Question

hii every one

i am using following code to delete a row in the rgouped table view

- (void)tableView:(UITableView *)tv commitEditingStyle:(UITableViewCellEditingStyle)editingStyle 
forRowAtIndexPath:(NSIndexPath *)indexPath {

    if(editingStyle == UITableViewCellEditingStyleDelete) {

        //Get the object to delete from the array.
        insertUpdateDelete *objInsertUpdateDelete = [appDelegate.arrObjects objectAtIndex:indexPath.row];
        [appDelegate DeleteRecord:objInsertUpdateDelete];

        //Delete the object from the table.
        [tableView1 deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
    }
}


    }

but its crashing at the line

[tableView1 deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];

crash log is:

2011-05-20 19:21:20.233
iICS[10744:207] * Assertion failure
in -[UITableView
_endCellAnimationsWithContext:], /SourceCache/UIKit_Sim/UIKit-1448.89/UITableView.m:995
2011-05-20 19:21:20.235 iICS[10744:207]

 *** 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 (3)
must be equal to the number of rows
contained in that section before the
update (3), plus or minus the number
of rows inserted or deleted from that
section (0 inserted, 1 deleted).’

can any buddy help me? thanx in advance

Answer 1

Make sure that your data source is reflecting the changes you are making before calling deleteRowsAtIndexPaths:. I see that you are calling [appDelegate DeleteRecord:objInsertUpdateDelete]; but if your data source is not getting its records directly from the appDelegate and getting them from maybe an array in your class you also need to remove it from that array.

As a side note your design pattern for using the app delegate may be like a “ball of mud”. Is it good practice to use AppDelegate for data manipulation and Handling?