title: ambiguous reference to member animate
body: <p>I use this code in viewDidAppear method</p>
  
  <pre><code>UIView.animate(withDuration: 0,5, delay: 0.5,
                 usingSpringWithDamping: 0.5, initialSpringVelocity: 0.0,
                 options: [], animations: {
                  self.loginButton.alpha = CGFloat(1.0)
  }
                  , completion: nil)
  </code></pre>
  
  <p>in the picture below I have a problem which I can't fix</p>
  
  <p><a href="https://i.stack.imgur.com/PE0T9.png" rel="nofollow noreferrer">problem</a></p>