CLLocationManagerDelegate not receiving updates

Question

I have a view controller which hase these functions:

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

    print("loc")
}
func locationManager(manager: CLLocationManager, didFailWithError error: NSError){
    if(error.code == CLError.Denied.rawValue){
        print("error")
    }
}

It is direct child of this class:

import UIKit
import CoreLocation

class UIViewLocationManager : UIViewController, CLLocationManagerDelegate{

    func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
        print(status.rawValue)
        switch status {
        case .NotDetermined:
            break

        case .AuthorizedWhenInUse:
            if #available(iOS 9.0, *) {
                manager.requestLocation()
            } else {
                manager.startUpdatingLocation()
            }
            break

        case .AuthorizedAlways:
            break

        case .Denied:
            break

        default:
            break
        }
    }
}

And then I have this class

class CoreLocationController : NSObject {

    func requestLocationUpdate(delegate : CLLocationManagerDelegate){
        let locationManager = CLLocationManager()
        locationManager.delegate = delegate
        if #available(iOS 8.0, *) {
            locationManager.requestWhenInUseAuthorization()
        } else {
            locationManager.startUpdatingLocation()
        }

then in AppDelegate I declare it like:

let coreLocationController = CoreLocationController()

But when I call requestLocationUpdate(self) from viewController which is child of UIViewLocationManager I dont receive any updates. However if I just copy-paste all methods to CoreLocationController and I do locationManager.delegate = self in CoreLocationController init() method than everything works fine.

Any ideas? I am really desperate because I have already tried so much aproaches but still cant get this working.

Thanks in advance

score 1 · Accepted Answer · edited May 23 '17 at 10:28

1

locationManager is a local variable within the requestLocationUpdate method. At the end of the call to requestLocationUpdate, locationManager will be destroyed and the CLLocationManager just created will have nothing referencing it, so it will be destroyed too, despite the fact that you have asked it to send messages to an extant delegate.

If the instance of CoreLocationController you have created is not destroyed - something always points to the instance - then changing locationManager to an instance variable should fix this:

class CoreLocationController : NSObject {
    var locationManager:CLLocationManager?
    func requestLocationUpdate(delegate : CLLocationManagerDelegate) {
        locationManager = CLLocationManager()
        locationManager?.delegate = delegate
        locationManager?.requestWhenInUseAuthorization()
    }
}

The above code is working for me in a real iPhone 5 and in a simulated iPhone 6. The location update delegate code gets called. I did have to edit the plist as specified in CLLocation Manager in Swift to get Location of User

edited May 23 '17 at 10:28

Community

1
1

answered Feb 06 '16 at 17:23

emrys57

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This solution is partialy working. By using it my didChangeAuthorizationStatus in super class is fired but I get no location update from child class ("loc" is never printed) even that I have location setup in simulator – horin Feb 06 '16 at 19:33
Not sure about that, I've never used location in a simulator. Try a real device? – emrys57 Feb 06 '16 at 19:35
well I dont think that this is issue with simulator. It worked when I had all code in same class (CoreLocationController). I have seen some solution suggesting that this could be related to asigning delegate not on main thread. Maybe I will try something regarding threads tomorow. Anyway if anything else comes on your mind just post it – horin Feb 06 '16 at 19:42
You have edited your plist? http://stackoverflow.com/questions/24050633/implement-cllocationmanagerdelegate-methods-in-swift/24056771#24056771 – emrys57 Feb 06 '16 at 21:31
yes of course. WIthout it it wouldnt be even working when I put delegate to CoreLocationController – horin Feb 07 '16 at 06:46

CLLocationManagerDelegate not receiving updates

1 Answers1