title: Xcode- terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSArrayI length]: unrecognized selector sent to instance
body: <p>I don't know what is wrong with my code but when I run the app and click on something to see a detailed view it crashes and shows what is on the screen shot.
  What should i do?
  What code should i change?
  Just ask if you need more screen shots.
  Thanks!</p>
  
  <p>Screen shot- <a href="https://plus.google.com/106403207283231647090/posts/eLDJ7V97HVr" rel="nofollow">https://plus.google.com/106403207283231647090/posts/eLDJ7V97HVr</a></p>
  
  <p>I have tried nothing so far as i have no idea what to do.</p>