Sprite *land = Sprite::createWithSpriteFrame(pngName);        PhysicsBody *Landbody = PhysicsBody::create();        Landbody->addShape(PhysicsShapeBox::create(            Size(land->getContentSize().width,land->getContentSize().height)            ,PhysicsMaterial(1,0,1)));        Landbody->setDynamic(false);//我测试的效果是 是否动态（即给他速度或力，他并不会动）        Landbody->setLinearDamping(0.0f);//阻力        Landbody->setGravityEnable(false);//是否受重力        Landbody->setContactTestBitmask(1);//只要物体的这个至进行与操作后不为零则触发碰撞        // add the sprite as a child to this layer        land->setPhysicsBody(Landbody);

        auto contactListener = EventListenerPhysicsContact::create();        contactListener->onContactBegin = CC_CALLBACK_1(GameLayer::onContactBegin, this);        this->getEventDispatcher()->addEventListenerWithSceneGraphPriority(contactListener, this);bool GameLayer::onContactBegin(const PhysicsContact& contact){    return true;//true触发碰撞，false穿过，将碰撞事件传递给下一个检测回调函数   }