title: Help with multi-threading on iOS?
body: <p>I have an application which utilizes OpenEars and the Flite library. The problem is that the Flite library is resource intensive and it's freezing up my app. I suspect that running Flite on a background thread will fix things, but I have <em>no</em> idea how to do so. </p>
  
  <p>That said, <strong><em>how do I implement a background thread in iOS</em></strong>?</p>
  
  <p>I'd appreciate if anyone can point me to some tutorials, share some sample code, or any general advice that would help me solve this problem.</p>