title: How to update swift Layout Anchors?
body: <p>Trying to find a solution to update multiple constraints for multiple UI elements on an event. I have seen some examples of deactivating, making a change, then reactivating constraints, this method seems impractical for the 24 anchors I am working with.</p>
  
  <p>One of my sets of changes:</p>
  
  <pre><code>ticketContainer.translatesAutoresizingMaskIntoConstraints = false
  ticketContainer.topAnchor.constraintEqualToAnchor(self.topAnchor).active = true
  ticketContainer.leftAnchor.constraintEqualToAnchor(self.rightAnchor, constant: 20).active = true
  ticketContainer.widthAnchor.constraintEqualToConstant(200.0).active = true
  
  ticketContainer.leftAnchor.constraintEqualToAnchor(self.leftAnchor, constant: 20).active = true
  ticketContainer.widthAnchor.constraintEqualToConstant(100.0).active = true
  </code></pre>