Core Location

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Obtain the geographic location and orientation of a device using Core Location.

Posts under Core Location tag

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IOS 18 is blocking GPS connectivity for Waze/Google Maps…
On IOS 18, starting October this year, the location is not syncing in real time.You might drive for several kilometers and the location displayed on Waze will remain on the same position.This might put in position to miss the exit on the highway and have to drive another 40/50 km, lose time and energy, to get back in the original track. Reinstall the application twice is not correcting the behavior, as well as changing the device, the same issue is present on iPhone 16. Waze support team shared the following: ”Hey there! We'd like to apologize for any hassle that this has caused you. This article: https://tinyurl.com/3fu88jwj might help solve your issue. If you still need help, please open a support ticket by copying and pasting this link: https://tinyurl.com/mrx77ukz in a web browser, and someone from the team will get back to you soon." Based on the above facts, this is clearly an IOS 18 issue, that needs to be prioritized.
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Dec ’24
Unreliable CLServiceSession(authorization: .always) when using other background modes.
I am using CLServiceSession(authorization: .always) to start a service session for tracking Zone entry and exit in the background in my app. It has been working fine on iOS 18 until recently when we added some BGProcessingTasks. The task runs when the user is not moving and the device is on charge, this task runs fro a bit in the background, however we are seeing that even though we are reinitializing then session upon app launch. We have even tried to just explicitly reinitialize a session within the background task callback, but the zone tracking still continues to fail. Significant location changes are unaffected. Timeline of events: User Opens App, CLServiceSession(authorization: .always) is called (assume permissions have already been granted.) App is backgrounded User moves outside zone and app captures the data correctly (this can happen any amount of times) User plugs in Phone BGProcessingTask callback is run, it may or may not be terminated early. The service session is recreated as the first action in the callback. (we have also tried putting it in the main init() function for the app, same outcome) User moves outside zone later and app does NOT capture the data. User is sad :( The session seems to be reinitialized correctly when the app is launched due to CoreLocation updates. Is this expected behaviour or a bug? Is there a good way to debug what is happening with the sessions? Unfortunately, the WWDC sessions on this have not enlightened us about the cause of this behaviour.
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Dec ’24
Checking authorization status of AVCaptureDevice or CLLocation Manager gives runtime warnings in iOS 18
I have the following code in my ObservableObject class and recently XCode started giving purple coloured runtime issues with it (probably in iOS 18): Issue 1: Performing I/O on the main thread can cause slow launches. Issue 2: Interprocess communication on the main thread can cause non-deterministic delays. Issue 3: Interprocess communication on the main thread can cause non-deterministic delays. Here is the code: @Published var cameraAuthorization:AVAuthorizationStatus @Published var micAuthorization:AVAuthorizationStatus @Published var photoLibAuthorization:PHAuthorizationStatus @Published var locationAuthorization:CLAuthorizationStatus var locationManager:CLLocationManager override init() { // Issue 1 (Performing I/O on the main thread can cause slow launches.) cameraAuthorization = AVCaptureDevice.authorizationStatus(for: AVMediaType.video) micAuthorization = AVCaptureDevice.authorizationStatus(for: AVMediaType.audio) photoLibAuthorization = PHPhotoLibrary.authorizationStatus(for: .addOnly) //Issue 1: Performing I/O on the main thread can cause slow launches. locationManager = CLLocationManager() locationAuthorization = locationManager.authorizationStatus super.init() //Issue 2: Interprocess communication on the main thread can cause non-deterministic delays. locationManager.delegate = self } And also in route Change notification handler of AVAudioSession.routeChangeNotification, //Issue 3: Hangs - Interprocess communication on the main thread can cause non-deterministic delays. let categoryPlayback = (AVAudioSession.sharedInstance().category == .playback) I wonder how checking authorisation status can give these issues? What is the fix here?
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Dec ’24
Geofencing with CLMonitor Does Not Work After User-Initiated Task Kill
I have implemented geofencing using CLMonitor. The implementation follows this general structure: private var monitorTask: Task<Void, Never>? private var backgroundSession: CLBackgroundActivitySession? func start() async { backgroundSession = CLBackgroundActivitySession() monitorTask = Task { do { let monitor = await CLMonitor("monitor") for try await event in await monitor.events { handleEvent(event: event) } } catch {} } } func addSpot() async { let monitor = await CLMonitor("monitor") let center = CLLocationCoordinate2D(latitude: 0, longitude: 0) let condition = CLMonitor.CircularGeographicCondition(center: center, radius: 100) await monitor.add(condition, identifier: "sample-1") } When the app is not task-killed, the code inside handleEvent executes as expected. However, after a user-initiated task kill, the functionality does not work properly.
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Dec ’24
Help Needed with Saving Geofence Events Offline (UserDefaults/Core Data)
Hi everyone, I've implemented geofencing in my app, and it works well when the device is connected to the internet. The app successfully triggers region entry and exit events, even when it's in a terminated state, and sends the details to the server. However, I'm facing an issue with offline functionality. I attempted to cache geofence events (region entry/exit) when the device is offline and send them to the server once the device comes back online. I’ve tried using both UserDefaults and Core Data for caching these events, but the offline events are not being stored or processed correctly. Here’s the code that triggers the region events: func locationManager(_ manager: CLLocationManager, didEnterRegion region: CLRegion) { if let region = region as? CLCircularRegion { handleRegionEvent(region: region, eventType: "enter") } } func locationManager(_ manager: CLLocationManager, didExitRegion region: CLRegion) { if let region = region as? CLCircularRegion { handleRegionEvent(region: region, eventType: "exit") } } The region entry/exit triggers correctly, and I even receive notifications. However, nothing is being saved to storage. To cache events, I'm using this method: private func cacheEvent(_ event: GeofenceEvent) { var cachedEvents = getCachedEvents() cachedEvents.append(event) if let encoded = try? JSONEncoder().encode(cachedEvents) { UserDefaults.standard.set(encoded, forKey: cachedEventsKey) } } For UserDefaults, we've added the app group and suite name, but it's still not working as expected. Has anyone encountered similar issues or have any suggestions on how to reliably cache and sync geofence events during offline scenarios? Any help would be greatly appreciated!
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Nov ’24
CLCircularGeographicCondition 20 Condition Limit
According to the following article, the CLCircularGeographicCondition has a limit whereby only 20 conditions can be monitored by any single app. Monitoring the user’s proximity to geographic regions While I understand the rationale behind this limit, 20 conditions seems quite low for some apps. It would be good if an app could request that the user opt-in to allowing more conditions if they understand the impact this might have on the battery etc. I'm migrating an app presently to use CLCircularGeographicCondition instead of the now deprecated CLCircularRegion. It would be good if there were more guidance on how to use the new Core Location API's to monitor how many conditions are in use within an app and how they can be deactivated when no longer required, allowing the app to free up more of the 20 conditions available.
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Nov ’24
Location Error
I started getting a location error recently. I've never seen this error before and it began happeing randomly. Here is the breakpoint. (if let locationManager........) var currentLocation: Result<CLLocation, Error> { get { #if DEBUG return .success(CLLocation(latitude: CLLocationDegrees(exactly: 0)!, longitude: CLLocationDegrees(exactly: 0)!)) #else if let locationManager = self.locationManager { return locationManager.currentLocation } return .failure(LocationError.unknown) #endif } } I've tried everything I can think of to fix the issue. It has an issue getting the users location when logging in. I've made no changes to the code and everything has worked for years. The bug reports show nothing. I've tried re-installing Xcode, rebuilding the pods etc. I've tried everything that you would normally do in this situation.
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Nov ’24
Issue with geolocation without using maps
I have an application that uses geolocation to track the user’s location and trigger actions when the app is in either the foreground or background. Currently, it seems that region entry is not triggered unless an app like Maps (which actively uses location services) is opened. The location permissions are correctly set to “Always” with precise location enabled. We are using geofencing to setup region and trigger actions when entering or leaving. Is there something I’m missing in the configuration that could be preventing region monitoring from triggering properly when the app is in use or in background?
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Nov ’24
Clarification needed regarding requirements for geofencing
In my app, I am using geofencing to perform an action when the user enter or leaves a specified location. The geofencing (CLMonitor) is active permanently, and should work across multiple app sessions or after the device is restarted. It should also work after the app was minimized or terminated. This worked perfectly with iOS 17 and prior, but with iOS 18, things changed. As soon as iOS 18 dropped, users were informing me that the app does no longer perform the entry/exit action reliably (without me making any changes to the app). Most of the times, events are missed entirely. Sometimes, after the user opens or resumes the app, duplicate events are delivered and/or events with the current time instead of the correct time of entry/exit. I am making sure that the app has the "Always" location permission before geofencing is enabled The gefocence radius is between 20 and 500m, but even with the max. radius specified, the geofencing is unreliable For the same user and geofence, the entry/exit event is delivered occasionally, but not always I am currently not using CLLocationManager.allowsBackgroundLocationUpdates (even though it's documented as "Apps that receive location updates when running in the background must include the UIBackgroundModes key (with the location value) in their app’s Info.plist file") because it wasn't necessary on iOS 17 and in my tests, using it didn't yield any improvements In my search for what could have caused this change, I found this WWDC video about location authorization: . It appears that with iOS 18, it is now required to have an active CLServiceSession to ensure that location updates are delivered to my app. Even though the video is long (and I've watched it multiple times), some things are still unclear. For example, the docs state: If your app actively receives and processes location updates and terminates, it should restart those APIs upon launch in order to continue receiving updates. Also, in the video it is stated that: ... So your job, ..., is to make sure that your process launch logic knows what features it has been tasked with pursuing, and re-takes session objects... But on the other hand it's also said that: you can only start holding one (a CLServiceSession) when your app is in the foreground and also ... CLMonitor.events won’t yield results when it is not in use, unless a session which was started in the foreground, .... To summarize my questions, for the geofencing to work as described above: when exactly do I need to create a CLServiceSession if the app is launched into the backgorund? Immediately in the applicationDidFinishLaunching method, even though the app is still in the background (applicationState is background)? Or later on, when the app is opened again by the user, e.g. in applicationDidBecomeActive (and applicationState is active)? do I need to specify the background mode capability as noted in the Handling location updates in the background article? do I need to create a CLBackgroundActivitySession as noted in the Handling location updates in the background article? does it matter, which of the four initializer methods I am using to create the CLServiceSession (with CLServiceSessionAuthorizationRequirementAlways)? does it matter if I specify NSLocationRequireExplicitServiceSession in the Info.plist or not when I already do ensure that the app has the "Always" location permission when the feature is being enabled Does a CLServiceSession last indefinitely and should it only be invalidated once the user disables the feature?
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Nov ’24
CLMonitor does not always trigger on entry
I have an App which needs to monitor one CircularGeographicCondition for a feature. No other location services are required in the moment. Im facing the problem that entry events aren't forwarded to my implementation in every case on real devices. In the simulator everything is working like a charm. Exit events seemed to be working quite reliable on real devices too. Even after resuming the app from background in case of a missed entry event does not trigger the entry event. Only restarting (which recreates the monitor) triggers an entry event. The radius of my geofence is 200 meters What I have done: a. Holding a service session session = CLServiceSession(authorization: .always) b. Creating a Task which holds the CLMonitor, adds the conditions and loops through the events. My questions are: Is this expected behavior? If yes, how can I force the CLMonitor to recalculate the state of the condition? Thank you so much for your help
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Nov ’24