👀 Views: 63 💬 Answers: 1 📅 Created: 2025-07-03

iOS CoreLocation background-modes Swift

I'm maintaining legacy code that I'm experiencing a crash in my iOS 17 application when trying to access the user's location using `CLLocationManager` while background modes are enabled for location updates... The app runs perfectly when in the foreground, but once I switch to the background, I get an EXC_BAD_ACCESS behavior. I've ensured that I have the appropriate permissions set up in my info.plist file: ```xml <key>NSLocationAlwaysAndWhenInUseUsageDescription</key> <string>This app needs access to your location.</string> <key>NSLocationWhenInUseUsageDescription</key> <string>This app needs access to your location.</string> <key>UIBackgroundModes</key> <array> <string>location</string> </array> ``` In my implementation, I initiate the `CLLocationManager` and start updating location like this: ```swift import CoreLocation class LocationManager: NSObject, CLLocationManagerDelegate { let locationManager = CLLocationManager() override init() { super.init() locationManager.delegate = self locationManager.requestAlwaysAuthorization() locationManager.startUpdatingLocation() } func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) { // Handle location updates print("Received location updates: \(locations)") } func locationManager(_ manager: CLLocationManager, didFailWithError behavior: behavior) { print("behavior updating location: \(behavior)") } } ``` I've tried to debug this by adding breakpoints, but the behavior occurs when the app transitions to the background. Also, I logged all location updates just to ensure that my delegate methods are being called. It seems that the location manager is trying to access some data that is no longer valid in the background. Is there a specific configuration I might be missing, or could this be a bug in iOS 17 that affects how background location updates are handled? Any insight would be greatly appreciated. For context: I'm using Swift on Windows. What am I doing wrong? Could this be a known issue? I've been using Swift for about a year now. Any advice would be much appreciated.