修改注册表QSettings

QSettings可以修改注册表中的信息

下面是自己做的修改IE代理的例子：

setHttpProxy.h

#ifndef SETHTTPPROXY_H
#define SETHTTPPROXY_H

#include 
#include 

class setHttpProxy : public QObject
{
    Q_OBJECT
public:
    explicit setHttpProxy(QObject *parent = 0);
    // 检查是否已设置代理
    bool checkHttpProxy();
    // 退出代理设置
    void close();
    // 设置代理
    void setIEValue();

signals:

public slots:

public:
    bool m_proxyEnable;
    // 代理服务器设置，IP:PORT
    QString m_proxyServer;
    QSettings *reg;

};

#endif // SETHTTPPROXY_H

setHttpProxy.cpp

#include "sethttpproxy.h"

setHttpProxy::setHttpProxy(QObject *parent)
    : QObject(parent)
{
    QString temp = "HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings";
    reg = new QSettings(temp, QSettings::NativeFormat);
}

void setHttpProxy::setIEValue()
{
    if( m_proxyEnable )
    {
        reg->setValue("ProxyEnable", 1);
        reg->setValue("ProxyServer", m_proxyServer);
    }
    else
        reg->setValue("ProxyEnable", 0);
}

bool setHttpProxy::checkHttpProxy()
{
    if( m_proxyEnable )
    {
        if( 1 == reg->value("ProxyEnable").toInt() &&
                m_proxyServer == reg->value("ProxyServer").toString() )
            return true;
        else
            return false;
    }
    else
    {
        if( 0 == reg->value("ProxyEnable").toInt() )
            return true;
        else
            return false;
    }
}

void setHttpProxy::close()
{
    delete reg;
}