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.

```
2014-10-18 12:07:34.400 soundtest[17081:818922] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<soundtest.ViewControllerTwo 0x7f92f1f20090> 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) 

```