QStringList strList;
strList << "1" << "2" << "3" << "4";
QString str = strList.join("-");
qDebug()<<str;
-----------------------------------
输出:"1-2-3-4"
QStringList strList;
strList << "1" << "2" << "3" << "4";
QString str = strList.join("-");
qDebug()<<str;
-----------------------------------
输出:"1-2-3-4"