Question

因此，在我现在的代码中，它可以毫无问题地加载gphoto2并添加--- shell开关。如何添加一行来向该shell发出命令我想要发给shell的命令是＆＃34; start-preview-stream＆＃34;再次感谢！

    QProcess gphoto2;
    gphoto2.start("gphoto2", QStringList() << "--shell");
    if (!gphoto2.waitForStarted()){
        qDebug("gPhoto2 didn't start properly");
        return 1;
    }

    qDebug("gPhoto2 Started Successfully");

调试显示

gPhoto2 Started Successfully

我也试过以下但没有运气

QProcess gphoto2;
        gphoto2.start("gphoto2", QStringList() << "--shell" << "start-preview-stream");
        if (!gphoto2.waitForStarted()){
            qDebug("gPhoto2 didn't start properly");
            return 1;

        }

        qDebug("gPhoto2 Started Successfully");

Answer 1

如果您只需要将该字符串发送到流程的标准输入流，则需要write()到QProcess：

QProcess gphoto2;
gphoto2.start("gphoto2", QStringList() << "--shell");
if (!gphoto2.waitForStarted()){
    qDebug("gPhoto2 didn't start properly");
    return 1;
}

qDebug("gPhoto2 Started Successfully");

gphoto2.write("start-preview-stream\n");

（显然，您需要添加一些适当的返回值检查等。）

一旦启动，就向QProcess发出命令

1 个答案: