objective c - iOS Instagram profile View and scrolling -

how did instagram developers make profile view switch between uicollectionview , uitableview?

i got 2 solutions:

1. uiscrollview contains uiview @ top, , uiview holds uicollectionview , uitableview , delegates scrolling these views?
2. or uitableview , uicollectionview top insests @ each view?

which 1 better, think? may provide other solutions?