title: Make a fixed size UIView, like UISwitch (using IBDesignable)
body: <p>When I'm using <a href="http://iphonedev.tv/blog/2014/12/15/create-an-ibdesignable-uiview-subclass-with-code-from-an-xib-file-in-xcode-6">this guide</a> to create a view that is designed in a XIB, reusable from within a storyboard using the IBDesignable attribute on my UIView subclass, how do I make it have a fixed size, and have its resizing behavior match that of a view like UISwitch?</p>
  
  <p>With "resizing behavior" I also mean while designing in interface builder.</p>