how to implement zoom and pinch zoom effect in application same as photo application?

Question

i hve have implemented photo application same as photo application.Now i want to implement zoom and zoom pinch functionality same as photo application.Please provide me any code or document.

Thanks in advance

Answer 1

Place your image in a UIScrollView and it'll deal with all of that for you. Read Apple's Scroll View Programming Guide and its various subsections on zooming to learn how to implement it in your application.