Good morning, I've developed an application where we download a JSON of objects and we store those information on a CoreData table. We've also created a Collection view used to show those information through a NSFetchedResultsController. Can someone helps me to understand the reason why I get this issue?
Thanks indeed
Fatal Exception: NSInvalidArgumentException
0 CoreFoundation 0x83f20 __exceptionPreprocess
1 libobjc.A.dylib 0x16018 objc_exception_throw
2 CoreFoundation 0x1b6250 _NSArrayRaiseInsertNilException
3 CoreFoundation 0x16f5c -[__NSCFArray objectAtIndex:]
4 CoreData 0x13af14 -[_PFMutableProxyArray subarrayWithRange:]
5 CoreData 0xc4948 -[_NSDefaultSectionInfo objects]
6 CoreData 0x9c3fc -[NSFetchedResultsController _conditionallyDispatchSnapshotToDelegate:updatesInfo:]
7 CoreData 0x6d4ec __82-[NSFetchedResultsController(PrivateMethods) _core_managedObjectContextDidChange:]_block_invoke
8 CoreData 0x270dc developerSubmittedBlockToNSManagedObjectContextPerform
9 CoreData 0x9d0ec -[NSManagedObjectContext performBlockAndWait:]
10 CoreData 0x9c6e8 -[NSFetchedResultsController _core_managedObjectContextDidChange:]
11 CoreFoundation 0x5178c __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__
12 CoreFoundation 0x516a8 ___CFXRegistrationPost_block_invoke
13 CoreFoundation 0x515f0 _CFXRegistrationPost
14 CoreFoundation 0x4fbb8 _CFXNotificationPost
15 Foundation 0x31574 -[NSNotificationCenter postNotificationName:object:userInfo:]
16 CoreData 0x6a548 -[NSManagedObjectContext _createAndPostChangeNotification:deletions:updates:refreshes:deferrals:wasMerge:]
17 CoreData 0x69d10 -[NSManagedObjectContext _postRefreshedObjectsNotificationAndClearList]
18 CoreData 0x68a4c -[NSManagedObjectContext _processRecentChanges:]
19 CoreData 0x91494 -[NSManagedObjectContext _coreMergeChangesFromDidSaveDictionary:usingObjectIDs:withClientQueryGeneration:]
20 CoreData 0x90334 -[NSManagedObjectContext mergeChangesFromContextDidSaveNotification:]
21 CoreData 0x270dc developerSubmittedBlockToNSManagedObjectContextPerform
22 libdispatch.dylib 0x3dd4 _dispatch_client_callout
23 libdispatch.dylib 0x125a4 _dispatch_main_queue_drain
24 libdispatch.dylib 0x121b8 _dispatch_main_queue_callback_4CF
25 CoreFoundation 0x56710 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__
26 CoreFoundation 0x53914 __CFRunLoopRun
27 CoreFoundation 0x52cd8 CFRunLoopRunSpecific
28 GraphicsServices 0x11a8 GSEventRunModal
29 UIKitCore 0x40a90c -[UIApplication _run]
30 UIKitCore 0x4be9d0 UIApplicationMain
31 Rainbow 0x80c0 main + 15 (main.swift:15)
32 ??? 0x1b3419e4c (Mancante)