Re: Newbie: Cannot use object as a parameter to a method
Re: Newbie: Cannot use object as a parameter to a method
- Subject: Re: Newbie: Cannot use object as a parameter to a method
- From: Christopher Behm <email@hidden>
- Date: Thu, 22 Apr 2004 15:48:48 -0400
Your function for the NSString version is incorrect, you must indicate that it's a pointer
- (NSString*)rollAsString;
(and the same for the actual method)
- (NSString*) rollAsString
{ ... }
Hope that helps :)
Chris
On Thursday, April 22, 2004, at 03:04PM, Michael S. Tashbook <email@hidden> wrote:
>
> On 22 Apr 2004, at 19:07, Michael S. Tashbook wrote:
>
> > I'm trying to create a simple class that represents a six-sided die.
>
> > XCode keeps complaining about my rollAsInt method, which is just
>
> > supposed to return the value of the currValue instance variable (the
>
> > code below omits a similar method that returns the value as an
>
> > NSString,
>
> > which gives the same error message).
>
>
Hmmm... That's odd. Everything seems to work fine when I comment out the
>
*other* method in my class; I had previously omitted it because it
>
generated the same error message, and I figured that there was something
>
more general to blame.
>
>
Here are my two class source code files, in their entirety. When I
>
uncomment the rollAsString method, I get the original "Can not use an
>
object as a parameter to a method" error message.
>
>
As a side note, XCode also reports that rollAsString has an incompatible
>
return type. According to the O'Reilly book, the @"" form should
>
automatically create an NSString object, which is what the method is
>
declared to return. Did I miss a memo somewhere? ;)
>
>
Any ideas?
>
>
Mike
>
>
>
CWDie.h:
>
>
/* CWDie */
>
>
#import <Cocoa/Cocoa.h>
>
>
@interface CWDie : NSObject
>
{
>
int currValue;
>
}
>
>
- (void)roll;
>
- (int)rollAsInt;
>
- (NSString)rollAsString;
>
>
@end
>
>
>
CWDie.m:
>
>
#import "CWDie.h"
>
>
@implementation CWDie
>
- (void)roll
>
{
>
currValue = (rand() % 6) + 1;
>
NSLog(@"Rolled a %d.\n", currValue);
>
}
>
>
- (int)rollAsInt
>
{
>
return currValue; // XCode reports the error here
>
}
>
>
>
- (NSString)rollAsString
>
{ // XCode reports the error here
>
return @"foo"; // Just a placeholder statement for now
>
}
>
>
@end
>
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