NSRangeException例外用，核心數據應用

我使用核心數據，用於存儲像RecordID，Modificationtimestamp接觸的某些細節等NSRangeException例外用，核心數據應用

我的應用程序崩潰與下列消息;

CoreData: error: Serious application error. Exception was caught during Core Data change processing. This is usually a bug within an observer of NSManagedObjectContextObjectsDidChangeNotification. *** -[_PFBatchFaultingArray objectAtIndex:]: index (68) beyond bounds (57) with userInfo (null) 
2012-12-12 13:10:11.585 SalesPro[351:907] *** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[_PFBatchFaultingArray objectAtIndex:]: index (68) beyond bounds (57)'

這是崩潰日誌：

Last Exception Backtrace: 
0 CoreFoundation     0x389c029e __exceptionPreprocess + 158 
1 libobjc.A.dylib     0x3519797a objc_exception_throw + 26 
2 CoreFoundation     0x389c01c0 +[NSException raise:format:] + 100 
3 CoreData      0x36f656ce -[_PFBatchFaultingArray objectAtIndex:] + 142 
4 CoreData      0x3701e5ec +[NSFetchedResultsController(PrivateMethods) _insertIndexForObject:inArray:lowIdx:highIdx:sortDescriptors:] + 224 
5 CoreData      0x3701adf2 -[NSFetchedResultsController(PrivateMethods) _postprocessInsertedObjects:] + 510 
6 CoreData      0x3701ca82 -[NSFetchedResultsController(PrivateMethods) _managedObjectContextDidChange:] + 2402 
7 CoreFoundation     0x38911032 _CFXNotificationPost + 1422 
8 Foundation      0x3a073d8c -[NSNotificationCenter postNotificationName:object:userInfo:] + 68 
9 CoreData      0x36faa302 -[NSManagedObjectContext(_NSInternalNotificationHandling) _postObjectsDidChangeNotificationWithUserInfo:] + 74 
10 CoreData      0x36fa9862 -[NSManagedObjectContext(_NSInternalChangeProcessing) _createAndPostChangeNotification:withDeletions:withUpdates:withRefreshes:] + 294 
11 CoreData      0x36f2bc06 -[NSManagedObjectContext(_NSInternalChangeProcessing) _processRecentChanges:] + 2694 
12 CoreData      0x36f2b10a _performRunLoopAction + 266 
13 CoreFoundation     0x389956c8 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 16 
14 CoreFoundation     0x389939bc __CFRunLoopDoObservers + 272 
15 CoreFoundation     0x38993d12 __CFRunLoopRun + 738 
16 CoreFoundation     0x38906eb8 CFRunLoopRunSpecific + 352 
17 CoreFoundation     0x38906d44 CFRunLoopRunInMode + 100 
18 GraphicsServices    0x346df2e6 GSEventRunModal + 70 
19 UIKit       0x3910e2f4 UIApplicationMain + 1116 
20 SalesPro      0x000a4c0c 0xa3000 + 7180 
21 libdyld.dylib     0x39ac7b1c start + 0

沒有與numberOfRowsInSection方法並不矛盾。

編輯

代碼更新表視圖

- (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject atIndexPath:(NSIndexPath *)indexPath forChangeType:(NSFetchedResultsChangeType)type newIndexPath:(NSIndexPath *)newIndexPath { 

    UITableView *tableView = self.table; 

    switch(type) { 

     case NSFetchedResultsChangeInsert: 
      [tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation:UITableViewRowAnimationFade]; 
      [tableView cellForRowAtIndexPath:indexPath]; 
      break; 

     case NSFetchedResultsChangeDelete: 
      [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade]; 
      break; 

     case NSFetchedResultsChangeUpdate: 
      [tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationAutomatic]; 

      break; 

     case NSFetchedResultsChangeMove: 
      [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade]; 
      [tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation: UITableViewRowAnimationFade]; 
      break; 
     } 

    [self.table reloadData]; 
} 

- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller { 
    // The fetch controller has sent all current change notifications, so tell the table view to process all updates. 
    [self.table endUpdates]; 

    [table reloadData]; 
}

來源

2012-12-12 ibiren

沒有進一步的細節，很難說這是怎麼回事，但你應該實現

- (void)controllerWillChangeContent:(NSFetchedResultsController *)controller { 
    [self.tableView beginUpdates]; 
}

的方法設置表更改。

最後，你應該叫

- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller { 
    [self.tableView endUpdates]; 
}

通知更改完成。

reloadData如果您已正確實施- (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject atIndexPath:(NSIndexPath *)indexPath forChangeType:(NSFetchedResultsChangeType)type newIndexPath:(NSIndexPath *)newIndexPath方法，則不需要此方法。

另外，正如@Mundi建議您也應該致電- (void)controller:(NSFetchedResultsController *)controller didChangeSection:(id <NSFetchedResultsSectionInfo>)sectionInfo，以便對您的部分進行更改。

我真的建議閱讀蘋果公司提供的模板NSFetchedResultsControllerDelegate Protocol Reference。

此外，你可以看看Core Data on iOS 5 Tutorial: How To Use NSFetchedResultsController。

希望有所幫助。

來源

2012-12-12 21:29:55