How can I make a UITextField move up when the keyboard is present – on starting to edit?

With the iOS SDK:

I have a UIView with UITextFields that bring up a keyboard. I need it to be able to:

1. Allow scrolling of the contents of the UIScrollView to see the other text fields once the keyboard is brought up

2. Automatically “jump” (by scrolling up) or shortening

I know that I need a UIScrollView. I’ve tried changing the class of my UIView to a UIScrollView, but I’m still unable to scroll the textboxes up or down.

Do I need both a UIView and a UIScrollView? Does one go inside the other?

What needs to be implemented in order to automatically scroll to the active text field?

Ideally as much of the setup of the components as possible will be done in Interface Builder. I’d like to only write code for what needs it.

Note: the UIView (or UIScrollView) that I’m working with is brought up by a tabbar (UITabBar), which needs to function as normal.

I am adding the scroll bar just for when the keyboard comes up. Even though it’s not needed, I feel like it provides a better interface because then the user can scroll and change textboxes, for example.

I’ve got it working where I change the frame size of the UIScrollView when the keyboard goes up and down. I’m simply using:

-(void)textFieldDidBeginEditing:(UITextField *)textField {
    //Keyboard becomes visible
    scrollView.frame = CGRectMake(scrollView.frame.origin.x,
                                  scrollView.frame.origin.y,
    scrollView.frame.size.width,
    scrollView.frame.size.height - 215 + 50);   // Resize
}

-(void)textFieldDidEndEditing:(UITextField *)textField {
    // Keyboard will hide
    scrollView.frame = CGRectMake(scrollView.frame.origin.x,
                                  scrollView.frame.origin.y,
                                  scrollView.frame.size.width,
                                  scrollView.frame.size.height + 215 - 50); // Resize
}

However, this doesn’t automatically “move up” or center the lower text fields in the visible area, which is what I would really like.