请教一个问题- Community - Deepin Technology

请教一个问题

Experiences and Insight 1300 views · 2 replies ·

FEI17

deepin

2012-11-28 20:56

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我之前用expect和spawn做了一个myxrgsu的认证脚本
但是现在我想用qt做一个他的图形前端遇到了一些问题

我的代码是这样写的

先用
QProcess *cmd=new QProcess;
cmd->start("myxrgsu")
来启动myxrgsu

接着用 cmd->readall()来读取输出
然后connect()一下当有输出的时候自动加载到editline

现在问题来了在当初写交互脚本的时候是可以检测到myxrgsu的输并且输入代码的
但是现在用这个程序的时候却检测不到任何输出
我想会不会是程序本身无输出于是写了一个bash 内容只有一句

myxrgsu

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用它来启动myxrgsu 我想着这个脚本既然在终端有输出那么应该可以检测到它的输出吧
结果发现输出仍然是空白

实在是想不明白了所以来请教
请高手们赐教

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zhtengw

deepin

2012-11-28 21:42

以下是qt帮助中关于readaAll()函数的说明，
QByteArray QIODevice::readAll ()
This is an overloaded function.

Reads all available data from the device, and returns it as a QByteArray.

This function has no way of reporting errors; returning an empty QByteArray() can mean either that no data was currently available for reading, or that an error occurred.

这个好像不能用来读取程序的输出。

不知你连接的信号和槽是怎样，请你把完整的代码贴上来。

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FEI17

deepin

2012-11-29 03:33

#include
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
cmd=new QProcess(this);
connect(cmd, SIGNAL(readyReadStandardOutput()), this, SLOT(readresult()));
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::on_pushButton_clicked()
{
ui->textEdit->clear();
this->cmdtext=ui->lineEdit->text();
cmd->start(cmdtext);
}
void MainWindow::on_lineEdit_lostFocus()
{
}
void MainWindow::readresult()
{
QTextCodec *data = QTextCodec::codecForName("UTF-8");
QString result = data->toUnicode(cmd->readAllStandardOutput());
ui->textEdit->append(result);
}
void MainWindow::on_outputbutton_clicked()
{
QTextCodec *data = QTextCodec::codecForName("UTF-8");
this->cmdresult=data->toUnicode(cmd->readAll());
ui->textEdit->append(cmdresult);
QString no="";
cmdresult=no;
}

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