title: SceneKit SCNLookAtConstraint could not overload init
body: <p>In the example project of <code>sceneKit</code> I am trying to make the camera look at the ship object which I have offset from the center. But for some reason I am unable to do it.</p>
  
  <p>I use the following code to look at the ship. but it still gives as error:</p>
  
  <blockquote>
    <p>Could not find an overload for init. </p>
  </blockquote>
  
  <p>I am using <strong>swift</strong> to code.</p>
  
  <pre><code>cameraNode.constraints = SCNLookAtConstraint(ship)
  </code></pre>
  
  <p>pls help. Thanks.</p>