我使用Qt来实现允许为嵌入式系统开发的接口。
我面临一个问题:为了将程序闪存到嵌入式系统中,我使用QProcess,以便使用命令“ make”和“ make flash”。为了没有任何问题,该程序可以成功编译。
但是,当我尝试对“ make flash”执行相同的操作时,会出现问题,因为控制台正在等待用户输入,他必须按下嵌入式系统上的按钮。
但是QProcess仅在脚本完成时才返回标准输出,因此我没有消息“按下按钮”。
所以我的问题是:我怎么知道QProcess需要用户输入的时间?还是如果不可能,如何使用Qt动态打开控制台并启动命令?
我想在这里说什么:https : //www.qtcentre.org/threads/47538-QProcess-read-from-stdout-lively
这是我的代码:
compilator->start("make flash");
compilator->waitForFinished();
QByteArray errors = compilator->readAllStandardError();
QString stringError(errors);
QByteArray message = compilator->readAll();
QString stringMessage(message);
m_logForm->setText("Project path : "
+ pathProject + "\n"
+ "Flash finished with exit code " + QString::number(compilator->exitCode()) + "\n"
+ stringError + "\n"
+ stringMessage + "\n");
其中m_logFrom是用于在我的界面中显示控制台报告的类
[编辑]我尝试了弗拉基米尔所说的。不幸的是,我没有我的资料,所以我无法对其进行测试,但是为了测试,我已经完成了这个脚本(test.bat):
set /p answer=Do you want to create it now (Y/N)?
这是我的新代码:
QProcess *compilator = new QProcess(this);
connect(compilator, &QProcess::readyReadStandardOutput, [compilator, this](){
QString output =compilator->readAll();
qDebug() << "output: "<< output;
m_logForm->setText("Flash finished with exit code " + QString::number(compilator->exitCode()) + "\n"
+ output + "\n");
});
connect(compilator, &QProcess::readyReadStandardError, [compilator, this](){
QString err = compilator->readAllStandardError();
qDebug() << "error: "<<err;
m_logForm->setText("Flash finished with exit code " + QString::number(compilator->exitCode()) + "\n"
+ err + "\n");
});
m_logForm->setText("Flashing to serial port "+m_Serial + "\n");
compilator->setWorkingDirectory(pathProject);
compilator->start("test.bat");
}
却无能为力
我的test.bat
set /p answer=Do you want to create it now (Y/N)?
echo "user response:" %answer%
pause
该代码启动批处理命令,读取其输出,并将答案写入过程:
QProcess *compilator = new QProcess(this);
connect(compilator, &QProcess::readyReadStandardOutput, [compilator, this]()
{
QString output = compilator->readAllStandardOutput().simplified();
qDebug().noquote() << "output: " << output;
if (output.contains("(Y/N)?", Qt::CaseInsensitive))
{
compilator->write("Y\n"); // write our answer to the process
}
else if (output.contains(". . .", Qt::CaseInsensitive))
{
compilator->write("\n"); // simulate press any key to process
}
});
connect(compilator, &QProcess::readyReadStandardError, [compilator, this]()
{
QString err = compilator->readAllStandardError().simplified();
qWarning().noquote() << "error: " << err;
});
// Handle the finished() signal:
connect(compilator, QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished),
[compilator, this](int exitCode, QProcess::ExitStatus exitStatus)
{
qDebug() << "compilator process finished with exit code =" << exitCode
<< "and exit status =" << exitStatus;
});
compilator->start("test.bat");
if (compilator->waitForStarted()) // use to check start errors
{
qDebug() << "compilator process started ok";
}
else
{
qCritical() << "compilator process start FAILED:" << compilator->errorString();
}