Qt string与QString之间的转换

string str;

QString qstr;

//从QString 到 std::string

str = qstr.toStdString();

//从std::string 到QString

qstr = QString::fromStdString(str);

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std::string cstr;

QString qstring;

//从std::string 到QString

qstring = QString(QString::fromLocal8Bit(cstr.c_str()));

//从QString 到 std::string

cstr = string((const char *)qstring.toLocal8Bit());