Home/ Questions/Q 6204529
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-24T05:06:34+00:00

I have this code below. The thing is, each time I click on the

  • 0

I have this code below. The thing is, each time I click on the “SPIN” ccmenuitem, the program crashes with a “Program received signal: SIGABRT”

Here’s the output in the console:

2011-07-29 13:52:52.906 HelloWorld[1031:207] -[NSCFString shuffle]: unrecognized selector sent to instance 0x6833c90
2011-07-29 13:52:52.976 HelloWorld[1031:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSCFString shuffle]: unrecognized selector sent to instance 0x6833c90'

I don’t know what’s wrong, my

And here is my code.

`#import <Foundation/Foundation.h>
#import "cocos2d.h"

@interface GameScene : CCLayer {
    NSMutableArray * answersArray;    //holds all valid answers 
    NSMutableArray * lettersArray;    //holds placement of letters to display
    NSMutableArray * userAnswerArray; //holds user's answer to check and submit
    NSString * THEWORD;               //the word
}

+(id) scene;
....
- (void) spinWord;
- (void) playWord;


@end`

And this implementation:

`

@implementation GameScene

+(id) scene   {   ...    }
-(id) init
{
    if( (self=[super init])) {
         ...//everything is initialized
         [self initImages]
         ...
    }    
}
- (void) initImages
{
    ....
    CCMenuItem *menuItem1 = [CCMenuItemImage itemFromNormalImage:@"PLAYunselected.png" selectedImage:@"PLAYselected.png" target:nil selector:@selector(onPlayWord)];

    CCMenuItem *menuItem2 = [CCMenuItemImage itemFromNormalImage:@"SPINunselected.png" selectedImage:@"SPINselected.png" target:self selector:@selector(spinWord)];

    CCMenu *menu = [CCMenu menuWithItems:menuItem1, menuItem2, nil];
    [menu alignItemsHorizontally];
    menu.position = ccp(72, 198);
    [self addChild:menu z:2];

}
- (void) spinWord{
    //NSLog(@"%@",lettersArray);   <---if I uncomment this line, I get an EXC_BAD_ACCESS message instead
    [lettersArray shuffle];   // <--- this line causes the SIGABRT signal, even if it's initialized.
    NSLog(@"%@",lettersArray);
    ...
}

@end
`

Please help me out. Is this a memory management problem? If so, how do I fix it?

Thank you very much!

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    That error always means exactly what it reads like it means. You have sent a message to an object that does not understand that message (meaning the object does not have a method to handle such a request). This however can also mean you are sending a message to an object that does not exist.

    If you try to access a bad array index (or the index of an array that does not actually exist) you get bad access. If you try to access a method that does not exist, or a method of an object that does not exist, you get a unrecognized selector message.

    I do not see you allocating or initializing your arrays. I don’t know what shuffle is, you have not posted code for it. It may be a built in method for all I know. I am fairly certain that all you need to do is allocate and initialize your arrays.

    NSMutableArray * answersArray = [[NSMutableArray alloc] init];
// And so on with your other arrays.
    • 0