Question

So I have this class called a Cell which is a subclass of CCSprite then I have three other subclasses of Cell.

In one of the subclasses I am overriding a method called addCellToCell in class Cell:

-(void)addCellToCell:(id)_cell;

And I am trying to do this:

    self = [CCSprite spriteWithFile:@"Jet.png"];
    [self setPosition:ccp(_cell.position.x+5, _cell.position.y)];

Where I am trying to set the object self‘s position (which since it is inheriting from Cell it makes it essentially a modified CCSprite) relative to another Cell subclassed object (potentially from any one of the three subclasses).

But when I do this I get the error:

request for member ‘position’ in ‘_cell’, which is of non-class type ‘objc_object*’

It also suggest I use “->” instead of “.” so I change it to that:

‘struct objc_object’ has no member
named ‘position’

Sorry if it is confusing… Please ask for any clarification if you need some. How can I fix these errors?

Definition of Cell class:

@interface Cell : CCSprite {
}

-(void)addToCell:(id)_cell;

@end

Answer 1

Cast it to Cell object before using it,

Cell aCell = (Cell *)_cell;

and then

[self setPosition:ccp(aCell.position.x+5, aCell.position.y)];