错误试图从UITableView中

Question

删除单元格当我尝试从我UITableView删除单元格它给了我这个错误：

*** Assertion failure in -[UITableView _endCellAnimationsWithContext:], /SourceCache/UIKit_Sim/UIKit-1912.3/UITableView.m:1046 2012-08-02 16:35:13.941 jsontest2[1551:f803] *** 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 (4) must be equal to the number of rows contained in that section before the update (4), plus or minus the number of rows inserted or deleted from that section (0 inserted, 1 deleted) and plus or minus the number of rows moved into or out of that section (0 moved in, 0 moved out).' *** First throw call stack: (0x13e0052 0x1571d0a 0x1388a78 0x9c02db 0xbb518 0xc6211 0xc623f 0x2ce9 0xd289d 0x226d70 0x13e1ec9 0x3a5c2 0x3a55a 0xdfb76 0xe003f 0xdf2fe 0x5fa30 0x5fc56 0x46384 0x39aa9 0x12cafa9 0x13b41c5 0x1319022 0x131790a 0x1316db4 0x1316ccb 0x12c9879 0x12c993e 0x37a9b 0x1c22 0x1b95) terminate called throwing an exception**

这里是我的代码：

- (void)tableView:(UITableView *)tableView 
commitEditingStyle:(UITableViewCellEditingStyle)editingStyle 
forRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    [tabela beginUpdates]; 
    if (editingStyle == UITableViewCellEditingStyleDelete) 
    { 
     // Get the TAG and ID of Bill to delete 
     //UITableViewCell * cell = [self tableView:tabela cellForRowAtIndexPath:indexPath]; 
     //NSLog(@"%d", cell.tag); 

     [tabela deleteRowsAtIndexPaths:[NSArray arrayWithObjects:indexPath, nil] withRowAnimation:YES];  

    } 

    [tabela endUpdates]; 
    [tabela reloadData]; 

} 

感谢帮帮我！

编辑

self.billsArray = [[NSMutableArray alloc] init];
self.billsArray = [resultsDictionary objectForKey:@"bills"];

Answer 1

在您的billsArray中，确保并删除相应的被删除对象。

[billsArray removeObjectAtIndex:indexPath.row]; 

下面是从输出提示：

The number of rows contained in an existing section after the update (4) must be equal to the number of rows contained in that section before the update (4), plus or minus the number of rows inserted or deleted from that section (0 inserted, 1 deleted) and plus or minus the number of rows moved into or out of that section

所以你的UITableView是相当多说：

"Ok, I have 20 rows (which comes from [billsArray count]. Now I'm suppose to delete one row which means I should have 19 rows total....But my delegate is saying I should have 20 rows...Whhhattt dooo I dooo??? .....crash " - UITableView

所以一定要确保从数据数组中删除的对象，只要你删除一行。 或如果您添加一行，请确保将其添加到您的数据数组中。编辑： （回应OP编辑）。

这是你的问题。

self.billsArray = [resultsDictionary objectForKey:@"bills"]; 

这创建了一个只读数组。

你需要做的是这样的：

self.billsArray = [[NSMutableArray alloc] initWithArray:[resultsDictionary objectForKey:@"bills"]]; 

或者

self.billsArray = [NSMutableArray arrayWithArray:[resultsDictionary objectForKey:@"bills"]]; 

或者你可以做（​​不干净的方法）：

NSMutableArray *temp = [resultsDictionary objectForKey:@"bills"]; 
self.billsArray = [temp mutableCopy]; 

Answer 2

如果您的表只有一个部分，你可以在某个地方的方法调用[billsArray removeObjectAtIndex:[indexPath row]]，假设billsArray是NSMutableArray，而不是一个NSArray。如果不是，则可以将其更改为一个，或将其内容复制到新的NSMutableArray中，然后将该数组用作表数据源。