Unsolved IOS module "QtQuick" is not installed

[niqt]

Hi,
i have a complex project (It's run on windows, linux and Android), now i'm porting on IOS. When i run it i have: "module "QtQuick" is not installed".
My project has a main .pro with templeate=subdir and subproject with template=app.
Directory structure:
Project
- mainproject.pro
< subproject
< qml
< other files

To fix same problem on android i added in subproject.pro QML_IMPORT_PATH="..", i have tried with iOS but nothing.
Can someone help me?