Viewing and editing multi-line text notes
Notescroll could solve your problem.
Notescroll is a fast and easy to use note-taking app syncing with Dropbox and Box.
It brings the way you browsing all your notes exactly like iBook, even containing table of contents and page numbers.
And it is excellent at editing long notes.
I just tried to use this app but found I had some problems. I assume you are a VoiceOver user? If so, how successful have you been in using the NoteScroll app? The app description is just what I have been looking for but the practical uses of the app leaves a lot to be desired so far, at least. Any helpful hints in using the app would be appreciated.