iPhone：核心數據保存錯誤

Question

試圖對象保存到我的核心數據模型時，我收到以下錯誤：

2010-09-01 22:07:50.569 Score Card[26566:207] *** Assertion failure in -[UITableView _endCellAnimationsWithContext:], /SourceCache/UIKit_Sim/UIKit-1262.60.3/UITableView.m:904 
2010-09-01 22:07:50.570 Score Card[26566:207] Serious application error. Exception was caught during Core Data change processing. This is usually a bug within an observer of NSManagedObjectContextObjectsDidChangeNotification. Invalid update: invalid number of sections. The number of sections contained in the table view after the update (1) must be equal to the number of sections contained in the table view before the update (1), plus or minus the number of sections inserted or deleted (1 inserted, 0 deleted). with userInfo (null) 
Detected an attempt to call a symbol in system libraries that is not present on the iPhone: 
_Unwind_Resume called from function -[NSManagedObjectContext(_NSInternalChangeProcessing) _processRecentChanges:] in image CoreData. 
2010-09-01 22:07:50.572 Score Card[26566:207] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid update: invalid number of sections. The number of sections contained in the table view after the update (1) must be equal to the number of sections contained in the table view before the update (1), plus or minus the number of sections inserted or deleted (1 inserted, 0 deleted).' 
*** Call stack at first throw: 
(
0 CoreFoundation      0x02661b99 __exceptionPreprocess + 185 
1 libobjc.A.dylib      0x027b140e objc_exception_throw + 47 
2 CoreFoundation      0x0261a238 +[NSException raise:format:arguments:] + 136 
3 Foundation       0x000bae37 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 116 
4 UIKit        0x0033a9a6 -[UITableView(_UITableViewPrivate) _endCellAnimationsWithContext:] + 7806 
5 UIKit        0x0032a75b -[UITableView insertSections:withRowAnimation:] + 56 
6 Score Card       0x00003918 -[History controller:didChangeSection:atIndex:forChangeType:] + 133 
7 CoreData       0x0246db81 -[NSFetchedResultsController(PrivateMethods) _managedObjectContextDidChange:] + 2177 
8 Foundation       0x0002a0e1 _nsnote_callback + 145 
9 CoreFoundation      0x02639f29 __CFXNotificationPost_old + 745 
10 CoreFoundation      0x025b926a _CFXNotificationPostNotification + 186 
11 Foundation       0x0001fc8a -[NSNotificationCenter postNotificationName:object:userInfo:] + 134 
12 CoreData       0x023a8879 -[NSManagedObjectContext(_NSInternalNotificationHandling) _postObjectsDidChangeNotificationWithUserInfo:] + 89 
13 CoreData       0x02418193 -[NSManagedObjectContext(_NSInternalChangeProcessing) _createAndPostChangeNotification:withDeletions:withUpdates:withRefreshes:] + 259 
14 CoreData       0x0238b208 -[NSManagedObjectContext(_NSInternalChangeProcessing) _processRecentChanges:] + 1352 
15 CoreData       0x023c4e55 -[NSManagedObjectContext save:] + 149 
16 Score Card       0x000053ad -[TimeRun saveAction] + 65 
17 Score Card       0x00004116 -[TimeRun countDown] + 326 
18 Foundation       0x000561c9 __NSFireTimer + 125 
19 CoreFoundation      0x02642f73 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 19 
20 CoreFoundation      0x026445b4 __CFRunLoopDoTimer + 1364 
21 CoreFoundation      0x025a0dd9 __CFRunLoopRun + 1817 
22 CoreFoundation      0x025a0350 CFRunLoopRunSpecific + 208 
23 CoreFoundation      0x025a0271 CFRunLoopRunInMode + 97 
24 GraphicsServices     0x02f4000c GSEventRunModal + 217 
25 GraphicsServices     0x02f400d1 GSEventRun + 115 
26 UIKit        0x002ceaf2 UIApplicationMain + 1160 
27 Score Card       0x00002998 main + 102 
28 Score Card       0x00002929 start + 53 
) 
terminate called after throwing an instance of 'NSException 

我只是不知道如何解決這個問題。我沒有插入任何部分，所以我在這裏輸了。想法？

編輯：

是否有與我怎麼了我的獲取結果呢？看來我使用部分名稱的關鍵，但我不希望部分：

- (NSFetchedResultsController *)fetchedResultsController { 

    if (fetchedResultsController != nil) { 
     return fetchedResultsController; 
    } 

    NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; 
    NSEntityDescription *entity = [NSEntityDescription entityForName:@"Mission" inManagedObjectContext:managedObjectContext]; 
    [fetchRequest setEntity:entity]; 

    // Create the sort descriptors array. 
    NSSortDescriptor *startDescriptor = [[NSSortDescriptor alloc] initWithKey:@"title" ascending:YES]; 
    NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:startDescriptor, nil]; 
    [fetchRequest setSortDescriptors:sortDescriptors]; 

    // Create and initialize the fetch results controller. 
    NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:managedObjectContext sectionNameKeyPath:@"title" cacheName:@"Root"]; 
    self.fetchedResultsController = aFetchedResultsController; 
    self.fetchedResultsController.delegate = self; 

    // Memory management. 
    [aFetchedResultsController release]; 
    [fetchRequest release]; 
    [startDescriptor release]; 
    [sortDescriptors release]; 

    return fetchedResultsController; 

}//end 

Answer 1

設置sectionNameKeyPath：至零已解決我的問題。

Answer 2

他們說你刪除的應用在你的模擬器則「清理所有的建設目標」，然後重新生成並重新運行。希望這有助於

我根據我的答案上： 'NSInternalInconsistencyException'

Answer 3

這告訴你你的問題：

無效更新：的 部分無效號碼。包含在表視圖 更新後段 的數目（1）必須等於包含在表部分的數量 更新（1）之前 視圖，加上或 減去區間的數目插入 或刪除（1插入，0刪除）。

更新後，您從'numberOfSectionsInTableView：`返回不正確的節數。很可能，更新中的某些內容會更改這些部分，但您不斷返回舊部分編號計數。

Answer 4

如果你仍然想下面的代碼段name.The作品：

- (void)controller:(NSFetchedResultsController *)controller didChangeSection:(id <NSFetchedResultsSectionInfo>)sectionInfo 
     atIndex:(NSUInteger)sectionIndex 
forChangeType:(NSFetchedResultsChangeType)type{ 
switch(type) 
    { 
    case NSFetchedResultsChangeInsert: 
     [self.tableView insertSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade]; 
     break; 

    case NSFetchedResultsChangeDelete: 
     [self.tableView deleteSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade]; 
     break; 
    default: 
     break; 
    } 
}