Qt：QString与std::string的相互转换

版权声明：假装这里有个版权声明…… https://blog.csdn.net/CV_Jason/article/details/89105122

string转QString

string str = "hello wrold!";
QString qstr = QString::fromStdString(str) ;

QString转string

QString qstr = "hello wrold!";
string str = qstr.toStdString() ;