Question

I’m doing this :

  for(int k=0;k<[dataWord count];k++)
     {
         NSNumber *num=[NSNumber numberWithInt:2] ;
         [preDataWord insertObject:num atIndex:k ];
     }

when preDataWord is allocated before .

later when I’m trying to use this array I get all zero’s.
Why is that? Do i have to retain it? How?

EDIT :
on my init i have preDataWord=[[NSMutableArray alloc]init];
where preDataWord is declared in the class interface .
this class is running in another thread(audio unit) .
when i log the array right after the for loop, i can see its full and just fine.
later when another function trying to use it, she sees 0….

Answer 1

Without seeing the preDataWord ivar I’d first make sure it’s declared and allocated properly:

//creates empty mutable array ...
NSMutableArray preDataWord = [NSMutableArray array]; 

And inside your for loop, add your NSNumber object to preDataWord like so:

[preDataWord addObject:num];