title: Action on press CCMenuItem. not on unpress
body: <p>I'm developing an app on cocos2d. I heard it is recommend to make my controls using CCMenu class. So, I made a button, set target and selector. But selector colled only when I unpress my button. how can I make it be called at rhe moment I pressed the button?</p>
  
  <pre><code>#import "Button.h"
  
  @implementation Button
  
  + (id)buttonWithImage:(NSString*)file atPosition:(CGPoint)position target:(id)target selector:(SEL)selector {
      CCMenu *menu = [CCMenu menuWithItems:[ButtonItem buttonWithImage:file target:target selector:selector], nil];
      menu.position = position;
      return menu;
  }
  @end
  
  @implementation ButtonItem
  
  + (id)buttonWithImage:(NSString*)file target:(id)target selector:(SEL)selector {
      return [[[self alloc] initWithImage:file target:target selector:selector] autorelease];
  }
  
  
  - (id)initWithImage:(NSString*)file target:(id)target selector:(SEL)selector {
      if(self = [super initWithTarget:target selector:selector]) {
  
          back = [[CCSprite spriteWithFile:@"DPad_BG.png"] retain];
          back.anchorPoint = ccp(0,0);
          backPressed = [[CCSprite spriteWithFile:@"DPad_BG.png"] retain];
          backPressed.anchorPoint = ccp(0,0);
          [self addChild:back];
  
          self.contentSize = back.contentSize;
  
          CCSprite* image = [CCSprite spriteWithFile:file];
          [self addChild:image z:1];
          image.position = ccp(self.contentSize.width / 2, self.contentSize.height / 2);
  
      }
      return self;
  }
  
  -(void) selected {
      [self removeChild:back cleanup:NO];
      [self addChild:backPressed];
      [super selected];
  }
  
  -(void) unselected {
      [self removeChild:backPressed cleanup:NO];
      [self addChild:back];
      [super unselected];
  }
  
  // this prevents double taps
  - (void)activate {
      [super activate];
      [self setIsEnabled:NO];
      [self schedule:@selector(resetButton:) interval:0.5];
  }
  
  - (void)resetButton:(ccTime)dt {
      [self unschedule:@selector(resetButton:)];
      [self setIsEnabled:YES];
  }
  
  - (void)dealloc {
      [back release];
      [backPressed release];
      [super dealloc];
  }
  
  @end
  </code></pre>