Why doesn't Qt Creator see std::vector element methods?

Question

Qt

The question does not seem to be difficult. In general, we create a vector, for example: Then, a problem arises in Qt Creator:
std::vector<std::string> vStd;

vStd.at(0).  //<-в этот момент должен появится список методов std::string

After writing the dot, a list of the string class should appear.
In VS this is true, but for some reason this does not appear in Qt Creator.
How to fix it?
(Yes, in Qt Creator, you need to use exactly std elements)
The images below explain what I mean:
VS2013

Qt Creator

Answer 1

Enable Clang code model

Answer 2

Pretty strange. Does the project compile?
In any case, check out Options->Build & Run->Kits/Compilers/Qt Versions. And all the way.
PS
And the code model changes on the Options->C++->Code Model tab. I just doubt that you have the clang installed and all the paths are registered, or what needs to be done on Windows.