Re: [NSView removeFromSuperview] not affecting retain count

FROM : mmalcolm crawford
DATE : Mon Dec 20 21:15:53 2004

On Dec 20, 2004, at 11:04 AM, Julian Pellico wrote:

>> Why do you check this in the first place? Do you suspect that there is
>> a leak? What made you suspicious of that? Have you tracked it with
>> ObjectAlloc?

> Of course; otherwise I wouldn't be printing out retain counts. I do
> exactly these things with the MyView:
> - allocate a MyViewController which contains a MyView
> - add the MyViewController to an array
> - release the MyViewController
> - make the MyView a subview of another custom view
> - call removeFromSuperview on the MyView
> - remove the MyViewController from the array
> The MyViewController gets dealloc'ed, but the MyView doesn't.
>

There are several places here where you might be making a mistake in
memory management.  Does your MyViewController retain the MyView?  If
so, does it retain it in addition to alloc-ing it? Does it release it
in its dealloc method?

>> My advice is always that you shouldn't try to track retain count like
>> that. What if it's autoreleased?

> It would hardly be safe for the frameworks to autorelease it. I might
> want that NSView well past the end of the run loop.
>

It's not clear in what sense this would be unsafe.  It would be
perfectly reasonable for a view removed from a superview to be
autoreleased rather than released -- see John's reply (Dec 20, 2004, at
11:50 AM).

mmalc