title: Using Xcode storyboard causes Xcode to freeze, and Interface Builder Cocoa Touch Tool spikes to %99
body: <p>I'm using Xcode 6.0.1 to develop an iOS 8 app and I'm getting a new error that I never got when I was using Xcode 5 and iOS 7: when I use the story board builder, Xcode often freezes up with the spinning beach ball of doom (or whatever they call it). Sometimes, all it takes is moving an object in a view controller to cause this.</p>
  
  <p>I have noticed that, when this error happens, my Activity Monitor shows that the "Interface Builder Cocoa Touch Tool" process has a % CPU value of between 98 and 100! I have to force quit this process and force close Xcode (which is unresponsive). However, this doesn't solve the problem, because it comes back when I use the story board again later, and sometimes it comes back when I simply try to open Xcode.</p>
  
  <p>I have also tried restarting my computer and clearing out the derived data, neither of which have solved the problem. I also turned indexing off so that Xcode wouldn't index all my files and run really slowly. This didn't help though.</p>
  
  <p>I've seen other people with this same problem (using older versions of Xcode), but none of them have provided a solution that worked for me.</p>
  
  <p>Please help. Thanks.</p>