How can I modify an existing UIViewController to allow scrolling?

Question

I have already built a UIViewController subclass with a bunch of controls in it, and just realized that if I rotate the iPhone, half of the controls become invisible. So, I would like to somehow make the UIViewController's UIView scrollable so that when the device (or the Simulator) rotates, the user can scroll the view to see all the controls.

I was hoping to do this all in Interface Builder. I tried to change the class of the view from UIView to UIScrollView in the Class Identity editor, but nothing scrolls. The base class of my view controller is a simple UIViewController <UIScrollViewDelegate>.

Is there an easy way to make the main view in my view controller scrollable without having to recreate the whole thing in IB?

Answer 1

It would be helpful to understand what your interface is displaying, but I'd suggest one of the following:

1. Don't allow rotation by returning NO from shouldAutorotateToInterfaceOrientation
2. Use Interface Builder to adjust your springs and struts so that all of your interface elements fit in landscape view
3. Add a new UIScrollView in Interface Builder and drag your UIView into it, then re-assign the view property of your File's Owner to the scroll view.

Answer 2

For people who are using storyboard, this is quite easy to do

• in Document Outline select the topmost View of the UIViewController
• then in Identity Inspecter, under Custom Class, for class enter UIScrollView

That's it.