Question

我有一个QProcess处理程序类（processHandler）在我的GUI类中调用，如下所示：

this->thread = std::make_shared<QThread>();
this->proc   = std::make_shared<processHandler>();

this->proc->moveToThread(thread.get());

connect(this->thread.get(), SIGNAL(started()), this->proc.get(), SLOT(runProcess()));

runProcess中的processhandler.cpp SLOT定义如下：

#include "processhandler.h"

processHandler::processHandler(QObject *parent) : QObject(parent)
{
    this->proc = std::make_shared<QProcess>();
    connect(this->proc.get(), SIGNAL(readyReadStandardError()), this, SLOT(printError()));
    connect(this->proc.get(), SIGNAL(finished(int, QProcess::ExitStatus)), this, SLOT(onProcessFinished(int, QProcess::ExitStatus)));
}

processHandler::~processHandler(){}

void processHandler::runProcess()
{
    this->proc->setWorkingDirectory("path/to/application/dir");
    this->proc->start("command");
}

void processHandler::printError()
{
    QFile file("sys.log");
    if (file.open(QIODevice::WriteOnly | QIODevice::Append))
    {
        QTextStream stream(&file);
        QByteArray byteArray = this->proc->readAllStandardError();
        QStringList strLines = QString(byteArray).split("\n");
        QString now = QTime::currentTime().toString();
    stream << "\n" << "Error Occurerd [" + now + "]: ";
        foreach (QString line, strLines)
        {
            stream << line << endl;
        }
    }
    file.flush();
    file.close();
}

void processHandler::onProcessFinished(int exitCode, QProcess::ExitStatus status)
{
    QFile file("sys.log");
    if (file.open(QIODevice::WriteOnly | QIODevice::Append))
    {
        QTextStream stream(&file);
        QString now = QTime::currentTime().toString();
        stream << "\n" << "Process Exit [" + now + "]: " << QString::number(exitCode) << " with status " <<  QString::number(status);
    }
    file.flush();
    file.close();

    emit processFinished();
}

我的thread课程（GUI）内部this->thread->start();开始后，我收到以下消息：

QObject: Cannot create children for a parent that is in a different thread.
(Parent is QProcess(0x15c50cc), parent's thread is QThread(0x15526f0), current thread is QThread(0x15bb654)

我从消息中了解到，processHandler的孩子生活在另一个（main？）主题中。但我没有找到任何关于堆栈溢出的逐步解释，如何在转移到thread之前创建这些孩子。我错过的所有提示或链接都非常感激。

将工人的孩子转移到QThread - ＆gt; QObject：无法为位于不同线程中的父级创建子级

0 个答案: