getAnchorPoint cocos2d-x 中关于描点的

CCSprite *pdatefram = CCSprite::createWithSpriteFrameName("trainselectframe.png");
CCPoint p = pdatefram->getAnchorPoint();
默认描点为（0.5，0.5）；
CCNode *nnode = CCNode::create();
p = nnode->getAnchorPoint();
默认描点为（0，0）；

CCLayer *player = CCLayer::create();
p = player->getAnchorPoint();
默认描点为（0.5，0.5）；

CCMenu *pmenu = CCMenu::create();

p = pmenu->getAnchorPoint();

默认描点为（0.5，0.5）；