QT中QtConcurrent创建并行线程的方法

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头文件中：

#include <QtConcurrentRun>

#include <QProcess>

#include <QFuture>

protected:

    bool event(QEvent *event);

/*

 自定义的ProgressEvent结构体

 */

struct ProgressEvent : public QEvent

{

    enum {EventId = QEvent::User};

    explicit ProgressEvent(bool saved_, const DWORD &message_)

        : QEvent(static_cast<QEvent::Type>(EventId)),

          saved(saved_), message(message_) {}

    const bool saved;

    const DWORD message;

};

在类的成员函数中写：

QFuture<void> future = QtConcurrent::run(runVipNet,this,path);

//阻塞主线程直到计算完成

future.waitForFinished();

runVipNet是类外函数：

//

void runVipNet(QMainWindow *receiver,QString _path)

{

    QApplication::postEvent(receiver,new ProgressEvent(true, (DWORD)QThread::currentThreadId()));

    MainWindow* s = (MainWindow*) receiver;

    //获取线程ID

    s->addThreadID((DWORD)QThread::currentThreadId());

    //运行外部exe

    QProcess::startDetached(_path,QStringList());

}

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//

bool MainWindow::event(QEvent *event)

{

    if (event->type() == static_cast<QEvent::Type>(ProgressEvent::EventId))

    {

         ProgressEvent *progressEvent = static_cast<ProgressEvent*>(event);

         Q_ASSERT(progressEvent);

         ui->textBrowser->append(QString::number(progressEvent->message));

         return true;

    }

    return QMainWindow::event(event);

}

/*

 自定义的ProgressEvent结构体

 */

struct ProgressEvent : public QEvent

{

    enum {EventId = QEvent::User};

    explicit ProgressEvent(bool saved_, const DWORD &message_)

        : QEvent(static_cast<QEvent::Type>(EventId)),

          saved(saved_), message(message_) {}

    const bool saved;

    const DWORD message;

};