一、ini文件
语法：由节、键、值组成

节：section
参数：(键=值)
ini文件注释一分号（;）开头

二、QSettings

关于QSettings类请参阅
QT中对ini文件的操作使用到QSettings类

//函数
QSettings(ini路径文件名, QSettings::IniFormat); //构造函数
setIniCodec(QTextCodec::codecForName("utf-8"));//设置编码，utf-8格式
value(); //得到参数对应的文本
setValue(); //设置文本

beginGroup(section值); //开始一组section
endGroup(); //结束一组section

三、演示案例
下面演示一个Tab Widget控件对ini文件的读取与写入
//ini文件数据读取到Tab Widget控件中

QFileInfo iniFileInfo = QFileInfo(iniPathString); //iniPathString为ini文件的路径
if(iniFileInfo.exists()) //如果ini文件存在
{QSettings *config = new QSettings(iniPathString, QSettings::IniFormat);config->setIniCodec(QTextCodec::codecForName("utf-8"));//设置ini文件为utf-8格式for(int i = 0; i < 10; i++)//假设最大十个section{QString section = QString("teacher%1/").arg(i);//格式化if(config->value(section + "name").toString().isEmpty()){continue;//空数据不做处理}currentRow = i; //当前行数ui->tableWidget->insertRow(i);//插入新行itemName = config->value(section + "name").toString();currentColumn = 0;ui->tableWidget->setItem(currentRow, currentColumn, new QTableWidgetItem(itemName));//插入第0行第0列itemName = config->value(section + "course").toString();currentColumn = 1;ui->tableWidget->setItem(currentRow, currentColumn, new         QTableWidgetItem(itemName));//插入0行第1列itemName = config->value(section + "time").toString();currentColumn = 2;ui->tableWidget->setItem(currentRow, currentColumn, new QTableWidgetItem(itemName));//插入第0行第2列itemName = config->value(section + "read").toString();currentColumn = 3;ui->tableWidget->setItem(currentRow, currentColumn, new QTableWidgetItem(itemName));//插入第0行第3列}delete config;
}

//将Tab Widget控件中的数据写入ini文件中

if(iniFileInfo.exists())//如果ini文件存在
{QSettings *config = new QSettings(iniPathString, QSettings::IniFormat);config->setIniCodec(QTextCodec::codecForName("utf-8"));//告诉Qt ini文件为utf-8格式for(int i = 0; i < ui->tableWidget->rowCount(); i++){QString section = QString("teacher%1/").arg(i);config->beginGroup(section); //开始一组sectionconfig->setValue("name", ui->tableWidget->item(i, 0)->text());config->setValue("course", ui->tableWidget->item(i, 1)->text());config->setValue("time", ui->tableWidget->item(i, 2)->text());config->setValue("read", ui->tableWidget->item(i, 3)->text());config->endGroup();}delete config;
}