I would like to know how to enable " Kit selection" and also how to create a file to

hello , I have this problem of not being able to open the " qt widgets application" due to the fact that " Kit" not be found, and also I am unable to create.


also like to know how to create a file in "ui " to add the actions of qgis.

Ty,

http://doc.qt.io/qtcreator/creator-targets.html

It is unclear what the second part of your post means. Do you want to build a UI that looks like something from QGIS, or are you expecting QGIS widgets to appear in the Designer to be dragged and dropped, or something else?