title: Is there any viewDidAppear method for UIView (not UIViewController)?
body: <p>I need to understand when UIView appears on the screen, so I need an analogue of the viewDidAppear method.</p>
  
  <p>I found a UIView lifecycle:</p>
  
  <ol>
  <li>willMoveToSuperview</li>
  <li>invalidateIntrinsicContentSize</li>
  <li>didMoveToSuperview</li>
  <li>awakeFromNib</li>
  <li>willMoveToWindow</li>
  <li>needsUpdateConstraints</li>
  <li>didMoveToWindow</li>
  <li>setNeedsLayout</li>
  <li>updateConstraints</li>
  <li>layoutSubviews</li>
  <li>drawRect</li>
  </ol>
  
  <p>I tried all of these methods, but I didn't get an answer.</p>