Take a look at the WWDC videos from either 2010 or 2011... "Advanced Scroll 
View Techniques" I think was the title. These topics are covered in some depth. 

You will likely also want to examine UIScrollView's -pagingEnabled property as 
relates to your second question. 

(Sent from my iPhone.)

--
Conrad Shultz
Synthetiq Solutions

On Jan 9, 2012, at 1:09, Ken Tabb <k.j.t...@herts.ac.uk> wrote:

> Morning folks & Happy New Year,
> 
> I've got an iOS app that needs to have a UIScrollView containing a horizontal 
> row of UIImageViews, all the same size. The UIScrollView will be a subclass 
> as I need it to implement some additional behaviour, but I've got 2 questions 
> which may already be built in (but I can't find anything relating to it):
> 
> [1] Is there an easy way of looping the scrolling (so that you don't hit 
> either end of scrolling, you keep going around and around)?
> 
> [2] Is there any way to, upon decelerating, ensure that one of the imageviews 
> is always centred in the scrollview? Ideally with swish decelerating taking 
> place, looking like the user lined it up perfectly each time the scrolling 
> comes to rest.
> 
> Thanks in advance for any pointers,
> Ken
> 
> - - - - - - - - - -
> Dr. Ken Tabb
> Mac, iOS & UNIX Developer - Health & Human Sciences
> Machine Vision & Neural Network researcher - School of Computer Science
> University of Hertfordshire, UK
> 
> 
> 
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