I'm learning about user localization in swift. I'm trying to print localization on console (later I will use it for info on label, so I want to check if it works), but I have no idea why it prints nothing. Even if delete conversions to string, and leave just for printing anything, it still doesn't work. Please help.
Yes, I added NSLocationAlwaysUsageDescription and
NSLocationWhenInUseUsageDescription.
import UIKit
import CoreLocation
import MapKit
class ViewController: UIViewController, CLLocationManagerDelegate {
var locationManager = CLLocationManager()
var myPosition = CLLocationCoordinate2D()
override func viewDidLoad() {
super.viewDidLoad()
locationManager.delegate = self
locationManager.requestWhenInUseAuthorization()
locationManager.startUpdatingLocation()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func locationManager(manager: CLLocationManager, didUpdateToLocation newLocation: CLLocation, fromLocation oldLocation: CLLocation) {
print("Got location: \(newLocation.coordinate.latitude), \(newLocation.coordinate.longitude)")
myPosition = newLocation.coordinate
locationManager.stopUpdatingLocation()
}
}
didUpdateToLocation is an outdated method of the CLLocationManagerDelegate. It is available in 10.6 and earlier. Instead, use didUpdateLocations, which will return an array of all location objects in order of time recent. You then access the latest, newest location be grabbing the last object in the returned array.
So try this
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
var latestLocation: CLLocation = locations.last;
print("Got location: \(latestLocation.coordinate.latitude), \(latestLocation.coordinate.longitude)")
}
tell me how it goes.
Related
Something like this I want to add current timestamp when recording is done in the video and save into camera roll.
**Note **: I have successfully added current location and timestamp in AVVideoPreviewLayer but it is static after exporting video is show static time does not show running timestamp
Try creating a layer of previewLayer: UIView with the components you want to have on camera.
Add this layer to currently running session of AVCaptureVideoPreviewLayer.
This link might help you to achieve your problem
Adding objects over camera view in app (Swift 3) not under camera view?
I tried something out. I guess you want to get latitude, longitude and the timestamp.
You find an example for latitude and longitude below.
import UIKit
import CoreLocation
class ViewController: UIViewController, CLLocationManagerDelegate {
var locationManager: CLLocationManager!
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 showLocation(_ sender: Any) {
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestAlwaysAuthorization()
if(CLLocationManager.locationServicesEnabled()){
locationManager.startUpdatingLocation()
}
locationManager.stopUpdatingLocation()
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let userLocation:CLLocation = locations[0] as CLLocation
print("user latitude = \(userLocation.coordinate.latitude)")
print("user longitude = \(userLocation.coordinate.longitude)")
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error)
{
print("Error \(error)")
}
}
To get the current time you can use something like this:
let date = NSDate()
print(date)
The result for both in console should look something like this:
2017-12-17 21:45:39 +0000
user latitude = 37.3322499
user longitude = -122.056264
(The time looks like this in my example because im from EU but you can convert it to what you want)
You can add this to a separate view and bring it to front with
view.bringSubview(toFront: YourView)
I hope this is helpful!
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)
}
}
info.plist file:
<key>NSLocationWhenInUseUsageDescription</key>
<string>This project would like to know your location</string>
<key>NSLocationAlwaysUsageDescription</key>
<string>location when app is in background</string>
As shown above, have added the key/value pairs for the info.plist
The problem i'm facing is that the first time i ran the app it prompted me for authorization, but, on subsequent runs the popup hasn't appeared.
second, I'm trying to print the locations from
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) using the print(location) but nothing is printed.
in the debug options i have set location as "city bicycle ride"
The code i'm using is as follows.
import UIKit
import MapKit
import CoreLocation
class ViewController: UIViewController, MKMapViewDelegate , CLLocationManagerDelegate {
#IBOutlet var map: MKMapView!
//use the locManager to get the users location
var locManager = CLLocationManager()
override func viewDidLoad() {
locManager.delegate = self
locManager.desiredAccuracy = kCLLocationAccuracyBest
locManager.requestWhenInUseAuthorization()
super.viewDidLoad()
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
print(locations)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
iOS will ask only once for location authorization. If the user denies, he will have to change this in the device settings manually. If he agrees, you will be able to obtain the location until he blocks it in the device settings.
So this code:
locManager.requestWhenInUseAuthorization()
will prompt a popup only 1 time. The problem is that you probably forget to call:
locManager.startUpdatingLocation()
You need to call this every time you want to start obtaining the location.
use this
override func viewDidLoad() {
super.viewDidLoad()
locationManager.delegate = self
locationManager.requestLocation()
locationManager.requestWhenInUseAuthorization()
locationManager.requestAlwaysAuthorization()
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.startUpdatingLocation()
}
I am trying to calculate the distance from the starting position I am (when i first start the app) to the current position and present it on a label (meters.text) but nothing appears on it..
Here is my code:
import UIKit
import CoreLocation
class CorrectViewController: UIViewController,CLLocationManagerDelegate {
#IBOutlet weak var meters: UILabel!
var wr: Int = 0
var distance = CLLocationDistance()
let locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
self.locationManager.delegate = self
self.locationManager.desiredAccuracy = kCLLocationAccuracyBest
self.locationManager.requestWhenInUseAuthorization() //starts when i use the app
self.locationManager.distanceFilter = kCLHeadingFilterNone
self.locationManager.startUpdatingLocation()
}
//locatioManager delegate method
func locationManager(manager: CLLocationManager, didUpdateToLocation newLocation: CLLocation, fromLocation oldLocation: CLLocation) {
let currentLocation: CLLocation = newLocation
let startLocation: CLLocation = oldLocation
distance = startLocation.distanceFromLocation(currentLocation)
let tripString = NSString(format: "%.2f", distance)
meters.text = ("\(tripString)")
}
func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
meters.text = ("error!")
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
Any help is appreciated:)
It appears that the location update delegate method is inside the viewDidLoad function and hence defines a local function rather than implementing the delegate method.
Move the following method out of the viewDidLoad scope:
locationManager(manager: CLLocationManager, didUpdateToLocation newLocation: CLLocation, fromLocation oldLocation: CLLocation)
In addition you are not requesting permission to use the users location. Make sure to do that and add the necessary string to your info plist.
Also: oldLocation will always be the previous location (not your initial one).
Alright, after a lot of searching and "trial and error" I found the solution here.
Instead of using the method didUpdateToLocation the method didUpdateLocations should be used. Moreover, it is really important to put NSLocationAlwaysUsageDescription or NSLocationWhenInUseUsageDescription keys in the .plist file (value may be an additional message that will be presented in location alert). These keys are required in iOS 8.
I'm trying to create a simple app that finds out the region someone is in, but I'm stuck because none of the CLLocationManagerDelegate methods are called when the app runs and finds locations.
In case it's relevant I'm also not seeing the dialog asking that I give the app permission to use location.
Here's what I have so far -
import UIKit
import CoreLocation
class ViewController: UIViewController, CLLocationManagerDelegate {
#IBOutlet weak var locationLabel : UILabel!
var locationManager = CLLocationManager()
let geocoder = CLGeocoder ()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.startUpdatingLocation()
}
override func viewDidDisappear(animated: Bool) {
locationManager.stopUpdatingLocation()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
geocoder.reverseGeocodeLocation(locations.last as CLLocation, completionHandler: {(placemark, error) in
if (error != nil) {
println("Error")
} else {
let pm = placemark.first as CLPlacemark
println(pm)
}
})
}
func locationManager(manager: CLLocationManager!, didFailWithError error: NSError!) {
println("Epic Fail")
}
}
I've put in breakpoints so I know the code is never called. I have gone in and manually turned on location services for the app while it's been running too.
try calling
func locationManager(manager: CLLocationManager!, didUpdateToLocation newLocation: CLLocation!, fromLocation oldLocation: CLLocation!)
instead of the delegate call you are making now...
I had problems with:
func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!)
aswell. But using the above delegate call fixed my issue.
Edit (didn't read the question properly...)
You never ask for permission, which is why you don't get a popup. Call the following:
locationManager.requestWhenInUseAuthorization()
This is quite an important step, and your app won't work if you haven't asked the user for authorization of your app
It is also important that you add NSLocationWhenInUseUsageDescription to your .plist file if running iOS8.
Screenshot:
The following answer question and answer gave me the solution I needed.
CLLocationManager authorization issue iOS 8
Ultimately if you're running on iOS then you must add the key
NSLocationAlwaysUsageDescription (when requesting location data to be always available)
OR
NSLocationWhenInUseUsageDescription (when requesting to use location data only when your app is running)
If you do not do this the location services access will be denied by default for your app and the user will not be prompted to allow it.
private let loctionManager = CLLocationManager() // Here
class YourViewController: ViewController {
loctionManager.delegate = self
loctionManager.requestWhenInUseAuthorization()
}
extension YourViewController: CLLocationManagerDelegate {
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
if (status == .authorizedWhenInUse) {
// do something
}
}
}
.plist
Property List
Key: Privacy - Location When In Use Usage Description
Type: String
Value: Use to add a location to your rap.
OR
Source code
<key>NSLocationWhenInUseUsageDescription</key>
<string>Use to add a location to your rap.</string>
If you tried all other answers and still having issues, just make sure CLLocationManager.init() and startUpdatingLocation are called on the same thread, preferably main thread.
I personally had a project and took me a while to figure out!