把QString写到文件中可以用toutf8()函数

把QString写到文件中可以用toutf8()函数

QByteArray QString::toUtf8() const

Returns a UTF-8 representation of the string as a QByteArray.

UTF-8 is a Unicode codec and can represent all characters in a Unicode string like QString.

原文：https://www.cnblogs.com/confusion/p/9245054.html