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【官方文档】Cocos2d-x xml解析

发布时间:2020-12-14 19:59:03 所属栏目:百科 来源:网络整理
导读:转载自 zeroyang 2014-07-31 CCLOG ( "%s" ,filePath. c_str ()); // /Users/niezhao/Library/Developer/CoreSimulator/Devices/DD86FD72-6CE2-4459-8A4D-70D7C027F10D/data/Containers/Data/Application/8EC0197B-2A8B-407A-9D97-8ABC662A29B0/Documents/2b


转载自 zeroyang2014-07-31

CCLOG("%s",filePath.c_str());

// /Users/niezhao/Library/Developer/CoreSimulator/Devices/DD86FD72-6CE2-4459-8A4D-70D7C027F10D/data/Containers/Data/Application/8EC0197B-2A8B-407A-9D97-8ABC662A29B0/Documents/2bbb.xml




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

  1. 引入头文件

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    #include "tinyxml2/tinyxml2.h"
    using namespace tinyxml2;
  2. xml文档生成

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    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;
    }








  3. 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

  1. 引入头文件

    namespacetinyxml2;
  2. xml解析

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    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。

  3. 解析结果打印

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    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

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