Casting objects in NSCountedSet
Casting objects in NSCountedSet
- Subject: Casting objects in NSCountedSet
- From: Koen van der Drift <email@hidden>
- Date: Tue, 24 Sep 2013 11:38:50 -0400
In my app I am using a 3rd party framework, and I have subclassed (objB) one of the classes (objA) for additional functionality.
At one point I am getting an NSCountedSet from the framework with objects objA. When I enumerate these, I'd like to cast them as objB, to access the additional functionality (doSomethingNew). But whatever I try, the objects are always casted as objA.
NSCountedSet *cs = [framework countSymbols];
for (objB *obj in cs)
{
NSDictionary *ec = [objB doSomethingNew]; <<== throws error, because objA doesn't know about doSomethingNew
// etc
}
or:
NSCountedSet *cs = [framework countSymbols];
for (id *obj in cs)
{
NSDictionary *ec = [((ObjB*) obj) doSomethingNew]; <<== throws error, because objA doesn't know about doSomethingNew
// etc
}
Is it possible what I am trying to do?
- Koen.
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