很抱歉误导了 QDesktopService::URL,后来我明白它不会接受参数。
因此,通过改进错误处理来实现,如果进程没有启动/退出错误或等待进程完成任务..我认为这很有用
在 QProcess 中,execute 是阻塞线程,而 start 是恢复线程。
当前代码正在使用 start() API,但或多或少的功能类似于 execute..
代码是从SO复制而来的,并且针对当前要求进行了少量修改。
> 主窗口.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QProcess>
#include <QShortcut>
#include <QDebug>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
cameraControl = new QProcess(this);
}
MainWindow::~MainWindow()
{
delete ui;
cameraControl->close();
delete cameraControl;
}
void MainWindow::on_pushButton_clicked()
{
// connect the camera control finished signal to the slot that will read the exit code and
// place the std output string from the process into a label on the form
connect(cameraControl, SIGNAL(finished(int , QProcess::ExitStatus )),
this, SLOT(on_cameraControlExit(int , QProcess::ExitStatus )));
// Disable the ui button do we don't get double presses
ui->pushButton->setDisabled(true);
// setup the gphoto2 arguments list
QStringList args;
args.append("d:\\text.txt");
// start the camera control
cameraControl->start("notepad",args);
// // wait for the process to finish or 30 seconds whichever comes first
cameraControl->waitForFinished(30000);
}
void MainWindow::on_cameraControlExit(int exitCode, QProcess::ExitStatus exitStatus)
{
qDebug() << cameraControl->errorString();
qDebug() << cameraControl->readAllStandardError();
qDebug() << cameraControl->readAllStandardOutput();
ui->pushButton->setEnabled(true);
}
主窗口.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QString>
#include <QProcess>
#include <QObject>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
void reply2();
private slots:
void on_pushButton_clicked();
void on_cameraControlExit(int exitCode, QProcess::ExitStatus exitStatus);
private:
Ui::MainWindow *ui;
QProcess* cameraControl;
};
#endif // MAINWINDOW_H
#include "mainwindow.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}