title: UIView with container and UITableView: no scroll indicator
body: <p>I made a view with a dynamic tableView and a container (that appears to add items in table). The view class complies with <code>UIViewController, UITableViewDelegate, UITableViewDataSource</code> and others. Table View has <code>showsVerticalScrollIndicator</code> and <code>scrollEnabled</code> on.</p>
  
  <p>The interface is built with Interface Builder. Container is managed with segue and separate class, that has only one line: <code>@IBOutlet weak var containerTextField: UITextField!</code> in body, so it seems not to interfere with scroll indicators of the main view somehow.</p>
  
  <p>But scroll indicator is not displayed, even when <code>flashScrollIndicators()</code> fires. Please, give me a hint, what could go wrong?</p>
  
  <p><strong>Upd.</strong> My bad. I meant a <strong>vertical indicator</strong> instead of a horizontal one. Casual vertical scroll indicator, that is also enabled in the Table View properties list.</p>
  
  <p><strong>Upd2.</strong> Screenshot: there is a container view with a text field right under the navigation bar. Screenshot taken on scroll, yet no vertical indicator visible.</p>
  
  <p><a href="https://i.stack.imgur.com/PWAM4.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PWAM4.png" alt="Screenshot"></a></p>