title: Autolayout - Position by Percentage
body: <p>I'd like to map dots along a line. </p>
  
  <p><img src="https://i.stack.imgur.com/X1QWf.jpg" alt="line across screen"></p>
  
  <p>The line length depends on device and orientation and is always stretched across the whole screen. Therfore it would make most sense to me to <strong>position</strong> the dots using a <strong>relative percentage</strong> value.</p>
  
  <p>So far I only found constraints being defined in some sort of point value (<a href="https://developer.apple.com/library/ios/#documentation/UserExperience/Conceptual/AutolayoutPG/Articles/constraintFundamentals.html#//apple_ref/doc/uid/TP40010853-CH2-SW2" rel="noreferrer">Doc</a>)</p>
  
  <p>Is it possible to use percentage values as constraints as well? Any ideas on how to position these dots in a scalable way ... or do I need do this conversion/positioning "manually"?</p>