Question

I have an MutableArray filled with values from a database:

NSMutableArray *objectsArray = [[NSMutableArray alloc] init];
for (int n=0; n<[self.array count]; n++) {
    [objectsArray addObject:[[self.array objectAtIndex:n] objectForKey:@"Name"]];
    [objectsArray addObject:[[self.array objectAtIndex:n] objectForKey:@"Name_En"]];
}

I show the values on labels like so:

cell.textLabel.text = [[[dic objectForKey:@"d"] objectAtIndex:indexPath.row] objectForKey:@"Name"];
cell.detailTextLabel.text = [[[dic objectForKey:@"d"] objectAtIndex:indexPath.row] objectForKey:@"Name_En"];

So far the app works fine. It starts without throwing an exception and the values are in the labels. But if I start to scroll the app crashes and I get the following error:

Terminating app due to uncaught exception 'NSRangeException', reason: '-[__NSCFArray objectAtIndex:]: index (5) beyond bounds (5)'

Why is this error occurring?

Answer 1

You are probably saying the table that you have 6 rows, but you actually have 5. The reason for this exception is that the table view asks for cell for indexPath.row with value of 5, which means it thinks that there are 6 [0:5] rows, but your array in the dictionary has 5 items [0:5).