Adding a scroll view behind view

Hey, I've been trying to add a scroll view to my view for sometime now an开发者_Python百科d I can't seem to get it work. I've been trying some tutorials without luck. Could anyone aid me in this? It is just basically a normal view with some buttons on it.

Thanks.

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The most common mistake I've seen with UIScrollView usage is forgetting to set contentSize. contentSize needs to be bigger than the size of the UIScrollView for scrolling to make sense.