c++使用rapidxml读取cocos2dx的配置文件

来源：互联网发布：入门单反推荐2017知乎编辑：程序博客网时间：2024/04/27 02:56

个人见解我们进行cocos2dx开发时可以像进行Android开发的那样专门建立一些配置文件例如Android中value下的string,color,dimen等资源更好的利用mvc的设计模式，可以实现配置与程序相分离！建立的配置文件如下

<?xml version="1.0" encoding="UTF-8" ?><resources>    <!-- Default screen margins, per the Android Design guidelines. -->    <dimen name="activity_horizontal_margin">16dp</dimen>    <dimen name="activity_vertical_margin">16dp</dimen>    <!-- string -->    <string name="app_name">AndroidBitmap</string>    <string name="hello_world">Hello world!</string>    <string name="action_settings">Settings</string>    <!-- color -->    <color name="comm_head_back">#f7514b</color>    <color name="comm_title_text">#FFFFFF</color>    <color name="bottom_hong">#f85d58</color>    <color name="bottom_qian">#929292</color>    <color name="black">#000000</color>    <color name="comm_back_ground">#B2B2B2</color>    <color name="comm_back_shaixuan">#F4F4F4</color>    <color name="comm_line_color">#B2B2B2</color>    <color name="com_title_1">#b1b1b1</color>    <color name="com_title_2">#007aff</color>    <!-- position -->    <position name="position1">12,23</position>    <position name="position2">12,23</position>    <!-- colorint -->    <colorint name="ccc31">123,343,344</colorint>    <!-- colordouble -->    <colordouble name="ccc33">0.2,0.5,0.7</colordouble></resources>

创建读取配置文件的工具类，使用了rapidxml进行解析的
头文件

#ifndef _GLOBALPARAMETER_H_#define _GLOBALPARAMETER_H_#include "rapidxml.hpp"//#include "rapidxml_iterators.hpp"#include "rapidxml_print.hpp"#include "rapidxml_utils.hpp"#include <map>  using namespace std;using namespace rapidxml;template <typename T>class PointXML{public:    PointXML(){}    PointXML(const T x, const T y)    {        this->x = x;        this->y = y;    }    T x;    T y;};template <typename T>class PointColorXML{public:    PointColorXML(){}    PointColorXML(const T r, const T g, const T b)    {        this->r = r;        this->g = g;        this->b = b;    }    T r;    T g;    T b;};class GlobalParameter{private :    GlobalParameter();    static GlobalParameter* m_GlobalParameter;    //load    void load();    //color    map<string, string> m_mapColor;    //dimen    map<string, string> m_mapDimen;    //string    map<string, string> m_mapString;    //position    map<string, PointXML<double>> m_mapPosition;    //colorint    map<string, PointColorXML<int>> m_mapColorint;    //colordouble    map<string, PointColorXML<double>> m_mapColordouble;    //分割字符串    std::vector<std::string> split(std::string str, std::string pattern);public:    static GlobalParameter* getInstance();    //------    string getColor(string name);    string getDimen(string name);    string getString(string name);    PointXML<double> getPosition(string name);    PointColorXML<int> getColorint(string name);    PointColorXML<double> getColordouble(string name);};#endif

源文件

#include "GlobalParameter.h"#include <stdlib.h>GlobalParameter* GlobalParameter::m_GlobalParameter = NULL;GlobalParameter::GlobalParameter(){    //加载数据    load();}GlobalParameter* GlobalParameter::getInstance(){    if (m_GlobalParameter == NULL)  //判断是否第一次调用      {        m_GlobalParameter = new GlobalParameter();    }    return m_GlobalParameter;}string GlobalParameter::getColor(string name){    map<string, string >::iterator iteratorl= m_mapColor.find(name);    if (iteratorl == m_mapColor.end())        return "";    else        return m_mapColor.find(name)->second;}string GlobalParameter::getDimen(string name){    map<string, string >::iterator iteratorl = m_mapDimen.find(name);    if (iteratorl == m_mapDimen.end())        return "";    else        return m_mapDimen.find(name)->second;}string GlobalParameter::getString(string name){    map<string, string >::iterator iteratorl = m_mapString.find(name);    if (iteratorl == m_mapString.end())        return "";    else        return m_mapString.find(name)->second;}PointXML<double> GlobalParameter::getPosition(string name){    map<string, PointXML<double> >::iterator iteratorl = m_mapPosition.find(name);    if (iteratorl == m_mapPosition.end())        return PointXML<double>(0, 0);    else        return m_mapPosition.find(name)->second;}PointColorXML<int> GlobalParameter::getColorint(string name){    map<string, PointColorXML<int> >::iterator iteratorl = m_mapColorint.find(name);    if (iteratorl == m_mapColorint.end())        return PointColorXML<int>(0, 0,0);    else        return m_mapColorint.find(name)->second;}PointColorXML<double> GlobalParameter::getColordouble(string name){    map<string, PointColorXML<double> >::iterator iteratorl = m_mapColordouble.find(name);    if (iteratorl == m_mapColordouble.end())        return PointColorXML<double>(0, 0, 0);    else        return m_mapColordouble.find(name)->second;}void GlobalParameter::load(){    file<> fdoc("E://demo.xml");    xml_document<> doc;           // character type defaults to char    try {        doc.parse<0>(fdoc.data());  //会改变参数的内容,tmpbuf的生命周期必须到解析完      }    catch (rapidxml::parse_error &e) {        return;    }    xml_node<>* root = doc.first_node();    xml_node<>* message = root->first_node();    for (; message; message = message->next_sibling())    {        if (message->value_size() != NULL)        {            string s = message->name();            if ( s == "dimen")            {                xml_attribute<>* att = message->first_attribute("name");                m_mapDimen.insert(pair<string, string>(att->value(), message->value()));            }            else if (s == "string")            {                xml_attribute<>* att = message->first_attribute("name");                m_mapString.insert(pair<string, string>(att->value(), message->value()));            }            else if (s == "color")            {                xml_attribute<>* att = message->first_attribute("name");                m_mapColor.insert(pair<string, string>(att->value(), message->value()));            }            else if (s == "position")            {                xml_attribute<>* att = message->first_attribute("name");                string value = message->value();                std::vector<std::string> ve = split(value, ",");                PointXML<double> p;                if (ve.size() < 2)                {                    if (ve.size() == 1)                    {                        p.x = atof(ve[0].data());                        p.y = 0;                    }                    else                    {                        p.x = 0;                        p.y = 0;                    }                }                else                {                    p.x = atof(ve[0].data());                    p.y = atof(ve[1].data());                }                m_mapPosition.insert(pair<string, PointXML<double>>(att->value(), p));            }            else if (s == "colorint")            {                xml_attribute<>* att = message->first_attribute("name");                string value = message->value();                std::vector<std::string> ve = split(value, ",");                PointColorXML<int> p;                if (ve.size() < 3)                {                    p.r = 0;                    p.g = 0;                    p.b = 0;                }                else                {                    p.r = atoi(ve[0].data());                    p.g = atoi(ve[1].data());                    p.b = atoi(ve[2].data());                }                m_mapColorint.insert(pair<string, PointColorXML<int>>(att->value(), p));            }            else if (s == "colordouble")            {                xml_attribute<>* att = message->first_attribute("name");                string value = message->value();                std::vector<std::string> ve = split(value, ",");                PointColorXML<double> p;                if (ve.size() < 3)                {                    p.r = 0;                    p.g = 0;                    p.b = 0;                }                else                {                    p.r = atof(ve[0].data());                    p.g = atof(ve[1].data());                    p.b = atof(ve[2].data());                }                m_mapColordouble.insert(pair<string, PointColorXML<double>>(att->value(), p));            }        }    }} //字符串分割函数std::vector<std::string> GlobalParameter::split(std::string str, std::string pattern){    std::string::size_type pos;    std::vector<std::string> result;    str += pattern;//扩展字符串以方便操作    int size=str.size();    for(int i=0; i<size; i++)    {        pos = str.find(pattern, i);        if(pos<size)        {            std::string s = str.substr(i, pos - i);            result.push_back(s);            i = pos + pattern.size() - 1;        }    }    return result;}

测试案例

GlobalParameter* m_Globalparameter = GlobalParameter::getInstance();    cout << m_Globalparameter->getColor("comm_head_back") << endl;    cout << m_Globalparameter->getString("app_name") << endl;    cout << m_Globalparameter->getDimen("activity_horizontal_margin") << endl;    PointXML<double> p = m_Globalparameter->getPosition("position1");    cout << p.x << "----" << p.y << endl;    PointColorXML<int> pi = m_Globalparameter->getColorint("ccc31");    cout << pi.r << "----" << pi.g << "---------" << pi.b << endl;    PointColorXML<double> pd = m_Globalparameter->getColordouble("ccc33");    cout << pd.r << "----" << pd.g << "---------" << pd.b << endl;

OK!这样修改配置信息时就不用再去修改程序了！

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