Qt错误：'const class QString'没有名为'toStdString'的成员

Question

我收到此错误error: 'const class QString' has no member named 'toStdString'虽然QString有错误。 (link)。

代码

    std::string Message::toStdString() const 
    {
        return m_string.toStdString();
    }

Answer 1

直接从这里复制答案：

How to convert QString to std::string?

QString qs;

// Either this if you use UTF-8 anywhere
std::string utf8_text = qs.toUtf8().constData();

// or this if you on Windows :-)
std::string current_locale_text = qs.toLocal8Bit().constData();