ipad app running Core Location in background crashes - ipad

Question

I've been working on this for a few days. Any idea what this means? please help!
let me know if more info is required
EXC_BAD_ACCESS (SIGSEGV)
Thread 11 name: Dispatch queue: com.apple.CoreLocation.ConnectionClient.0x200826b0.events
Thread 11 Crashed:
0 libdispatch.dylib 0x387b2420 dispatch_sync_f$VARIANT$mp + 0
1 CoreLocation 0x393c8088 CLConnectionClient::setCachedResponse(CLConnectionMessage*, bool ( block_pointer)()) + 76
2 CoreLocation 0x393c8558 __setDefaultMessageHandler_onQueue_block_invoke_0 + 28
3 CoreLocation 0x393c7070 __setEventHandler_block_invoke_0 + 344
4 libxpc.dylib 0x367ef7e4 _xpc_connection_mach_event + 768
5 libdispatch.dylib 0x387b6524 _dispatch_mach_msg_invoke$VARIANT$mp + 120
6 libdispatch.dylib 0x387b2e8e _dispatch_queue_drain$VARIANT$mp + 78
7 libdispatch.dylib 0x387b67b2 _dispatch_mach_invoke$VARIANT$mp + 158
8 libdispatch.dylib 0x387b2e8e _dispatch_queue_drain$VARIANT$mp + 78
9 libdispatch.dylib 0x387b2dbc _dispatch_queue_invoke$VARIANT$mp + 36
10 libdispatch.dylib 0x387b2e8e _dispatch_queue_drain$VARIANT$mp + 78
11 libdispatch.dylib 0x387b2dbc _dispatch_queue_invoke$VARIANT$mp + 36
12 libdispatch.dylib 0x387b391a _dispatch_root_queue_drain + 182
13 libdispatch.dylib 0x387b3abc _dispatch_worker_thread2 + 80
14 libsystem_c.dylib 0x34097a0e _pthread_wqthread + 358
15 libsystem_c.dylib 0x340978a0 start_wqthread + 4
- (void)startupLocationManager
{
// startup location manager for background processing
if (self.locationManager == nil)
{
self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.delegate = self;
self.locationManager.distanceFilter = kCLDistanceFilterNone;
self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
[self.locationManager startUpdatingLocation];
}
}
- (void)stopLocationManager
{
if (self.locationManager)
{
[self.locationManager stopUpdatingLocation];
self.locationManager.delegate = nil;
self.locationManager = nil;
if (self.isInBackground == YES)
{
[self startupLocationManager];
}
}
}

Answer 1

I found a solution with help from other posts. It turned out to be a timing issue. I created another method to reset my location manager and I call it with a delay. This fixed everything. Hope this helps you too.
- (void)stopLocationManager
{
if (locationManager)
{
[locationManager stopUpdatingLocation];
[self performSelector:#selector(discardLocationManager) withObject:nil afterDelay:0.1];
}
}
- (void) discardLocationManager
{
locationManager.delegate = nil;
locationManager = nil;
if (self.isRestart == YES)
{
[self performSelector:#selector(startupLocationManager) withObject:nil afterDelay:0.1];
}
}