title: Remove line UISearchBar with UISearchDisplayController when remove the background color
body: <p>I have added with help of interface builder a <code>UISearchBar</code> With <code>UISearchDisplayController</code> in my <code>UITableView</code>. I know how to set the background color of <code>UISearchBar</code>, I do it this way:</p>
  
  <pre><code>for (UIView *subview in self.searchBar.subviews) {
          if ([subview isKindOfClass:NSClassFromString(@"UISearchBarBackground")]) {
  
              [subview removeFromSuperview];
          }
      }
  </code></pre>
  
  <p>but you can see, there is a line, that I can't understand , and how to remove it, that scroll with the searchbar:</p>
  
  <p><img src="https://i.stack.imgur.com/W2vrP.png" alt="enter image description here"></p>
  
  <p>if I insert with interface builder only a <code>UISearchbar</code> without <code>UISearchDisplayController</code> there isn't that line, how I can remove that line?</p>