Why we are checking if (cell == nil) in UITableViewController?

Question

I am trying to implement UITableView based Application.For that I select UITableViewStyle is Group.In my TableView their is 15 section each section having 1

Answer 1

The test if (cell == nil) handles the case where there are no reusable cells to dequeue, in which case you must create a new cell. When you create the new cell, you are responsible for constructing its view hierarchy.