CLLocationManager()
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
if let location = locations.first {
print(location.coordinate)
}
}
}
With extension:
class ViewController: UIViewController, WKUIDelegate {
let locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
if CLLocationManager.locationServicesEnabled() {
print("CLLocationManager is available")
locationManager.desiredAccuracy = kCLLocationAccuracyThreeKilometers
locationManager.delegate = self
locationManager.startUpdatingLocation()
}
}
}
extension ViewController: CLLocationManagerDelegate {
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
if let location = locations.first {
print(location.coordinate)
}
}
}
I'm trying to find present location coordinates,but my program not calling didUpdateLocations method. And Also i add NSLocationWhenInUseUsageDescription in info.plist. Any help please (i'm using Version 7.2 (7C68)). I'm Testing simulator only.
import UIKit
import CoreLocation
import MapKit
class ViewController: UIViewController, CLLocationManagerDelegate {
var location: CLLocationManager!
override func viewDidLoad() {
let location = CLLocationManager()
location.delegate = self
location.desiredAccuracy = kCLLocationAccuracyBest
location.startUpdatingLocation()
location.requestWhenInUseAuthorization()
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation])
{
let cord = locations[0] as CLLocation
let lati = cord.coordinate.latitude
let long = cord.coordinate.longitude
print(lati,"",long)
}
}
I use CLLocationManager to request the user's location. However, if they are outside of New York City, I want to default to certain coordinates. Is there a way to check if they are in a certain city?
import UIKit
import CoreLocation
import GoogleMaps
private let kDefaultLatitude: Double = 40.713
private let kDefaultLongitude: Double = -74.000
private let kDefaultZoomLevel: Float = 16.0
class RootMapViewController: UIViewController {
#IBOutlet weak var mapView: GMSMapView!
let locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
fetchLocation()
}
private func fetchLocation() {
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestWhenInUseAuthorization()
locationManager.startUpdatingLocation()
}
}
// MARK: CLLocationManagerDelegate
extension RootMapViewController: CLLocationManagerDelegate {
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
locationManager.stopUpdatingLocation()
let userCoordinates = locations[0].coordinate
// How do I check if the user is in NYC?
// if user is in nyc
centerMapOn(userCoordinates)
mapView.myLocationEnabled = true
mapView.settings.myLocationButton = true
// else default to Times Square
}
}
You can use reverse geocoding. For example you can place:
geocoder:CLGeocoder = CLGeocoder()
geocoder.reverseGeocodeLocation(locations[0],completionHandler{
if error == nil && placemarks.count > 0 {
let location = placemarks[0] as CLPlacemark
print(location.locality)
})
in func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation])
I am getting the users current location and dropping this as a println(). The idea is that I am going to hit a button to get the new location, however currently the app keeps updating constantly (every second) instead. I have tried moving the getLocation() function inside my IBAction but that crashed the thing. I have updated the info.plist so thats not a problem. Heres le code:
import UIKit
import CoreLocation
class ViewController: UIViewController, CLLocationManagerDelegate{
#IBOutlet var latitude : UILabel!
#IBOutlet var longitude : UILabel!
var locationManager = CLLocationManager()
var startLocation: CLLocation!
override func viewDidLoad() {
super.viewDidLoad()
locationManager = CLLocationManager()
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.delegate = self
locationManager.requestWhenInUseAuthorization()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func findMyLocation(sender: AnyObject){
startLocation = nil
locationManager.startUpdatingLocation()
}
func getLocation(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!){
var userLocation:AnyObject = locations[0] as! CLLocation
var strlat = String(format: "%.4f", userLocation.coordinate.latitude)
var strlong = String(format: "%.4f",userLocation.coordinate.longitude)
latitude.text = String(format: "%.4f", userLocation.coordinate.latitude)
longitude.text = String(format: "%.4f",userLocation.coordinate.longitude)
println("latitude: " + strlat)
println("longitide: " + strlong)
if startLocation == nil {
startLocation = userLocation as! CLLocation
locationManager.stopUpdatingLocation()
}
}
func locationManager(manager: CLLocationManager!,
didFailWithError error: NSError!) {
}
}
Move the locationManager.startUpdatingLocation() to your findMyLocation function. This will start the locationManager when your button is pressed and begin calling the didUpdateLocations Inside your if startLocation == nil add locationManager.stopUpdatingLocation() this will stop the locationManager after you have set your startLocation var. Every time the user presses the button the process will run again.
One additional note, you should add more code into the didUpdateLocations to check the accuracy and timestamp of the location before you use it as it may not be a valid/accurate location for what you are trying to do.
UPDATE:
Had a chance to validate and the code will work with the changes suggested. Here is what your final code should look like. I am also assuming you have set your plist entries for locations services and your simulator is set to simulate locaitons.
import UIKit
import CoreLocation
class ViewController: UIViewController, CLLocationManagerDelegate{
#IBOutlet var latitude : UILabel!
#IBOutlet var longitude : UILabel!
var locationManager : CLLocationManager! = CLLocationManager()
var startLocation: CLLocation!
override func viewDidLoad() {
super.viewDidLoad()
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.delegate = self
locationManager.requestWhenInUseAuthorization()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func findMyLocation(sender: AnyObject){
startLocation = nil
locationManager.startUpdatingLocation()
}
func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!){
var userLocation:AnyObject = locations[0] as! CLLocation
var strlat = String(format: "%.4f", userLocation.coordinate.latitude)
var strlong = String(format: "%.4f",userLocation.coordinate.longitude)
latitude.text = String(format: "%.4f", userLocation.coordinate.latitude)
longitude.text = String(format: "%.4f",userLocation.coordinate.longitude)
println("latitude: " + strlat)
println("longitide: " + strlong)
if startLocation == nil {
startLocation = userLocation as! CLLocation
locationManager.stopUpdatingLocation()
}
}
func locationManager(manager: CLLocationManager!, didFailWithError error: NSError!) {
println("error with location manager: " + error.description)
}
}
Im learning Xcode 6.3 and swift and following a book from apress Beginning Xcode with swift, in chapter 4 when doing the first tab for the location tracker it shows nothing at all and I'm confused. The code for the first tab is this
import UIKit
import CoreLocation
class TrackViewController: UIViewController, CLLocationManagerDelegate {
var locationManager: CLLocationManager!
#IBOutlet weak var locationText: UITextView!
#IBOutlet weak var toggleSwitch: UISwitch!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func changeToggle(sender: UISwitch) {
if toggleSwitch.on {
self.locationText.text = " "
if (CLLocationManager.locationServicesEnabled() == false) {
self.toggleSwitch.on = false
}
if locationManager == nil {
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.distanceFilter = 10.0
locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
locationManager.requestWhenInUseAuthorization()
UIApplication.sharedApplication().cancelAllLocalNotifications()
NSLog("location is on supposely")
}
locationManager.startUpdatingLocation()
} else {
if locationManager != nil {
locationManager.stopUpdatingLocation()
}
}
}
func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
var location: CLLocation = locations[locations.endIndex - 1] as! CLLocation
self.locationText.text = location.description
}
func locationManager(manager: CLLocationManager!, didFailWithError error: NSError!) {
locationText.text = "failed with error \(error.description)"
}
}
I have activated in the simulator the location services and in info.plist added the NSLocationWhenInUsageDescription and the Privacy - Location..., but nothing happens when toggling the switch I get no feedback that something is on. Any help??