Question

I have my UITableView data organized such that the sections of the table are the array elements of a NSMutableArray. Each element itself is a NSMutablearray of NSMutableDictionary, representing the row of each section and the data for each row.

When I create this, I load all the data and create each section’s NSMutableArray, then add them one at a time to the “outer” NSMutableArray. I reference the rows by:

[[[objData objectAtIndex:indexPath.section] objectAtIndex:indexPath.row] objectForKey:@"name"]

and have had no problems doing this. I think the advantage here is I can have a variable number of sections, which I need, and a variable number of rows in each section, also a requirement.

I do, however, get an error when I try to add a row to a section.

[[objData objectAtIndex:0] addObject:[[NSMutableDictionary alloc] initWithObjectsAndKeys: objectID,@"id",nameVar,@"name",nil]];

doesn’t work. Is this the problem, or is there a problem with the way I’ve layed out the array? I’m thinking that the inner NSMutableArray is only alloted so much memory, but I would have thought the array is just an array of references and wouldn’t have that issue. I could be wrong – it isn’t the first time.

Thanks in advance for wrapping your head around this.

Answer 1

How are you intializing the array and the values inside it? I think you have an array that is not mutable.

Also an NSMutableArray has a variable size, calling initWithSize is completely unnecessary. The array will resize if it needs to.