insomiac insomiac - 1 month ago 18
iOS Question

NSInternalInconsistencyException', reason: 'attempt to insert row 0 into section 0, but there are only 0 rows in section 0 after the update'

I am using UITableViewController and getting this error while updating tableView. Below is my code:

This occurs when i do a click event:

[timeZoneNames insertObject:@"HELLO" atIndex:0];
[self.tableView beginUpdates];
NSArray *insertIndexPaths = [NSArray arrayWithObject:[NSIndexPath indexPathForRow:0 inSection:0]];
[self.tableView insertRowsAtIndexPaths:insertIndexPaths withRowAnimation:UITableViewRowAnimationTop];
[self.tableView endUpdates];


I tried looking for apple documentation but that didnt helped.

Thanks,
Aby

Answer

I've ran into this problem before. It means that when -insertRowsAtIndexPaths:withRowAnimation: was called -tableView:numberOfRowsInSection: returned 0. You need to insert into the model before you call -insertRowsAtIndexPaths:withRowAnimation: (see: -beginUpdates)


Update

I wonder what the return value of -tableView:numberOfRowsInSection: is? Also, you don't need -beginUpdates/-endUpdates if you only have one update.

[timeZoneNames insertObject:@"HELLO" atIndex:0];
// Let's see what the tableView claims is the the number of rows.
NSLog(@"numberOfRowsInSection: %d", [self tableView:self.tableView numberOfRowsInSection:0]);
NSArray *insertIndexPaths = [NSArray arrayWithObject:[NSIndexPath indexPathForRow:0 inSection:0]];
[self.tableView insertRowsAtIndexPaths:insertIndexPaths withRowAnimation:UITableViewRowAnimationTop];
Comments