Accessing objects using NSPointerArray?

Question

I have an NSPointerArray and in one of my methods, I want to access the objects stored in that NSPointerArray (as I have to use one of the object's properties). I don't want to create a new NSArray with the allObjects method as that will be redundant in my program. Right now, I'm doing the following which uses a lot of memory? (Sorry, I'm a noob).

-(void) print
{
    for (int i=0; i<[list count]; i++){
        NSLog(@"%@",[((__bridge Song*)[list pointerAtIndex: i])  title]);
    }
}

Thanks

Why would this use a lot of memory? This seems like the most economical way of doing what you need (in terms of memory use) because no new objects get created. — Sergey Kalinichenko, Aug 16 '12 at 23:56
I was a little doubtful about that. But now I got it. Thanks — Abhishek Khanna, Aug 17 '12 at 15:29

score -1 · Answer 1 · answered Apr 23 '14 at 15:01

-1

It looks like your problem is already solved. Wanted to mention its easier to loop over your NSPointerArray with a foreach loop. In this case you do it like this:

-(void) print {
    for (Song *s in list){
        NSLog(@"%@", [s title]);
    }
}

This way you can concentrate on the object instead of using the integer of your loop.

answered Apr 23 '14 at 15:01

Alex Cio

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`NSPointerArray` does not support `NSEnumeration` nor `NSFastEnumeration`. Therefore you cannot iterate using the `for(... in ...)` syntax. – tomacco Aug 16 '18 at 13:59
NSPointerArray does not conform to sequence – NaXir May 21 '19 at 09:22
NSPointer now conforms to NSFastEnumeration https://developer.apple.com/documentation/foundation/nspointerarray – PaulWoodIII Aug 30 '19 at 15:59

Accessing objects using NSPointerArray?

1 Answers1