I have a core data, document based, storyboard OS X application. There is a test project here:
https://github.com/ericgorr/sb_ac_doc which is just the default project Xcode creates with a few modifications. I have a single view controller and the view contains a table view which will eventually display the data in the Core Data document. I will also using an array controller to manage the rows for the table view. The three scenes are: - Application Scene - Window Controller Scene - Main View Controller Scene The *Main View Controller Scene* contains the *TestItem Array Controller*. The *TestItem View Controller* contains the code: class ViewController: NSViewController { var context: NSManagedObjectContext? // // ... // } The *TestItem Array Controller* contains the Parameters Binding: Managed Object Context Bind to: Main View Controller Model Key Path: context In Document.swift: override func makeWindowControllers() { let moc = self.managedObjectContext! // Returns the Storyboard that contains your Document window. let storyboard = NSStoryboard(name: "Main", bundle: nil) let windowController = storyboard.instantiateControllerWithIdentifier( "Document Window Controller" ) as! NSWindowController let contentController = windowController.contentViewController as! ViewController NSLog( "%@", self.managedObjectContext! ) contentController.context = self.managedObjectContext! NSLog( "%@", contentController.context! ) self.addWindowController( windowController ) } This is my attempt to pass the MOC to the view controller before the array controller attempts to access it. The NSLog's both print out valid values. However, I am getting the following crash: 2016-03-13 20:13:02.667 sb_ac_doc[73021:16415257] Cannot perform operation without a managed object context 2016-03-13 20:13:02.669 sb_ac_doc[73021:16415257] ( 0 CoreFoundation 0x00007fff956f9ae2 __exceptionPreprocess + 178 1 libobjc.A.dylib 0x00007fff9a09073c objc_exception_throw + 48 2 CoreFoundation 0x00007fff956f998d +[NSException raise:format:] + 205 3 AppKit 0x00007fff8c8224e7 -[_NSManagedProxy _managedObjectContext] + 66 4 AppKit 0x00007fff8c822507 -[_NSManagedProxy _persistentStoreCoordinator] + 22 5 AppKit 0x00007fff8c82257a -[_NSManagedProxy _entity] + 46 6 AppKit 0x00007fff8c822802 -[_NSManagedProxy fetchRequestWithSortDescriptors:limit:] + 89 7 AppKit 0x00007fff8c821fec -[NSObjectController(NSManagedController) _executeFetch:didCommitSuccessfully:actionSender:] + 75 8 AppKit 0x00007fff8c5c18c2 -[NSController _controllerEditor:didCommit:contextInfo:] + 185 9 CoreFoundation 0x00007fff955c417c __invoking___ + 140 10 CoreFoundation 0x00007fff955c3fce -[NSInvocation invoke] + 286 11 CoreFoundation 0x00007fff95663be6 -[NSInvocation invokeWithTarget:] + 54 12 Foundation 0x00007fff87cce345 __NSFireDelayedPerform + 377 13 CoreFoundation 0x00007fff9563fbc4 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 20 14 CoreFoundation 0x00007fff9563f853 __CFRunLoopDoTimer + 1075 15 CoreFoundation 0x00007fff956bde6a __CFRunLoopDoTimers + 298 16 CoreFoundation 0x00007fff955facd1 __CFRunLoopRun + 1841 17 CoreFoundation 0x00007fff955fa338 CFRunLoopRunSpecific + 296 18 HIToolbox 0x00007fff8add1935 RunCurrentEventLoopInMode + 235 19 HIToolbox 0x00007fff8add1677 ReceiveNextEventCommon + 184 20 HIToolbox 0x00007fff8add15af _BlockUntilNextEventMatchingListInModeWithFilter + 71 21 AppKit 0x00007fff8c25e0ee _DPSNextEvent + 1067 22 AppKit 0x00007fff8c62a943 -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 454 23 AppKit 0x00007fff8c253fc8 -[NSApplication run] + 682 24 AppKit 0x00007fff8c1d6520 NSApplicationMain + 1176 25 sb_ac_doc 0x0000000100002427 main + 87 26 libdyld.dylib 0x00007fff987455ad start + 1 ) What is the correct pattern I should use so the array controller can access the MOC of the document? _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
