Cocos2d-x 已经加入了tinyxml2 用于xml的解析。3.0版本位于external/tinyxml2 下。2.x版本位于cocos2dx/support/tinyxml2 下。
tinyxml2 Github地址:https://github.com/leethomason/tinyxml2
帮助文档地址:http://grinninglizard.com/tinyxml2docs/index.html
生成xml文档
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引入头文件 #include "tinyxml2/tinyxml2.h"
using namespace tinyxml2;
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xml文档生成 void HelloWorld::makeXML(const char *fileName)
{
std::string filePath = FileUtils::getInstance()->getWritablePath() + fileName;
XMLDocument *pDoc = new XMLDocument();
//xml 声明(参数可选)
XMLDeclaration *pDel = pDoc->NewDeclaration("xml version="1.0" encoding="UTF-8"");
pDoc->LinkEndChild(pDel);
//添加plist节点
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节点
XMLElement *dicElement = pDoc->NewElement("dic");
plistElement->LinkEndChild(dicElement);
//添加key节点
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;
}
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打印结果 <?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>
上面代码使用tinyxml简单生成了一个xml文档。
解析xml
下面我们就来解析上面创建的xml文档
#include "tinyxml2/tinyxml2.h"
using namespace tinyxml2;
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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格式错误
return;
}
XMLElement *rootEle = pDoc->RootElement();
//获取第一个节点属性
const XMLAttribute *attribute = rootEle->FirstAttribute();
//打印节点属性名和值
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;
} 在节点解析过程中,注意对获取到的节点进行判空处理。
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解析结果打印 cocos2d: attribute_name = version,attribute_value = 1.0
cocos2d: keyEle Text= Text
cocos2d: childEle Text= Cocos2d-x
cocos2d: childEle Text= Cocos2d-x
cocos2d: childEle Text= Cocos2d-x
小结
上面的简单示例,演示了如何使用tinyxml进行xml文档生成和解析。更多详细的帮助请参考 tinyxml帮助文档http://grinninglizard.com/tinyxml2docs/index.html
声明:本文是对http://www.cocos.com/帮助文档的阅读笔记。 (编辑:李大同)
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