title: libc++abi.dylib: terminating with uncaught exception of type NSException (lldb)
body: <p>I'm programming an app in swift and when I run the test app on the iPhone simulator everything works, but then I try to swipe right, which is a gesture that I added for it to go to the next Page(View Controller Two) it crashes and shows this error report in the console log.</p>
  
  <pre><code>2014-10-18 12:07:34.400 soundtest[17081:818922] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[&lt;soundtest.ViewControllerTwo 0x7f92f1f20090&gt; setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key sfdfa.'
  *** First throw call stack:
  (
      0   CoreFoundation                      0x00000001067813f5 __exceptionPreprocess + 165
      1   libobjc.A.dylib                     0x00000001082afbb7 objc_exception_throw + 45
      2   CoreFoundation                      0x0000000106781039 -[NSException raise] + 9
      3   Foundation                          0x0000000106b984d3 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 259
      4   CoreFoundation                      0x00000001066cb400 -[NSArray makeObjectsPerformSelector:] + 224
      5   UIKit                               0x00000001072ce97d -[UINib instantiateWithOwner:options:] + 1506
      6   UIKit                               0x000000010712f698 -[UIViewController _loadViewFromNibNamed:bundle:] + 242
      7   UIKit                               0x000000010712fc88 -[UIViewController loadView] + 109
      8   UIKit                               0x000000010712fef9 -[UIViewController loadViewIfRequired] + 75
      9   UIKit                               0x000000010713038e -[UIViewController view] + 27
      10  UIKit                               0x00000001076cd83f -[_UIFullscreenPresentationController _setPresentedViewController:] + 65
      11  UIKit                               0x000000010710bc49 -[UIPresentationController initWithPresentedViewController:presentingViewController:] + 105
      12  UIKit                               0x000000010713c121 -[UIViewController _presentViewController:withAnimationController:completion:] + 1746
      13  UIKit                               0x000000010713e461 __62-[UIViewController presentViewController:animated:completion:]_block_invoke + 132
      14  UIKit                               0x000000010713e385 -[UIViewController presentViewController:animated:completion:] + 229
      15  UIKit                               0x00000001073bb9d6 _UIGestureRecognizerSendActions + 262
      16  UIKit                               0x00000001073ba679 -[UIGestureRecognizer _updateGestureWithEvent:buttonEvent:] + 532
      17  UIKit                               0x00000001073bf296 ___UIGestureRecognizerUpdate_block_invoke662 + 51
      18  UIKit                               0x00000001073bf192 _UIGestureRecognizerRemoveObjectsFromArrayAndApplyBlocks + 254
      19  UIKit                               0x00000001073b520d _UIGestureRecognizerUpdate + 2796
      20  UIKit                               0x00000001070520a6 -[UIWindow _sendGesturesForEvent:] + 1041
      21  UIKit                               0x0000000107052cd3 -[UIWindow sendEvent:] + 667
      22  UIKit                               0x000000010701fae1 -[UIApplication sendEvent:] + 246
      23  UIKit                               0x000000010702cbad _UIApplicationHandleEventFromQueueEvent + 17370
      24  UIKit                               0x0000000107008233 _UIApplicationHandleEventQueue + 1961
      25  CoreFoundation                      0x00000001066b6ad1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
      26  CoreFoundation                      0x00000001066ac99d __CFRunLoopDoSources0 + 269
      27  CoreFoundation                      0x00000001066abfd4 __CFRunLoopRun + 868
      28  CoreFoundation                      0x00000001066aba06 CFRunLoopRunSpecific + 470
      29  GraphicsServices                    0x000000010a1699f0 GSEventRunModal + 161
      30  UIKit                               0x000000010700b550 UIApplicationMain + 1282
      31  soundtest                           0x000000010624503e top_level_code + 78
      32  soundtest                           0x000000010624507a main + 42
      33  libdyld.dylib                       0x000000010ae4a145 start + 1
      34  ???                                 0x0000000000000001 0x0 + 1
  )
  libc++abi.dylib: terminating with uncaught exception of type NSException
  (lldb) 
  </code></pre>