Re: Regarding MVC design pattern
Re: Regarding MVC design pattern
- Subject: Re: Regarding MVC design pattern
- From: Kyle Sluder <email@hidden>
- Date: Thu, 20 May 2010 06:41:57 -0700
On Thu, May 20, 2010 at 5:44 AM, Joanna Carter
<email@hidden> wrote:
> Le 20 mai 2010 à 13:24, Alexander Spohr a écrit :
> Yes, because the ivar is synthesised, addressing myFoo would send the release message to the property, which is not recommended.
No. "Send the release message to the property" is a meaningless
phrase. Only objects can receive release messages, and the property
accessor returns the same address that is stored in the ivar, so the
same object would receive the -release message. Also, property
accessors are only called with either dot or method syntax; plain old
`myFoo = bar` will not call -setFoo:.
> Apparently, self->myFoo is capable of reaching the synthesised ivar.
Alexander is correct that plain old `myFoo` will also access the
synthesized ivar. There used to be a GCC bug in which synthesized
ivars were inaccessible (at least through self-> syntax; now I can't
recall whether they were wholly inaccessible). That, combined with the
fact that there is no declaration of the ivar in scope, has led me to
always use self-> syntax. I can't even recall seeing it documented
that @synthesize myFoo; puts the myFoo symbol in scope; if it has ever
been documented, I can't find it now.
--Kyle Sluder
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