Re: Copying id
Re: Copying id
- Subject: Re: Copying id
- From: Ken Thomases <email@hidden>
- Date: Sun, 10 Aug 2008 02:34:23 -0500
On Aug 10, 2008, at 2:05 AM, Mike wrote:
How does one go about copying an object specified by id when one
doesn't know the object type and the object does not implement
NSCopying protocol?
The short answer is: you don't. If an object's class doesn't
implement NSCopying, then there are no known semantics for what making
a copy of it should mean. Just to pick a random example, what might
it mean to copy an NSTask object? Or an NSThread? I could keep
going, of course.
However, I'm having a hard time imagining under what circumstances you
would want to do this. If you don't know what kind of object you
have, and the object itself doesn't know how to make a copy, why do
you want (or think you need) to make a copy?
Cheers,
Ken
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| | >Copying id (From: Mike <email@hidden>) |