利用QSettings設定配置檔案

#include <QSettings>

QSettings setting(QCoreApplication::applicationDirPath()+"/config.ini",QSettings::IniFormat);//判斷是否存在配置檔案，不存在則新建config.ini
    
    //判斷是否存在這樣的鍵值對HostName，Port，UserName，Password
    if(!setting.contains("HostName")||!setting.contains("Port")||!setting.contains
 
("UserName")||!setting.contains("Password"))
    {
        //不存在則建立初值，預設節General
        setting.setValue("HostName","127.0.0.1");
        setting.setValue("Port",3306);
        setting.setValue("UserName","root");
        setting.setValue("Password","123456");
    }
    
    QString HostName = setting.value
 
("HostName").toString();
    int Port = setting.value("Port").toInt();
    
    if(!setting.contains("com1/baud"))//com1為節，baud為鍵，520為值
        setting.setValue("com1/baud",520); //不存在則建立則賦初值
    qDebug()<<setting.value("com1/baud").toString();