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>