Re: even after the longish diatribes on copying....
Re: even after the longish diatribes on copying....
- Subject: Re: even after the longish diatribes on copying....
- From: Marcel Weiher <email@hidden>
- Date: Mon, 14 Jun 2004 16:17:17 +0100
NSString *fName;
- (NSString *)fName;
- (void)setFName:(NSString *)aFName;
@implementation Person
- (NSString *)fName { return fName; }
- (void)setFName:(NSString *)aFName
{
if (fName != aFName) {
[fName release];
fName = [aFName retain];
}
}
@end
so that in the Controller class I am creating a person
currentPerson = [[Person alloc] init];
OK.
what I want to do is...
duplicateOfPerson = [currentPerson copy];
For that you need an implementation of a copyWithZone: method:
We need to see your implementation of -copy(WithZone:)in order to help
you.
I want a deep copy.
Then implement that in your -copy method
What I get is a shallow copy.
I am surprised you are not getting a DNU, since you don't seem to be
implementing -copy.
Maybe you are inheriting from a superclass that implements copy as
retain?
I guess I could just create a method that allocs
another Person and then uses the setter methods to
populate the variables.
Well, that is probably exactly what you will end up doing in your copy
method.
But I thought I would use a 'copy'.
?
I have been reading all the docs but I just don't get
it.
Maybe you are missing the fact that -copy is something you have to
implement?
Cheers,
Marcel
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