Can I put different types of objects in the same NSMutableArray?

Question

I have classes A and B.
Can I put these classes in the same NSMutableArray without problems in future?

Example:

NSMutableArray *maincoll = [[NSMutableArray alloc] init];
ClassA *ca = [[classA alloc] init];
ClassB *cb = [[classB alloc] init];
//here is case
[maincoll addObject:ca];
[maincoll addObject:cb];
...

Answer 1

Yes. No limitations. The only thing you have to be careful of is when you retrieve items from the array to verify their class (if necessary) before starting to use them.

Answer 2

Yes.

This may be the shortest answer I've ever posted.