Re: self
Re: self
- Subject: Re: self
- From: Andy Lee <email@hidden>
- Date: Wed, 8 Jun 2005 11:35:22 -0400
On Jun 8, 2005, at 10:59 AM, Theodore H. Smith wrote:
Am I right in thinking that self is a local (stack based) variable?
It is an implicit argument to every method, so yes it is local (i.e.,
its scope is the method) and yes it is stack-based. Technically you
can treat it like any other method argument, including setting it to
whatever value you want. You should almost never do this outside of
an init method, because it can make your code confusing and error-
prone to have "self" not be the original receiver of the method.
Some people feel init methods are a special case because of their
unique semantics -- hence this idiom:
- (id)init {
if ((self = [super init]))
{
// ...
}
return self;
}
for example the code:
-(id) init {
self = [self initSpecial];
return self;
}
should alter everything in exactly the same way as:
-(id) init {
return [self initSpecial];
}
Yes, those two code examples have identical effects.
--Andy
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| References: | |
| | >self (From: "Theodore H. Smith" <email@hidden>) |