How to send Method's name for elements

I'm making method to make button easily. but I don't know how to send method's name.. which is a button have to be called when user press this button. Is there any way to send this name?

I want to k开发者_如何学Pythonnow "???????????????????"part on my source below..

this source is part of "Support.m" which I'm making. Thanks..

+ (id)CreateButton:(id)layer (NSString*)filename secondfilename:(NSString*)filename2 sameimage:(BOOL)sameimage position:(CGPoint)position
{  
    CCSprite *sprite1 = [CCSprite spriteWithSpriteFrame:[[CCSpriteFrameCache sharedSpriteFrameCache] spriteFrameByName:filename]];
    CCSprite *sprite2 = [CCSprite spriteWithSpriteFrame:[[CCSpriteFrameCache sharedSpriteFrameCache] spriteFrameByName:filename2]];

    CCSprite *sprite1 = [CCSprite spriteWith
    CCMenuItem *MenuItem = [CCMenuItemImage itemFromNormalSprite:sprite1 selectedSprite:sprite2 target:layer selector:@selector(???????????????????????????????)];
    MenuItem.position = position;
    CCMenu *Menu = [CCMenu menuWithItems:MenuItem, nil];
    Menu.position = CGPointZero;
    return Menu;
}

Just put the name of the method which you want to be called when that menu item is selected:

 CCMenuItem *MenuItem = [CCMenuItemImage itemFromNormalSprite:sprite1 
                                               selectedSprite:sprite2 
                                                       target:layer 
                                                     selector:@selector(methodToRunWhenMenuItemIsSelected:)];

Whatever object the target is, in this case layer then needs to have a method of that name implemented:

 - (void) methodToRunWhenMenuItemIsSelected: (CCMenuItem *)item {
     // Do something interesting
 }