Re: [NSView removeFromSuperview] not affecting retain count
Re: [NSView removeFromSuperview] not affecting retain count
- Subject: Re: [NSView removeFromSuperview] not affecting retain count
- From: mmalcolm crawford <email@hidden>
- Date: Mon, 20 Dec 2004 12:15:53 -0800
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
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