How to get a UITableView's visible sections?

Question

UITableView provides the methods indexPathsForVisibleRows and visibleCells, but how can I get the visible sections?

Answer 1

UITableViews store their cells using an NSIndexPath. As a result there is no object for sections. Using the following code we can traverse the table and perform operations using the indexes of visible sections (I'm not sure why you want visible sections since visible only means they are currently on the screen, but whatever).

for (NSIndexPath* i in [yourTableViewName indexPathsForVisibleRows])
{
  NSUInteger sectionPath = [i indexAtPosition:0];
  //custom code here, will run multiple times per section for each visible row in the group
}