3.3的问题

Cocos2d-x
#1

auto contactListener = EventListenerPhysicsContact::create();
contactListener->onContactBegin = (CC_CALLBACK_2(GameLayer::onContactBegin, this)) ;
this->getEventDispatcher()->addEventListenerWithSceneGraphPriority(contactListener, this);

#2

第二行，报错，说赋值号没有重载，怎么回事

求大神指导小白

#3

检查 CC_CALLBACK_2