跨平台解析xml的方法(tinyXML)

 在开发cocos2dx跨平台网络游戏的时候，数据基本都会处理成xml格式。

cocos2dx封装了libxml，处理xml可以使用封装好的类CCSAXParser,  

采用key - value ，key- value方式编辑的xml可以采用CCSAXParser。

我们编辑的xml大量使用到了key-value -Attribute ，就是数据基本都写在了属性里面，所以我采用了第三方库tinyxml

下面是代码实现：

void HXmlParse::Read_questxml(const char * docname ,  char* buf_ ,GameBoard * gameBoardinstance){

    TiXmlDocument doc(docname);
    //bool loadOkay = doc.LoadFile();
        if( strcmp( docname,"")!=0){
//这个是从网络下载的文件，缓存到本地，所以有判断
    char* pBytes = GOEUtilies::getFileDataFromWriteablePath(docname);
//  CCLog("getFileData:%s |pBytes:%d",docname,size);
    doc.Parse((const char *)pBytes,0,TIXML_ENCODING_UTF8);
        }else
        {
            doc.Parse((const char*)buf_,0,TIXML_ENCODING_UTF8);
        }


//  if ( !loadOkay )
//  {
//      CCLOG( "Could not load test file '%s'. Error='%s'. Exiting.\n", docname,doc.ErrorDesc() );
//      return;
//  }

    TiXmlNode* noderoot = 0;           //the root node
    //TiXmlNode* nodearray = 0;
    TiXmlElement* todoElement = 0;   // the first node , like Accout,Crop ...
    TiXmlElement* itemElement = 0;   //  the Accout,Crop 's element list

    noderoot = doc.RootElement()->FirstChild();

    gameBoardinstance->_goeStaticData->quests_ = new CCDictionary();

    for( todoElement = noderoot->FirstChildElement();
        todoElement;
        todoElement = todoElement->NextSiblingElement())
    {
        GOEStaticQuest * quest = new GOEStaticQuest();
        quest->questId_ = atoi(todoElement->Attribute("id"));
        gameBoardinstance->_goeStaticData->questId_ = quest->questId_;
        quest->needIds_ = *(CCString::create(todoElement->Attribute("needid")));
        quest->nextIds_ = *(CCString::create(todoElement->Attribute("nextid")));
        quest->newId_ = atoi(todoElement->Attribute("newid"));
        quest->exp_ = atoi(todoElement->Attribute("exp"));
        quest->resource_ = atoi(todoElement->Attribute("recource"));
        quest->coin_ = atoi(todoElement->Attribute("coin"));

        quest->card_ = *(CCString::create(todoElement->Attribute("card")));
        quest->icon_ = *(CCString::create(todoElement->Attribute("icon")));
        quest->power_ = atoi(todoElement->Attribute("power"));

        gameBoardinstance->_goeStaticData->quests_->setObject((CCObject*)quest, quest->questId_);

        for( itemElement = todoElement->FirstChildElement();
            itemElement;
            itemElement = itemElement->NextSiblingElement() )
        {
            GOEStaticTask * task = new GOEStaticTask();
            task->taskId_ = atoi(itemElement->Attribute("id"));
            task->action_ = *(CCString::create(itemElement->Attribute("action")));
            task->type_ = *(CCString::create(itemElement->Attribute("type")));
            task->value_ = *(CCString::create(itemElement->Attribute("value")));
            task->params_ = *(CCString::create(itemElement->Attribute("params")));

            GOEStaticQuest * q = (GOEStaticQuest*)gameBoardinstance->_goeStaticData->quests_->objectForKey(gameBoardinstance->_goeStaticData->questId_);
            q->tasks_.addObject((CCObject*)task);
        }

    }
}

 

可以对比xml，很容易理解代码，主要就是节点，然后遍历

<?xml version='1.0' encoding='UTF-8' standalone='no'?>
<goe:database xmlns:goe='http://www.elex-tech.com/sns/platform/' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'>
<quests>
<quest id="301" icon="quest2" newid="0" needid="202" nextid="401" exp="0" recource="0" coin="0" card="0" power="0">
<task id="0" action="buildingHarvest" type="301" value="0" params="0"/>
</quest>
<quest id="302" icon="quest2" newid="0" needid="204" nextid="402" exp="0" recource="0" coin="0" card="0" power="0">
<task id="0" action="buildingHarvest" type="401" value="0" params="0"/>
</quest>
</quests>
</goe:database>