title: iOS 15: Remove empty space before cells in UITableView
body: <p>I am using <code>UITableView</code> for a multi-section list. The issue I am seeing is a space above the cells of each section, even if I set <code>tableView(_:heightForHeaderInSection:)</code> to be 0. This occurs even when there is only one section and I set <code>tableView(_:viewForHeaderInSection:)</code> to be <code>nil</code>.</p>
  <p>I have tried all other answers on StackOverflow relating to inset overrides/edge expanding but none have worked.</p>
  <p>Example:</p>
  <p><a href="https://i.stack.imgur.com/Ejxsol.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/Ejxsol.jpg" alt="Screenshot of iOS table view. Above each section header is a gap which is the same colour as the table background." /></a></p>