There are no temporary objects created during fast enumeration, you just get a
reference to one of the objects in the thing you are enumerating.
[ array objectAtIndex:i ] doesn't create temporaries either.
On Apr 16, 2012, at 5:42 PM, Patrick Robertson wrote:
> Hi all,
>
> I've searched the web, but can't seem to find any concrete information on
> how fast enumeration loops manage temporarily created objects.
> Would anybody be able to shine some light on whether fast enumeration
> itself takes care of the objects it creates?
>
> So, for example in:
>
> for (id anObject in anArray) {
> // do some stuff
> }
>
> I'm assuming that the fast enumeration loop itself does something like this
> behind the scenes for each object in the array:
> id anObject = [anArray objectAtIndex:i]
>
> so are these temp objects created during the enumeration released
> automatically at the end of the loop, or is it work wrapping the whole
> thing in an autoreleasepool?
>
> @autoreleasepool {
> for (id anObject in anArray) {
> // do some stuff
> }
> }
>
> Thanks
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