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

Question

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

question from:https://stackoverflow.com/questions/11706254/nsinternalinconsistencyexception-reason-attempt-to-insert-row-0-into-section

Answer 1

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)

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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];