title: Instance will be immediately deallocated because property 'imageView' is 'weak'
body: <p>I am trying to update my App to Xcode 10 (iOS 12) and editor show me a lot of this Warning messages:</p>
  
  <p><strong>Instance will be immediately deallocated because property 'imageView' is 'weak'</strong></p>
  
  <p>All these warnings (I have many, really, really many) appear with UIImageView outlets.</p>
  
  <pre><code>@IBOutlet weak var imageView : UIImageView!
  
  let logo = UIImage(named: "Cartoon.png")
  
  imageView = UIImageView(image:logo)
  </code></pre>
  
  <p>Warnings appear in this kind of line:</p>
  
  <pre><code>imageView = UIImageView(image:logo)
  </code></pre>
  
  <p>Some ideas?</p>