title: iphone: get User Defined variable in Target's setting by code?
body: <p>My project have multi-targets. Each target has its own <code>Class</code> file for setting stuff. I want to store that <code>Class</code> name in a target setting (<code>Info.plist</code> or Target's Building setting). So that I can define which class I need to use in each target based on this setting.</p>
  
  <p>According to <a href="https://stackoverflow.com/questions/2989127/using-info-plist-for-storing-target-specific-values-for-a-multi-target-app">this question</a>, I put "a target-specific <code>User Defined</code> variable" in each Target's Building Setting.</p>
  
  <p>But don't know how to get it back in my code?</p>