NSScrollView doesn't work xcode 4

I made an nsscrollview in the interface builder of xcode 4 and i put buttons inside of it's view. The scrollview is clipping the content of the view instead of scrolling it. How come it won't s开发者_如何学Pythoncroll?

You'll need to:

• Make sure the buttons are inside the scroll view's content view.

• Make sure that the content view is large enough that it'll scroll. If it's the same size as the scroll view, or smaller, it won't scroll. A scroll view is meant to display a portion of a larger view; if the whole view is already displayed, there's no reason to do any scrolling.