【cocos2d-x】無限重複動作-新手引導箭頭上下移動

讓箭頭上下無限重複移動的方法：

CCSprite *arrow = CCSprite::createWithSpriteFrameName("ug_arrow");if (arrow){    arrow->setAnchorPoint(info.arPoint);    arrow->setPosition(ccp(info.centerPos.x, info.centerPos.y+80));    this->addChild(arrow, 10);    // TODO：讓箭頭重複上下移動    CCMoveBy *move = CCMoveBy::create(0.3f, ccp(0, 10));    arrow->runAction(CCRepeatForever::create(static_cast<CCSequence *>(CCSequence::create(move, move->reverse(), NULL))));}