Re: Private copy not working correctly
Re: Private copy not working correctly
- Subject: Re: Private copy not working correctly
- From: Joe Turner <email@hidden>
- Date: Fri, 03 Jul 2009 10:17:00 -0500
Thanks, this seems to work perfectly!
I recently read about shallow and deep copies, but didn't see the
initWithDictionary:copyItems: method.
Thanks,
Joe
On Jul 2, 2009, at 6:51 PM, Adam R. Maxwell wrote:
On Jul 2, 2009, at 12:05 PM, Joe Turner wrote:
I'm trying to create a private copy of an object, but yet when the
original changes, my copy changes too.
I have an array of dictionaries called spacesData. Then, when I do:
NSDictionary *backup = [[spacesData objectAtIndex:index] copy];
everything is fine, and this one looks as it should. Then, when I
change something in spacesData objectAtIndex:index], this private
copy changes too. Doesn't "copy" create a private copy, or am I
doing something wrong?
Copying a collection makes a shallow copy, so only the collection
itself is copied, not the values that it contains. If you want to
copy values, check out -[NSDictionary
initWithDictionary:copyItems:], or CFPropertyListCreateDeepCopy().
--
Adam
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