title: Change color-theme in whole iOS application
body: <p>I am going to implement Alert feature in my application.</p>
  
  <p>When user taps an alert button my application is about to change all orange (default) colors to red (Navigation bar, switches, Tab bar, Buttons, views and other stuff).</p>
  
  <p>I want to implement it using "css" files also known as stylesheets.
  I've found two libraries: <a href="https://github.com/erichoracek/motif" rel="nofollow">Motif</a> and <a href="https://github.com/tombenner/nui" rel="nofollow">NUI</a>.</p>
  
  <p>The most important problem is to dynamically change theme inside application. Motif can do this but I want to do it more simple.</p>
  
  <p>Also I learned that NUI can change the app theme too but I can't to change it dynamically.</p>
  
  <p>P.S. I am using storyboard and XIB-files. I need to add runtime attribute  for object's key-path. This attribute will go to my stylesheet file and apply styles. It's the most simple way I think.</p>
  
  <p>Can I do it simply and without any libraries?</p>
  
  <p>P.S.S. NUI is more simple for me. Maybe you know how to change styles when application runs.</p>