Question

Is there a method of programmatically controlling a UIScrollView? As in, getting a value for its location, so how far along it is scrolled and things and change its position, scroll it programmatically?

Answer 1

I don’t know what either of @Alexandergre or @JAgostoni are talking about. Scrolling in UIScrollView is really easy.

I suggest you take a look at the documentation for UIScrollView:
http://developer.apple.com/library/ios/#documentation/uikit/reference/UIScrollView_Class/Reference/UIScrollView.html

To scroll a UIScrollView, simply use

- (void)scrollRectToVisible:(CGRect)rect animated:(BOOL)animated

Example:

[myScrollView scrollRectToVisible:CGRectMake(20, 20, 320, 480) animated:YES];

That will scroll a UIScrollView with animation to a 20 on the x axis, 20 on the y and 320×480 height and width.

If you want to get information of the view it self(for example what frame is visible) you should use methods and properties from UIView, as it’s UIScrollView’s parent.
Check out the UIView documentation at: http://developer.apple.com/library/ios/#documentation/uikit/reference/UIView_Class/UIView/UIView.html

To get the frame that is visible, use

myScrollView.frame;

Do not mix it up with the content size

myScrollView.contentSize;

But, as i said. Use the documentation!