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Re: Why shouldn't I release?
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Re: Why shouldn't I release?


  • Subject: Re: Why shouldn't I release?
  • From: Frank Weinstock <email@hidden>
  • Date: Fri, 30 Nov 2007 22:40:18 -0500


On Nov 30, 2007, at 10:06 PM, Ric L. wrote:





CC: email@hidden
From: email@hidden
To: email@hidden
Subject: Re: Why shouldn't I release?
Date: Fri, 30 Nov 2007 18:58:59 -0800


On Nov 30, 2007, at 6:54 PM, Ric L. wrote:

By my reckoning, stringWithFormat should create a string with a
retain count of 1.


Why do you say that? Before you answer, refer to the memory management
policies here:


<http://developer.apple.com/documentation/Cocoa/Conceptual/ MemoryMgmt/Concepts/ObjectOwnership.html

Well, after I wrote the message, I added a line:

    long retainCount = [outputString retainCount];

after the call to stringWithFormat and saw that it had a retain count of 1 - this would seem to settle the issue that I am correct on this point at least.

However, thanks for the pointer to the site, I will take a close look at it.

True, it has a retain count of 1--if it had a retain count less than 1 it would have already been deallocated. stringWithFormat autoreleases the string, so it can be released when the autorelease pool is flushed. But, you've already released it by then (causing it already to be deallocated); and the deallocated object being released causes the crash.


Frank

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Frank Weinstock
Interim Associate Dean for Academic Affairs
Director of Graduate Studies
College-Conservatory of Music
University of Cincinnati
email@hidden



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Frank Weinstock
Interim Associate Dean for Academic Affairs
Director of Graduate Studies
College-Conservatory of Music
University of Cincinnati
email@hidden



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References: 
 >Why shouldn't I release? (From: Ric L. <email@hidden>)
 >Re: Why shouldn't I release? (From: j o a r <email@hidden>)
 >RE: Why shouldn't I release? (From: Ric L. <email@hidden>)

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