不设置前可以在屏幕显示，设置后就消失了。
starSprite.push_back(Sprite::createWithTexture(Director::getInstance()->getTextureCache()->getTextureForKey(".//GamingScene//1_0//aroundStar.png")));
starSprite.back()->setContentSize(Size(10, 10));
starSprite.back()->setAnchorPoint( rootnode->getChildByTag(1)->getPosition() );
starSprite.back()->setVisible(true);
starSprite.back()->setPosition(300,300 );
//starSprite.back()->runAction(RepeatForever::create(RotateBy::create(2, 360)));
auto x = starSprite.back()->getAnchorPoint().x;
auto y = starSprite.back()->getAnchorPoint().y;
auto xx = rootnode->getChildByTag(1)->getPosition().x;
auto yy = rootnode->getChildByTag(1)->getPosition().y;
auto xxx = starSprite.back()->getPosition().x;
auto yyy = starSprite.back()->getPosition().y;
addChild(starSprite.back());
