CC_CALLBACK_functions.cpp

bool HelloWorld::init()
{
  /*has some code*/


  //CC_CALLBACK_0 function
  auto sprite1 = Sprite::create("CloseNormal.png");
  auto callback = CCCallFunc::create(CC_CALLBACK_0(HelloWorld::myFunction1, this));
  sprite1->runAction(callback);
  this->addChild(sprite1);

  auto sprite2 = Sprite::create("CloseNormal.png");
  auto callback = CCCallFunc::create(CC_CALLBACK_1(HelloWorld::myFunction2, this));
  sprite2->runAction(callback);
  this->addChild(sprite2);

  auto btn = Button::create("CloseNormal.png","CloseNormal.png");
  btn->addTouchEventListener(CC_CALLBACK_2(HelloWorld::myFunction3, this));
  this->addChild(btn);
  
}
void HelloWorld::myFunction1()
{// no passed param
  CCLOG("myFunction1");
}
void HelloWorld::myFunction2(Ref* pSender)
{//one passed param
  CCLOG("myFunction2");
}
void HelloWorld::myFunction3(Ref* pSender, Widget::TouchEvent e)
{//two passed param
  //Button event listener
  CCLOG("myFunction3");
}