The problem now is that I don't know how I can use qml live preview? I saw a video: https://vimeo.com/145921618
I saw this post about erase this function for Qt Creator. How i can implementlive coding into my app?
Perhaps you mean Terrarium?
Terrarium is a cross platform QML Playground: the view renders lively as you type in the editor, makes prototyping and experimenting with QtQuick a lot more fun!
It monitors changes in its TextEdit, and triggers the view to reload source from the local http server. If you're looking for a file system watcher implementation, please refer to QML LiveReload.
Or LiveReload?