When one object creates another, it’s
sometimes a good idea to make sure
they’re both allocated from the same
region of memory. The zone method
(declared in the NSObject protocol)
can be used for this purpose; it
returns the zone where the receiver is
located.
This suggests to me that your ivars, and any objects your classes “create” themselves could make use of +allocWithZone: in this way, to make the instances they create in the same zone.
-(id)init {
if (self = [super init]) {
someIvar = [[SomeOtherClass allocWithZone:[self zone]] init];
}
return self;
}