Keeping buttons on top while content changes underneath

I am trying to create a view with buttons that overlay a scrollview and stay visible while the content underneath scrolls. T开发者_如何学Pythonhese buttons, when pressed, will change the content underneath.

I am a fairly competent developer but need a little bit of direction with this problem, any help will be much appreciated.

Cheers

Embed the scroll view within another view, then add the button to this outer view. Add content you want to scroll to the scroll view, and the button should stay stationary.