QT ini文件操作

先上ui图

widget.h

#ifndef WIDGET_H
#define WIDGET_H

#include 

QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE

class Widget : public QWidget
{
    Q_OBJECT

public:
    Widget(QWidget *parent = nullptr);
    ~Widget();

private slots:
    void on_pushButton_clicked();  //插入行

    void on_pushButton_2_clicked();   //删除行

    void on_pushButton_3_clicked();     //导入ini文件

    void on_pushButton_4_clicked();     //导出ini文件

private:
    Ui::Widget *ui;
};
#endif // WIDGET_H

widget.cpp

#include "widget.h"
#include "ui_widget.h"

#include 
#include 
#include 
#include 

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
}

Widget::~Widget()
{
    delete ui;
}


void Widget::on_pushButton_clicked()
{
    int currentRow = ui->tableWidget->currentRow();
    ui->tableWidget->insertRow(currentRow+1);
}

void Widget::on_pushButton_2_clicked()
{
    int row =ui->tableWidget->currentRow();
    ui->tableWidget->removeRow(row);
}

void Widget::on_pushButton_3_clicked()
{
    int currentRow;
       int currentCoumn;
       QString itemName;
       QString itemCourse;
       QString itemTime;
       QString itemRead;

       QSettings *config = new QSettings("I:/teacher.ini", QSettings::IniFormat);
       config->setIniCodec(QTextCodec::codecForName("utf-8"));

       //不知道文件里有多少个section 假设最多有20个section
       for(int i = 0; i < 20; i++)
       {
           QString section = QString("teacher%1/").arg(i);
           if(config->value(section + "name").toString().isEmpty())
           {
               //break; //可能有空值(有section 无value)
               continue;
           }

           ui->tableWidget->insertRow(i);

           currentRow = i;
           currentCoumn = 0;
           itemName = config->value(section + "name").toString();
           ui->tableWidget->setItem(currentRow, currentCoumn,
                                    new QTableWidgetItem(itemName));

            
           itemCourse = config->value(section + "course").toString(); //key 得到value
           currentCoumn = 1;
           ui->tableWidget->setItem(currentRow, currentCoumn,
                                    new QTableWidgetItem(itemCourse));

           itemTime = config->value(section + "time").toString(); //key 得到value
           currentCoumn = 2;
           ui->tableWidget->setItem(currentRow, currentCoumn,
                                    new QTableWidgetItem(itemTime));

           itemRead = config->value(section + "read").toString(); //key 得到value
           currentCoumn = 3;
           ui->tableWidget->setItem(currentRow, currentCoumn,
                                    new QTableWidgetItem(itemRead));
             qDebug()<<section;
       }
      ui->lineEdit->setText("导入成功");
       delete config;
}

void Widget::on_pushButton_4_clicked()
{
    QFileInfo iniFileInfo;
  //    iniFileInfo = QFileInfo("teacher.ini");

      QSettings *config = new QSettings("I:/qtproject/teacher.ini", QSettings::IniFormat);
      config->setIniCodec(QTextCodec::codecForName("utf-8"));


      for(int i = 0; i < ui->tableWidget->rowCount(); i++)
      {
          QString section = QString("teacher%1/").arg(i);
          config->beginGroup(section);
          config->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();
      }
      ui->lineEdit->setText("导出成功");
      delete config;
}