我最近静态编译了Qt 5.10.1(mingw32),现在下面的例程无法正常工作。我修改了代码以包含windows cmd“c:\ windows \ system32 \ cmd.exe”的完整路径,但仍然无效。尝试使用Windows 7& 10.下面的代码适用于Qt 5.6。它的工作是打开一个Windows终端。类似的代码在macOS和Linux中打开控制台。
注意:此行为是Qt 5.8中引入的错误,请参阅:
https://bugreports.qt.io/browse/QTBUG-57687
QString commstr = adbdir+"cpath.bat";
QFile file(commstr);
if(!file.open(QFile::WriteOnly |
QFile::Text))
{
logfile("error creating cpath.bat!");
QMessageBox::critical(this,"","Error creating bat file!");
return;
}
QTextStream out(&file);
out << "set PATH=%PATH%;"+QDir::currentPath()+";"<< endl;
file.flush();
file.close();
cstring = "cmd /k " +QDir::currentPath()+"/cpath.bat";
QProcess::startDetached(cstring);
答案 0 :(得分:2)
注意:startDetached的这种行为是Qt 5.8中引入的Windows特定的Qt错误。解决方法在以下位置引用:
https://bugreports.qt.io/browse/QTBUG-57687
QProcess p;
p.setProgram("cmd.exe");
p.setArguments({"/k", QDir::currentPath()+"/cpath.bat"});
p.setCreateProcessArgumentsModifier([] (
QProcess::CreateProcessArguments
*args) {
args->flags &= ~CREATE_NO_WINDOW;
});
p.startDetached();
答案 1 :(得分:0)
Qt 5.10中的正确方法是将参数传递给QProcess程序,因此当您想运行cmd /k cpath.bat
时,程序为cmd
且参数为/k xyz.bat
。另外根据错误报告QTBUG-64662,Qt确实启动了流程启动,但要使其显示,这可能与win32 API有关,因此可以使用QProcess::setCreateProcessArgumentsModifier
将shell显示为{{{ 3}}。
所以在你的情况下:
#include "Windows.h"
int main(int argc, char *argv[]) {
QApplication app(argc, argv);
QProcess process;
QString program = "cmd.exe";
QStringList arguments = QStringList() << "/K" << QDir::currentPath()+"/cpath.bat";
process->setCreateProcessArgumentsModifier([] (QProcess::CreateProcessArguments *args)
{
args->flags |= CREATE_NEW_CONSOLE;
args->startupInfo->dwFlags &= ~STARTF_USESTDHANDLES;
});
process.start(program, arguments);
process.waitForStarted();
return app.exec();
}
为了创建分离进程,您可以继承QProcess并在启动后将其分离,如下所示:
#include <QProcess>
#include <QString>
#include <QStringList>
#include <QDir>
#include "Windows.h"
class QDetachableProcess
: public QProcess {
public:
QDetachableProcess(QObject *parent = 0)
: QProcess(parent) {
}
void detach() {
waitForStarted();
setProcessState(QProcess::NotRunning);
}
};
int main(int argc, char *argv[]) {
QDetachableProcess process;
QString program = "cmd.exe";
QStringList arguments = QStringList() << "/K" << QDir::currentPath()+"/cpath.bat";
process.setCreateProcessArgumentsModifier(
[](QProcess::CreateProcessArguments *args) {
args->flags |= CREATE_NEW_CONSOLE;
args->startupInfo->dwFlags &=~ STARTF_USESTDHANDLES;
});
process.start(program, arguments);
process.detach();
return 0;
}