Apple

Bye and have a nice day!

El 11/01/2009, a las 2:31, Robert Tillyard escribió:

Hello,

That's because self (i.e. Controller) doesn't respond to showRandom, only RandomGenerator does.

You need to initialise and use the RandomGenerator class.

This is written in e-mail so probably has typo's
i.e.

Controller.h****************
#import <Cocoa/Cocoa.h>
#import <RandomGenerator.h>

@class RandomGenerator;

@interface Controller : NSObject
{
   IBOutlet NSTextField *Text_field;

   RandomGenerator *generator;
}
- (IBAction)showRandom:(id)sender;
@end
Controller.m****************
#import "Controller.h"
#import "RandomGenerator.h"
@implementation Controller

- (void)init
{
   if ((self = [super init])))
   {
// assuming you have an init method in Random Generator...
   generator = [[RandomGenerator] alloc] init];
   }
   return (self);
}

- (void)dealloc
{
[generator release];

[super dealloc]
}

- (IBAction)showRandom:(id)sender
{
[Text_field setIntValue:[generator randomNumber:115]];
}
@end

Regards, Rob.

On 11 Jan 2009, at 01:19, Angel Manuel Mariblanca Gonzalez wrote:

Hello!
I'm new developing for Mac, I'm starting, and I've got a problem with methods and class.
I have a class (RandomGenerator) that I created to be a random generator (obvious). This class have one method:

RandomGenerator.h****************
#import <Cocoa/Cocoa.h>
@interface RandomGenerator : NSObject
{
int range;
}
- (int)  randomNumber: (int) withRange;
RandomGenerator.m****************
@implementation RandomGenerator
- (int) randomNumber: (int) withRange
{
if (range<1)
{
return 0;
} else
{
int random_number=(random() % range)+1;
return random_number;
}
}
@end

I have another class (Controller) to control the rest of the program. I tried to use the method randomNumber in this class, but doesn't work.

Controller.h****************
#import <Cocoa/Cocoa.h>
@interface Controller : NSObject
{
   IBOutlet NSTextField *Text_field;
}
- (IBAction)showRandom:(id)sender;
@end
Controller.m****************
#import "Controller.h"
#import "RandomGenerator.h"
@implementation Controller
- (IBAction)showRandom:(id)sender
{
[Text_field setIntValue:[self randomNumber:115]];
}
@end

The message of error is:
warning:'Controller' may not respond to '-randomNumber'.
(Messages without a matching method signature will be assumed to return 'id' and accept '...' as argument).

What could be the cause of this error?
Thanks.