ios - Textview will not scroll -

i have view root view scrollview. scrollview wraps textview amongst other images etc.

when there large amount of text in textview in order scroll bottom first have make sure have scrolled top of view root scrollview, otherwise the textview not scroll.

it seems root scrollview has focus if has been scrolled , therefore tetview cannot scroll.

so question - way textview , root scroll should interact , there way allow focus on textview scroll without having scroll top of main view using root scroll?

thanks in advance