Multi tryck på skärmen.

• I .h filen:
  void onTouchesBegan(const std::vector<cocos2d::Touch *> &touches,cocos2d::Event * event);
  void onTouchesMoved(const std::vector<cocos2d::Touch *> &touches,cocos2d::Event * event);
  void onTouchesEnded(const std::vector<cocos2d::Touch *> &touches,cocos2d::Event * event);
  
  
• I cpp filen:
  auto listener = EventListenerTouchAllAtOnce::create();
  listener->onTouchesBegan=CC_CALLBACK_2(HelloWorld::onTouchesBegan,this);
  listener->onTouchesMoved=CC_CALLBACK_2(HelloWorld::onTouchesMoved,this);
  listener->onTouchesEnded=CC_CALLBACK_2(HelloWorld::onTouchesEnded,this);
  _eventDispatcher->addEventListenerWithSceneGraphPriority(listener,this);
  
  void HelloWorld::onTouchesBegan(const std::vector<cocos2d::Touch *> &touches,cocos2d::Event * event)
  {
  CCLOG("MultiTouchesBegan x = %f, y = %f",touch->getLocation().x,touch->getLocation().y);
  }
  
  void HelloWorld::onTouchesMoved(const std::vector<cocos2d::Touch *> &touches,cocos2d::Event * event)
  {
  CCLOG("MultiTouchesMoved");
  }
  
  void HelloWorld::onTouchesEnded(const std::vector<cocos2d::Touch *> &touches,cocos2d::Event * event)
  {
  CCLOG("MultiTouchesEnded");
  }