cocos2d iphone - EXC_BAD_ACCESS issue with contact listener -

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i getting exc_bad_access error in contact listener code. below code:

main object class (gameobjects) through objects subclassed:

gameobjects.h:

#import "cocos2d.h" #import "ccnode.h" #import "ccphysicssprite.h" #import "box2d.h" #include <math.h>  @interface gameobjects : ccnode {     //b2body* objectbody_; }  -(b2body*)getobjectbody; -(void)objectstouched:(gameobjects*)otherobject; @end

gameobjects.mm (for want cclog tell if it's working):

#import "gameobjects.h"  @implementation gameobjects  -(b2body*)getobjectbody    { }  -(void)objectstouched:(gameobjects*)otherobject   {    cclog(@"it's working"); }  @end

contactlistenertest.h:

#import <foundation/foundation.h> #import "cocos2d.h" #import "box2d.h" #import "enemy.h" #import "sprite.h" #import "gameobjects.h"    class contactlistenertest : public b2contactlistener    { public:     b2world* world;    void begincontact(b2contact* contact); };

contactlistenertest.mm:

#import "contactlistenertest.h"  void contactlistenertest:: begincontact(b2contact *contact) {      b2fixture       *fixturea = contact->getfixturea();     b2fixture       *fixtureb = contact->getfixtureb();     b2body          *fixtureabody = fixturea->getbody();     b2body          *fixturebbody = fixtureb->getbody();      gameobjects* spriteobject = (gameobjects*)fixtureabody->getuserdata();     gameobjects* spriteobject2 = (gameobjects*)fixturebbody->getuserdata();      [spriteobject objectstouched:spriteobject2];     [spriteobject2 objectstouched:spriteobject];  }

when exc_bad_access error following printed in console:

-[enemy objectstouched:]: unrecognized selector sent instance 0x8558840

enemy 1 of subclasses of gameobjects.

verify userdata object of gameobjects class:

nsassert1([spriteobject iskindofclass:[gameobjects class]],            @"userdata %@ not game object", spriteobject); nsassert1([spriteobject2 iskindofclass:[gameobjects class]],            @"userdata 2 %@ not game object", spriteobject2);

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