title: 'NSUnknownKeyException'
body: <p>I try to do very simple application for ios. Switching between viewes. And when it started this error in log:</p>
  
  <pre><code>Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[&lt;UIApplication 0x712d520&gt; setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key goToAuthorizeView.'
  *** First throw call stack:
  (0x1c8c012 0x10c9e7e 0x1d14fb1 0xb76711 0xaf7ec8 0xaf79b7 0xb22428 0x22e0cc 0x10dd663 0x1c8745a 0x22cbcf 0x22e98d 0x10ceb 0x11002 0xfed6 0x21315 0x2224b 0x13cf8 0x1be7df9 0x1be7ad0 0x1c01bf5 0x1c01962 0x1c32bb6 0x1c31f44 0x1c31e1b 0xf7da 0x1165c 0x1b6d 0x1a95)
  libc++abi.dylib: terminate called throwing an exception
  </code></pre>