How to add action on the more scroll than data in UITableview iPhone?

I want t开发者_如何学运维o add some action or call a method when user scroll more than the data available in the UITableView. I mean in most of the iPhone app you have seen people add refresh while scrolling more than the cells available in the UITableview. In the same manner I also want to call a particular method or selector when user scroll more than the cell available in the table.

Provide me a some sample code or any tutorial if possible...

Edit: "Hey I found the answer of my quesn by googling it. this link helped me. http://github.com/chpwn/PullToRefreshView