Cocos2d-x xml解析
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
- 引入头文件
#include "tinyxml2/tinyxml2.h" using namespace tinyxml2;
- 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; }
- 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
- 引入头文件
#include "tinyxml2/tinyxml2.h" using namespace tinyxml2;
- 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。
- 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
时间: 2024-10-14 14:16:27