Cocos2d-x xml解析

標籤：

Cocos2d-x xml解析

Cocos2d-x 已經加入了tinyxml2用於xml的解析。3.0版本位於external/tinyxml2下。2.x版本位於cocos2dx/support/tinyxml2下。

tinyxml2 Github地址：https://github.com/leethomason/tinyxml2

協助文檔地址：http://grinninglizard.com/tinyxml2docs/index.html

產生xml文檔

1. 引入標頭檔

   #include "tinyxml2/tinyxml2.h"using namespace tinyxml2;

2. xml文檔產生

   void  HelloWorld::makeXML(const char *fileName){std::string filePath = FileUtils::getInstance()->getWritablePath() + fileName;XMLDocument *pDoc = new XMLDocument();//xml 聲明（參數可選）XMLDeclaration *pDel = pDoc->NewDeclaration("xml version=\"1.0\" encoding=\"UTF-8\"");pDoc->LinkEndChild(pDel);//添加plist節點XMLElement *plistElement = pDoc->NewElement("plist");plistElement->SetAttribute("version", "1.0");pDoc->LinkEndChild(plistElement);XMLComment *commentElement = pDoc->NewComment("this is xml comment");plistElement->LinkEndChild(commentElement);//添加dic節點XMLElement *dicElement = pDoc->NewElement("dic");plistElement->LinkEndChild(dicElement);//添加key節點XMLElement *keyElement = pDoc->NewElement("key");keyElement->LinkEndChild(pDoc->NewText("Text"));dicElement->LinkEndChild(keyElement);XMLElement *arrayElement = pDoc->NewElement("array");dicElement->LinkEndChild(arrayElement);for (int i = 0; i<3; i++) {    XMLElement *elm = pDoc->NewElement("name");    elm->LinkEndChild(pDoc->NewText("Cocos2d-x"));    arrayElement->LinkEndChild(elm);}pDoc->SaveFile(filePath.c_str());pDoc->Print();delete pDoc;}

3. 列印結果

   <?xml version="1.0" encoding="UTF-8"?><plist version="1.0"><!--this is xml comment--><dic>    <key>Text</key>    <array>        <name>Cocos2d-x</name>        <name>Cocos2d-x</name>        <name>Cocos2d-x</name>    </array></dic></plist>

上面代碼使用tinyxml簡單產生了一個xml文檔。

解析xml

下面我們就來解析上面建立的xml文檔

1. 引入標頭檔

   #include "tinyxml2/tinyxml2.h"using namespace tinyxml2;

2. xml解析

   void HelloWorld::parseXML(const char *fileName){std::string filePath = FileUtils::getInstance()->getWritablePath() + fileName;XMLDocument *pDoc = new XMLDocument();XMLError errorId = pDoc->LoadFile(filePath.c_str());if (errorId != 0) {    //xml格式錯誤    return;}XMLElement *rootEle = pDoc->RootElement();//擷取第一個節點屬性const XMLAttribute *attribute = rootEle->FirstAttribute();//列印節點屬性名稱和值log("attribute_name = %s,attribute_value = %s", attribute->Name(), attribute->Value());XMLElement *dicEle = rootEle->FirstChildElement("dic");XMLElement *keyEle = dicEle->FirstChildElement("key");if (keyEle) {    log("keyEle Text= %s", keyEle->GetText());}XMLElement *arrayEle = keyEle->NextSiblingElement();XMLElement *childEle = arrayEle->FirstChildElement();while ( childEle ) {    log("childEle Text= %s", childEle->GetText());    childEle = childEle->NextSiblingElement();}delete pDoc;}

   在節點解析過程中，注意對擷取到的節點進行判空處理。

3. 解析結果列印

   cocos2d: attribute_name = version,attribute_value = 1.0cocos2d: keyEle Text= Textcocos2d: childEle Text= Cocos2d-xcocos2d: childEle Text= Cocos2d-xcocos2d: childEle Text= Cocos2d-x

小結

上面的簡單樣本，示範了如何使用tinyxml進行xml文檔產生和解析。更多詳細的協助請參考 tinyxml協助文檔http://grinninglizard.com/tinyxml2docs/index.html

Cocos2d-x xml解析