title: Center an icon image which is inside image which is inside stackview
body: <p>Hey guys i want to center an image inside an image which is inside stackview.</p>
  
  <pre><code>let stackview = UIStackView()
  stackview.addArrangedSubview(imageview)
  imageview.addSubview(anotherimageview)
  </code></pre>
  
  <p>I want anotherimageview centered which is an icon image.</p>