title: Why .pch file not available in swift?
body: <p>In swift, Prefix.pch file is not provided. In my project, I want to declare some macros globally and use through out application.</p>
  
  <p>Can anyone give me suggestion how to do it, Where to declare?</p>
  
  <p>Is there any other file replaced by Prefix.pch file in swift?</p>