How to make ui responsive all the time and do background updating?

Question

I am creating a application which displays 8 thumbnails per page and it can have n pages. Each of these thumbnails are UIViews and are added to UIScrollView. However i have

Answer 1

I was having a similar problem.
What i did was at an instance i kept only 3 pages in the memory and cleared remaining all.
If suppose there are 3 screens s1, s2, s3. And the user is viewing s2. Whenever he scrolls to s3 i will remove s1 and load a new page s4.
So that the users will have a better experience. And less memory will be occupied.