Re: Accessor methods and (auto)release: conclusion
Re: Accessor methods and (auto)release: conclusion
- Subject: Re: Accessor methods and (auto)release: conclusion
- From: Bill Cheeseman <email@hidden>
- Date: Tue, 06 Aug 2002 18:00:56 -0400
on 02-08-06 3:57 PM, Ondra Cada at email@hidden wrote:
>
Particularly, I am afraid the difference between owned (like window title)
>
and referenced (like window delegate) object is very important, and not
>
stressed out enough in Cocoa (the more so since for both are often used
>
the very same operations).
>
>
With this distinction on mind, it should be emphasized we are speaking of
>
accessors to owned objects here.
This is a helpful distinction to me.
Recently, I was playing with the Cocoa text system and reached the point
where I had a pointer to my textview's NSTextStorage object. I made a setter
and getter for my reference to it, but then I thought that my setter
probably shouldn't retain and release per the usual setter pattern because I
don't own the NSTextStorage -- I just have a reference or pointer to it, for
my convenience.
The text system documentation says that when I release an NSTextStorage
object, the text system will release its NSLayoutManagers and
NSTextContainers and I think its NSTextViews. So I suppose I can't retain
and release without disrupting my text system. After releasing it, I suppose
I would have to build the whole system back up again properly.
I give this as an example of the confusion that accessor theory and memory
management can bring to a relative beginner. What is the answer for
NSTextStorage? When I'm just pointing to it, I shouldn't retain and release
in a convenience setter, is this right?
--
Bill Cheeseman - email@hidden
Quechee Software, Quechee, Vermont, USA
http://www.quecheesoftware.com
The AppleScript Sourcebook -
http://www.AppleScriptSourcebook.com
Vermont Recipes -
http://www.stepwise.com/Articles/VermontRecipes
Croquet Club of Vermont -
http://members.valley.net/croquetvermont
_______________________________________________
cocoa-dev mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/cocoa-dev
Do not post admin requests to the list. They will be ignored.