c++ - Qt QProcess::finished()信号没有这样的插槽

我正在尝试从Linux中运行的Qt应用程序运行命令行程序gphoto2，并读取将其输出到“标准输出”和“标准错误”的结果。这个概念证明程序中的GUI是一个按钮和一个标签，用于显示标准错误和标准输出的输出。

我在将QtProcess::Finished信号连接到正确的插槽时遇到问题。我从头文件，connect语句和函数的Finished()信号文档中复制了参数列表。函数名称以MainWindow::类标识符为前缀。我已经没有足够的尝试来尝试了，我希望StackOverflow中的某个人能够指出问题所在。

The Header file:
#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

mainwindow.cpp文件

#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(MainWindow::on_cameraControlExit(int exitCode, QProcess::ExitStatus 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("--capture-image-and-download");

    // start the camera control
    cameraControl->start("gphoto2",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);

}

最佳答案

我相信以下方法会起作用:

connect(cameraControl，SIGNAL(finished(int，QProcess::ExitStatus))，this，SLOT(on_cameraControlExit(int，QProcess::ExitStatus)));

关于c++ - Qt QProcess::finished()信号没有这样的插槽，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/12534367/