Scroll View not functioning IOS 7

There are two ways you can get the scrolling to work.

Approach 1 (with code):

1) Pin UIScrollView to the sides of its parent view, as mentioned below.

2) Set content size of your scroll view in viewDidLayoutSubviews:

- (void)viewDidLayoutSubviews {
    self.MainScroll.contentSize = CGSizeMake(320, 1800);
}

Approach 2 (pure IB, no code required):

1) Setting contentSize is not required if using AutoLayout. You need to pin your UIScrollView to the parent view as mentioned below:

2) Then add another UIView inside UIScrollView to act as a content view and pin it to the UIScrollView and move all controls inside this content view:

3) Pin content view to its parent scroll view as mentioned below:

4) Set your UIViewController's Simulated Metrics to Freeform (this is important):

5) Size your content UIView to your desired height (obviously important too):

Apple article explaining UIScrollView and AutoLayouts: https://developer.apple.com/library/content/technotes/tn2154/_index.html