Oh, sorry, here is the message in the Console:
*** -[NSCFType controllerDidChangeContent:]: unrecognized selector sent to
instance 0x3a11d70
Serious application error. Exception was caught during Core Data change
processing: *** -[NSCFType controllerDidChangeContent:]: unrecognized selector
sent to instance 0x3a11d70 with userInfo (null)
*** Terminating app due to uncaught exception 'NSInvalidArgumentException',
reason: '*** -[NSCFType controllerDidChangeContent:]: unrecognized selector
sent to instance 0x3a11d70'
Stack: ( ...
On 25/12/2009, at 16:40 , Brian Bruinewoud wrote:
> This has me totally stumped.
>
> I have an app that contains (currently) three Entities:
> Person
> Deed; and
> DeedDoneByPerson
>
> Deed is effectively a template object. I'll probably re-do the object model
> but I want to understand what's going on with this bug first.
>
> Deeds can be good or not and have a degree of goodness.
>
> Here is the code that creates a new deed and deedDoneByPerson:
>
> NSManagedObject *newDeed = [ NSEntityDescription
> insertNewObjectForEntityForName: @"Deed"
>
> inManagedObjectContext: context ];
>
> int score;
> if( self.isGood ) score = sender.tag;
> else score = - sender.tag;
>
> [newDeed setValue: self.deedName.text
> forKey: @"deedName" ];
> [newDeed setValue: [ NSNumber numberWithBool: self.isGood ]
> forKey: @"isGood" ];
> [newDeed setValue: [ NSNumber numberWithInt: score ]
> forKey: @"points" ];
>
> NSManagedObject *newDeedDoneByPerson = [ NSEntityDescription
> insertNewObjectForEntityForName: @"DeedDoneByPerson"
>
> inManagedObjectContext: context ];
>
> [newDeedDoneByPerson setValue: newDeed
> forKey: @"deedDone" ];
> [newDeedDoneByPerson setValue: selectedPerson
> forKey: @"byPerson" ];
> [newDeedDoneByPerson setValue: [ NSNumber numberWithBool: self.isGood
> ] forKey: @"isGood" ];
> // let 'points' and 'instances' default
>
> FYI2( @":: Create new deed [...@]", self.deedName.text );
> NSError *error;
> if (![context save:&error]) //!!!!!!! CRASHES HERE !!!!!!!!
> {
> NSLog(@"!! Unresolved error %@, %@", error, [error userInfo]);
> abort();
> }
>
>
> The following scenarios work:
> With a fresh app (deleted from the simulator and re-installed), create a
> person and add any number of bad deeds to that person - they are displayed
> correctly and sqlite has the expected contents.
> With a fresh app (deleted from the simulator and re-installed), create a
> person and add any number of good deeds to that person - they are displayed
> correctly and sqlite has the expected contents.
> With a fresh app (deleted from the simulator and re-installed), create a
> person and add any number of bad deeds to that person - they are displayed
> correctly and sqlite has the expected contents. Then create another person
> and add any number of good deeds to that person - they are displayed
> correctly and sqlite has the expected contents
>
> The following scenario does NOT work:
> With a fresh app (deleted from the simulator and re-installed), create a
> person and add a bad deed to that person then attempt to add a good deed. BOOM
>
> Stack trace:
> #0 0x93affedb in objc_msgSend
> #1 0x939f4b6c in ??
> #2 0x0001763a in _nsnote_callback
> #3 0x01d34005 in _CFXNotificationPostNotification
> #4 0x00014ef0 in -[NSNotificationCenter
> postNotificationName:object:userInfo:]
> #5 0x01ba717d in -[NSManagedObjectContext(_NSInternalNotificationHandling)
> _postObjectsDidChangeNotificationWithUserInfo:]
> #6 0x01c06763 in -[NSManagedObjectContext(_NSInternalChangeProcessing)
> _createAndPostChangeNotification:withDeletions:withUpdates:withRefreshes:]
> #7 0x01b8b5ea in -[NSManagedObjectContext(_NSInternalChangeProcessing)
> _processRecentChanges:]
> #8 0x01bc1728 in -[NSManagedObjectContext save:]
> #9 0x00005434 in -[NewDeedViewController commit:] at
> NewDeedViewController.m:131 <------------------- CODE ABOVE
> #10 0x00298459 in -[UIApplication sendAction:to:from:forEvent:]
> #11 0x002fbba2 in -[UIControl sendAction:to:forEvent:]
> #12 0x002fddc3 in -[UIControl(Internal) _sendActionsForEvents:withEvent:]
> #13 0x002fcb0f in -[UIControl touchesEnded:withEvent:]
> #14 0x002b1e33 in -[UIWindow _sendTouchesForEvent:]
> #15 0x0029b81c in -[UIApplication sendEvent:]
> #16 0x002a20b5 in _UIApplicationHandleEvent
> #17 0x0252cef1 in PurpleEventCallback
> #18 0x01d40b80 in CFRunLoopRunSpecific
> #19 0x01d3fc48 in CFRunLoopRunInMode
> #20 0x0252b7ad in GSEventRunModal
> #21 0x0252b872 in GSEventRun
> #22 0x002a3003 in UIApplicationMain
> #23 0x00001cb4 in main at main.m:14
>
> I don't understand how the value of 'score' breaks things. If I get rid of
> the negation in this code:
> int score;
> if( self.isGood ) score = sender.tag;
> else score = - sender.tag;
> everything works fine: adding good and bad to the same person is acceptable.
>
> Any suggestions on what to investigate?
>
>
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