Re: adding new objects to a model within an object

[Andrew Boyd]

Hi,
  Thanks, that seems to make it work.  

Andy Boyd
UT Soutwestern Medical Center

<<< Ken Cline <address@hidden>  7/20  6:33p >>>

On Tue, 20 Jul 1999, Andrew Boyd wrote:

> Hi,
>    I am a newbie,  I have been searching for an answer to I think is a simple 
> question but have not had any luck.  I am writing a program will the major 
> object is a Cell.  In CellModelSwarm.m I have function that I have tried to 
> write that will create a new cell.  I am trying to have the swarm object Cell 
> call the function in CellModelSwarm to make a new object.
> 
> In CellModelSwarm.h after the interface {}
> - addCell:  (Cell *)cll;
> In CellModelSwarm.m
> 
> - addCell: (Cell *)cll
> {  
>   cll = [Cell createBegin: self];
>   [cellList addLast: cll];
>   return self;
> }
> In Cell.h 
> @interface {
>   id cellModelSwarm;
> }
> In Cell.m
> [cellModelSwarm addCell: newCell];
> 
> I have tried to model this off of the heatBug addHeatBug and the U of M 
> HeatBugPlus.  I am not sure if I am calling the function of addCell 
> improperly or I have not figured out what type of variable I need to pass to 
> the function, i have tried a few different things.  I have tried specifing 
> super (as in Objective C code of calling a superclass), but that does not 
> seem to work in swarm.  
> 
> The error I get when I try to compile is:
>  Cell.m: In function `-[Cell step]':
> Cell.m:50: warning: cannot find method.
> Cell.m:50: warning: return type for `addCell:' defaults to id
> make: *** [Cell.o] Error 1
> 
> However when I call other functions within CellModelSwarm it seems to 
> compile.  

Have you tried importing the "CellModelSwarm.h" file into
Cell.m?

This may cause its own problems, eg cyclic imports, depending
on what else you import, but I'd try that first.


Ken.


_________________________________________________________
Ken Cline                             address@hidden
SAIC                                 VOICE (410) 571-0413
Annapolis, MD                          FAX (301) 261-8427



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