title: iOS - Does application:didFinishLaunchingWithOptions execute in main thread?
body: <p>I am wondering if an iOS app delegate's <code>application:didFinishLaunchingWithOptions:</code> method executes from within the main thread?</p>
  
  <p>Ultimately I would like to know whether it is safe to put UI code in this method and if I should keep blocking code (like network interactions) out of it.</p>
  
  <p>Thanks.</p>