How to make dynamically adding of rows when user reached to the last row of the UITableView?

Question

I have a UITableview which shows 10 rows currently which is fixed static. Now I want to add a feature into it. I want to add a more 10 rows to the table when user r

Answer 1

It is actually quite simple. What you need to do is implement the tableView:willDisplayCell:forRowAtIndexPath: method, which belongs to the UITableViewDelegate protocol. This method hits every time a cell is about to be displayed. So, it will let you know when the last cell is about to be displayed. Then you could do something like-

– (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *) cell forRowAtIndexPath:(NSIndexPath *)indexPath 
{
     if(indexPath.row == [self.array count] - 1) //self.array is the array of items you are displaying
     {
          //If it is the last cell, Add items to your array here & update the table view
     }
}

Another (a bit mathematical) option is to implement UIScrollView delegate methods (UITableView is a subclass of UIScrollView), namely scrollViewDidEndScrollingAnimation: or scrollViewDidScroll:. These will let you know the y-position of the content the user is viewing. If it is found that the bottom most content is visible, you can add more items.

HTH,

Akshay