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Re: Accessor methods and (auto)release <Memory trail>

Method 1: The following pair is good if performance of "get" is important (say you expect it to be called it thousands of times a second):

- (NSString *) title {
return title;
}

- (void) setTitle: (NSString *)newTitle {
[title autorelease];
title = [newTitle copy]; // or retain, depending on object & usage
}

(as an optimization, you can do "if (title != newTitle)" in the set method).


Method 2: Otherwise use the following pair, where the return value is autoreleased in the scope of the caller, which is more correct. This is also more (but not fully) thread-safe as the returned value is autoreleased in the calling thread.

- (NSString *) title {
return [[title retain] autorelease];
}

- (void) setTitle: (NSString *)newTitle {
if (title != newTitle) {
[title release];
title = [newTitle copy]; // or retain, depending on object & usage
}
}


Ali
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References: 
 >Accessor methods and (auto)release <Memory trail> (From: Raphaël Delcroix <email@hidden>)



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