Have you tried the ui::EditBox? It’s a native, probably doesn’t look as good, but supports all regular features. On android I believe both just open a separate native text field regardless?
CocoStudio is deprecated and no longer updated since a few years back.
The parsing library has various UI components or wrappers on top of widgets that help with rendering the CocoStudio scene definitions and its nodes hierarchy.
You may be able to use TextFieldEx by itself without having to use anything related to CocoStudio itself. But you’ll have to figure out how to create and set the fields on an instance of it properly.