QProcess的问题 [复制链接]

我的程序
void sysmoniDialog::readFromStdout()
{
    // Read and process the data.
    // Bear in mind that the data might be output in chunks.
/*
    QFile file("dir.txt");
    if(!file.open(IO_WriteOnly))
    {
        //ioError(in,tr("cannot open file dir.txt for reading));
        QMessageBox *box = new QMessageBox("Dir Results","cannot open file dir.txt for writing.",QMessageBox::Information,QMessageBox::Ok,0,0);
        box->show();
        exit(0);
    }

    QStringList lines;
    lines.append(process->readStdout());
   
    QTextStream stream( &file );
    for ( QStringList::Iterator it = lines.begin(); it != lines.end(); ++it )
        stream << *it << "\n";
    file.close();
*/
    textEdit1->append(p->readStdout());
}


void sysmoniDialog::GetProState()
{
   
    p = new QProcess(this);

    p->addArgument("more");
    p->addArgument("pro.txt");
    p->start();
    connect( p, SIGNAL(readyReadStdout()),this, SLOT(readFromStdout()) );
    /*
    QStringList command;
    command.append(tr("more"));
    command += " pro.txt";
    process->start(&command);
*/


    if (p->normalExit())
    {
        QMessageBox *box = new QMessageBox("Dir Results","If you see this message,the process dir is suceed.",QMessageBox::Information,QMessageBox::Ok,0,0);
        box->show();
    }
    else
    {
        QMessageBox *box = new QMessageBox("Dir Results","If you see this message,the process dir is failed.",QMessageBox::Information,QMessageBox::Ok,0,0);
        box->show();
    }
    delete p;
    p = 0;
}

执行时，QProcess p执行时，是抱错的！
各位请指点一下！

或许是进程还未执行完毕就读了 normalExit() 。

在  if (p->normalExit())
前面插入以下代码试一下

    if(!p->waitForStarted())
        qDebug() << "failed to start the program ";
    if(!p->waitForFinished())
    {
        qDebug() << "timeout!";
        p->kill();
    }

    p = new QProcess(this);
    connect( p, SIGNAL(readyReadStdout()),this, SLOT(readFromStdout()) );
    QStringList command;
    command << "more" << "pro.txt";
    process->start(command);  //这是引用传递参数
    p->start();

谢谢了,各位!