13

当我从表中删除行时，我的应用程序崩溃了。这是我检测到错误和堆栈跟踪的来源。谢谢！

//delete row from database
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSLog(@"\ncommitEditingStyle");

    //delete user from Users table with specified ID
    if(editingStyle == UITableViewCellEditingStyleDelete) 
    {

        //Get the object to delete from the array.
        [dbManager open: @DB_FILE_NAME];    

        //get userID from array usersIDList[row] = userID!
        NSNumber *usersID = [usersIDList objectAtIndex: [indexPath row]];
        [dbManager deleteUserWithID: [usersID intValue] table: @TABLE_USERS fieldName: @"UserID" ];

        [dbManager close];

        //Delete the object from the table.
        [self.tableView deleteRowsAtIndexPaths:
         [NSArray arrayWithObject: indexPath] 
        withRowAnimation: UITableViewRowAnimationFade];
    }
}

- (void)deleteRowsAtIndexPaths:(NSArray *)indexPaths withRowAnimation:(UITableViewRowAnimation)animation
{
    NSLog(@"\ndeleteRowsAtIndexPaths");
}

[Session started at 2010-11-15 18:01:23 +0200.]
2010-11-15 18:01:25.052 PhoneBook[12397:207] ******* Accessibility Status Changed: On
2010-11-15 18:01:25.101 PhoneBook[12397:207] ********** Loading AX for: com.yourcompany.PhoneBook ************
2010-11-15 18:01:30.060 PhoneBook[12397:207] 
deleteBtnUserClick
2010-11-15 18:01:31.878 PhoneBook[12397:207] 
commitEditingStyle
2010-11-15 18:01:31.881 PhoneBook[12397:207] *** Assertion failure in -[UITableView _endCellAnimationsWithContext:], /SourceCache/UIKit_Sim/UIKit-1262.60.3/UITableView.m:920
2010-11-15 18:01:31.883 PhoneBook[12397:207] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid update: invalid number of rows in section 0.  The number of rows contained in an existing section after the update (6) must be equal to the number of rows contained in that section before the update (6), plus or minus the number of rows inserted or deleted from that section (0 inserted, 1 deleted).'
*** Call stack at first throw:
(
    0   CoreFoundation                      0x02510b99 __exceptionPreprocess + 185
    1   libobjc.A.dylib                     0x0266040e objc_exception_throw + 47
    2   CoreFoundation                      0x024c9238 +[NSException raise:format:arguments:] + 136
    3   Foundation                          0x000b8e37 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 116
    4   UIKit                               0x00338d37 -[UITableView(_UITableViewPrivate) _endCellAnimationsWithContext:] + 8719
    5   UIKit                               0x00328511 -[UITableView deleteRowsAtIndexPaths:withRowAnimation:] + 56
    6   UIKit                               0x0aaca8fc -[UITableViewAccessibility(Accessibility) deleteRowsAtIndexPaths:withRowAnimation:] + 74
    7   PhoneBook                           0x00003491 -[RootViewController tableView:commitEditingStyle:forRowAtIndexPath:] + 392
    8   UIKit                               0x0032596d -[UITableView(UITableViewInternal) animateDeletionOfRowWithCell:] + 101
    9   UIKit                               0x0aacde92 -[UITableViewCellAccessibility(SafeCategory) deleteConfirmationControlWasClicked:] + 62
    10  UIKit                               0x002be7f8 -[UIApplication sendAction:to:from:forEvent:] + 119
    11  UIKit                               0x00349de0 -[UIControl sendAction:to:forEvent:] + 67
    12  UIKit                               0x0034c262 -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 527
    13  UIKit                               0x0034ae0f -[UIControl touchesEnded:withEvent:] + 458
    14  UIKit                               0x002e23d0 -[UIWindow _sendTouchesForEvent:] + 567
    15  UIKit                               0x002c3cb4 -[UIApplication sendEvent:] + 447
    16  UIKit                               0x002c89bf _UIApplicationHandleEvent + 7672
    17  GraphicsServices                    0x02d6c822 PurpleEventCallback + 1550
    18  CoreFoundation                      0x024f1ff4 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 52
    19  CoreFoundation                      0x02452807 __CFRunLoopDoSource1 + 215
    20  CoreFoundation                      0x0244fa93 __CFRunLoopRun + 979
    21  CoreFoundation                      0x0244f350 CFRunLoopRunSpecific + 208
    22  CoreFoundation                      0x0244f271 CFRunLoopRunInMode + 97
    23  GraphicsServices                    0x02d6b00c GSEventRunModal + 217
    24  GraphicsServices                    0x02d6b0d1 GSEventRun + 115
    25  UIKit                               0x002ccaf2 UIApplicationMain + 1160
    26  PhoneBook                           0x000026ec main + 102
    27  PhoneBook                           0x0000267d start + 53
)
terminate called after throwing an instance of 'NSException'
4

5 回答 5

34

我以前见过这个，肯定是你忘记更新填满表格的数据源了。但是缺少那部分代码。造成这种情况的方法是

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    返回 ;
}
于 2010-11-15T16:20:03.343 回答
34

是的，问题出在方法中numberOfRowsInSection 所以，要留下麻烦，您应该：

  1. 在函数commitEditingStyle中从您的数组、数据库等中删除数据。
  2. 减少您当前的行数。
  3. [tableView beginUpdates];

  4. [self.tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject: indexPath] withRowAnimation:UITableViewRowAnimationFade];

  5. [tableView endUpdates];

一切都好！

于 2010-11-15T16:53:40.537 回答
7

更新 Swift 4.2

如果您要删除部分中的最后一行，则应删除整个部分而不是行。要做到这一点：

    tableView.beginUpdates()
    dataArray.remove(at: row)
    if tableView.numberOfRows(inSection: section) == 1 {
        tableView.deleteSections(IndexSet(integer: section), with: .automatic)
    }
    else {
        tableView.deleteRows(at: indexPath, with: .fade)
    }
    tableView.endUpdates()
于 2016-07-15T09:40:26.657 回答
5

从错误消息中非常清楚：

'无效更新：第0节中的行数无效。更新后现有节中包含的行数（6）必须等于更新前该节中包含的行数（6），加上或减去从该部分插入或删除的行数（0 插入，1 删除）。

您尝试删除的对象不会在您的数据源中被删除。
如果我假设您的 UITableViewDataSource 也使用 dbManager，那么您必须修复 dbManager 才能实际删除该对象。

于 2010-11-15T16:27:01.480 回答
2

我遇到了同样的错误，原因是我删除了表中的最后一行，而我的 numberOfSectionsInTableView 实现返回 rowsArray 计数为 0..

更改为最小 1 解决案例

于 2013-10-02T23:14:18.920 回答