Qt多线程笔记 （2）

需求：处理多个*.dat文件，为每一个*.dat开辟一个线程。
下面的代码是乞丐丁哥纯手工打造。再次强烈感谢天下热心人。

乞丐丁 的搞法是直接使用run（）来运行work thread
还有个技巧就是通过构造函数来传递参数，这些参数在thread类里面是全局变量。

#ifndef TOOLREPLACE_H#define TOOLREPLACE_H#include <QtWidgets>class CToolReplace : public QWidget{Q_OBJECTpublic:CToolReplace(QWidget *parent = 0);~CToolReplace();QStringList gasFileList;signals:void SigSendFileName(qint32, QString);private slots:void OpenFile();void SendFiles();void UpdateStatus(qint32 iRow, QString sStatus);private:void InitUI();private:QTableWidget *tbFile;QMenuBar *mbMain;QMenu *m_File;QAction *a_Open;QAction *a_Close;QMenu *m_Operate;QAction *a_Replace;QToolBar *tbMain;};#endif // TOOLREPLACE_H

#ifndef WORKTHREAD_H#define WORKTHREAD_H#include <QThread>class CWorkThread : public QThread{Q_OBJECTpublic:CWorkThread(qint32 iRow, QString sFileName, QObject *parent = 0);void run();signals:void SigStatus(qint32, QString);private:qint32 m_Row;QString m_FileName;};#endif // WORKTHREAD_H

#include "toolreplace.h"#include "workthread.h"CToolReplace::CToolReplace(QWidget *parent): QWidget(parent){resize(710,500);InitUI();a_Replace->setEnabled(false);}CToolReplace::~CToolReplace(){}void CToolReplace::InitUI(){mbMain = new QMenuBar(this);m_File = mbMain->addMenu(tr("File"));a_Open = m_File->addAction(tr("Open File"));a_Open->setIcon(QIcon(":/CToolReplace/Open"));m_File->addSeparator();a_Close = m_File->addAction(tr("Close File"));a_Close->setIcon(QIcon(":/CToolReplace/Close"));m_Operate = mbMain->addMenu(tr("Operate"));a_Replace = m_Operate->addAction(tr("Replace"));a_Replace->setIcon(QIcon(":/CToolReplace/Replace"));tbMain = new QToolBar(this);tbMain->addAction(a_Open);tbMain->addSeparator();    tbMain->addAction(a_Replace);tbMain->addSeparator();    tbMain->addAction(a_Close);tbFile = new QTableWidget;tbFile->setColumnCount(2);tbFile->setHorizontalHeaderLabels(QStringList()<<tr("File Name")<<tr("Status"));tbFile->setColumnWidth(0,500);tbFile->setColumnWidth(1,200);QVBoxLayout *vl = new QVBoxLayout;vl->setContentsMargins(0,0,0,0);vl->setSpacing(0);vl->addWidget(mbMain);vl->addWidget(tbMain);vl->addWidget(tbFile);setLayout(vl);connect(a_Open, SIGNAL(triggered()), this, SLOT(OpenFile()));connect(a_Replace, SIGNAL(triggered()), this, SLOT(SendFiles()));connect(a_Close, SIGNAL(triggered()), this, SLOT(close()));}void CToolReplace::OpenFile(){a_Replace->setEnabled(false);while(tbFile->rowCount() != 0){tbFile->removeRow(tbFile->rowCount());}    gasFileList = QFileDialog::getOpenFileNames(this,tr("Select Files"),"D:/","Dat(*.dat)");if(!gasFileList.isEmpty()){a_Replace->setEnabled(true);}for(qint32 i = 0; i < gasFileList.count(); i++){tbFile->insertRow(i);tbFile->setItem(i,0,new QTableWidgetItem(gasFileList.at(i)));tbFile->setItem(i,1,new QTableWidgetItem(tr("Wait")));}}void CToolReplace::SendFiles(){for(qint32 i = 0; i < gasFileList.count(); i++){CWorkThread *myThread = new CWorkThread(i, gasFileList.at(i));connect(myThread, SIGNAL(SigStatus(qint32, QString)), this, SLOT(UpdateStatus(qint32, QString)));connect(myThread, SIGNAL(finished()), myThread, SLOT(deleteLater()));myThread->start();}}void CToolReplace::UpdateStatus(qint32 iRow, QString sStatus){tbFile->setItem(iRow, 1, new QTableWidgetItem(sStatus));}

#include "workthread.h"#include <QStringList>#include <QFile>#include <QTextStream>#include <QDebug>CWorkThread::CWorkThread(qint32 iRow, QString sFileName, QObject *parent): QThread(parent){m_Row = iRow;m_FileName = sFileName;}void CWorkThread::run(){QStringList asAllRow;    asAllRow.clear();QFile m_File(m_FileName);    if(!m_File.open(QIODevice::ReadOnly | QIODevice::Text)){emit SigStatus(m_Row, QString(tr("Cannot open file for read: %1").arg(m_File.errorString())));return;}emit SigStatus(m_Row, tr("1, Reading file~~~~~"));QTextStream m_TextStream(&m_File);m_TextStream.setCodec("UTF-8");    while(!m_TextStream.atEnd()){asAllRow.append(m_TextStream.readLine());}    m_File.close();    qDebug()<<"str count:"<<asAllRow.count();    if (asAllRow.size() < 2)    {        qDebug()<<"Less than 2 row!";        return;    }    emit SigStatus(m_Row, tr(("2, Replacing file~~~")));    asAllRow.replace(1, asAllRow.at(2));    QFile m_FileWrite(m_FileName);    if(!m_FileWrite.open(QIODevice::WriteOnly | QIODevice::Text))    {        emit SigStatus(m_Row, QString(tr("Cannot open file for read: %1").arg(m_FileWrite.errorString())));        return;    }emit SigStatus(m_Row, tr("3, Writing file~~~~~"));    QTextStream m_TextStreamOut(&m_FileWrite);    m_TextStreamOut.setCodec("UTF-8");for(qint32 iOut = 0; iOut < asAllRow.count(); iOut++){        m_TextStreamOut<<asAllRow.at(iOut)<<"\n";}m_TextStream.flush();    m_FileWrite.close();emit SigStatus(m_Row, tr("4, Finished!~~~~~~~~"));}