How to use std::string in a QLineEdit?

问题

I have the following problem. I am trying to integrate a large code written by me with a Qt interface.

Some of my functions return std::string. I did not succeed in making QLineEdit::setText accept them (other functions returning char do not give me problems).

What should I do? Thanks!
Giuseppe

回答1:

Try this:

std::string a = "aaa";
lineEdit->setText(QString::fromStdString(a));

You will need Qt with STL support.

回答2:

There's no constructor for QString that takes a std::string. Convert it first to a C string using std::string::c_str().

来源：https://stackoverflow.com/questions/1537164/how-to-use-stdstring-in-a-qlineedit