QT 笔记保存，位置跟随，代码实现方式

#include "mainwindow.h"

#include "ui_mainwindow.h"

#include <QTextCodec>

#include <qdebug.h>

#include <qtextcodec.h>

#include <qsettings.h>

#include <QMessageBox>

MainWindow::MainWindow(QWidget *parent)

    : QMainWindow(parent)

    , ui(new Ui::MainWindow)

{

    ui->setupUi(this);

    //透明设置

    setWindowOpacity(0.6);

//读取坐标值

int X,Y;

QString stringX;

  QString stringY;

QTextCodec *codec = QTextCodec::codecForName("utf-8");

QFile file1("坐标.txt");

if(!file1.open(QIODevice::ReadOnly|QIODevice::Text))

       return;

while(!file1.atEnd())

 {

      //读取一行文本数据

      QByteArray line = file1.readAll();

      //将读取到的行数据转换为Unicode

      QString str =codec->toUnicode(line);

      //将得到的字符设置到编辑框中显示

      char* ptr;

       QByteArray ba;

    ba=str.toLatin1();

    ptr=ba.data();

    QString value="";

    bool bol=true;

    for (int i = 1; i < strlen(ptr); i++) {

        value=ptr[i];

        if(value=="Y"){

        bol=false;

        }

        else{

            if(bol)

            {

                stringX+=value;

            }

            else{

               stringY+=ptr[i];

            }

        }

    }

    qDebug()<<stringX;

    qDebug()<<stringY;

//转换并输出成int值

     X=stringX.toInt();

     Y=stringY.toInt();

    // qDebug()<<str;

     qDebug()<<X;

     qDebug()<<Y;

  }

//添加窗口值

window()->move(X,Y);//窗口位置

    //读取笔记内容并显示

    QFile file("翻译笔记.txt");

    if(!file.open(QIODevice::ReadOnly|QIODevice::Text))

           return;

    while(!file.atEnd())

     {

          //读取一行文本数据

          QByteArray line = file.readAll();

          //将读取到的行数据转换为Unicode

          QString str =codec->toUnicode(line);

          //将得到的字符设置到编辑框中显示

          ui->plainTextEdit->setPlainText(str);

      }

}

MainWindow::~MainWindow()

{

    delete ui;

}

void MainWindow::on_actionOK_triggered()

{

   //保存笔记

    QFile file("翻译笔记.txt");

         if(!file.open(QIODevice::WriteOnly|QIODevice::Text)){

             QMessageBox::warning(this,QStringLiteral("警告"), file.errorString());

             return;

         }

         QTextStream out(&file);

          out.setCodec("utf-8");

         QString str=ui->plainTextEdit->toPlainText();

         out<<str;

         file.close();

}

void MainWindow::closeEvent( QCloseEvent * event )

{

    //获取本项目坐标并存储到文件夹中

    QPoint pos = QCursor::pos();

    QFile file("坐标.txt");

     if(!file.open(QIODevice::WriteOnly|QIODevice::Text)){

         QMessageBox::warning(this,QStringLiteral("警告"), file.errorString());

         return;

     }

    QTextStream out(&file);

    out.setCodec("utf-8");

    int x=window()->pos().x();

    int y=window()->pos().y();

    QString ab="X";

    ab+= QString::number(x);

    ab+="Y";

    ab+=QString::number(y);

    qDebug()<<ab;

    out<<ab;

    file.close();

//关闭窗口时 再次确定是否关闭

switch( QMessageBox::information( this, tr("exit tip"), tr("Do you really want exit?"), tr("Yes"), tr("No"), 0, 1 ) )

   {

     case 0:

          event->accept();

          break;

     case 1:

     default:

         event->ignore();

         break;

   }

}