Swift: termination with an uncaught exception of type NSException

Question

I am developing a simple application, and when I click to register a user, the application terminates. Please help me figure this out.

It states that:

Application termination due to the uncaught exception "NSUnknownKeyException", reason: '[setValue: forUndefinedKey:]: this class is not a key value compatible with the encoding for the CreditCardTextField key. ''

Here's the error in more detail:

015-06-04 22: 42: 57.661 ParseStarterProject [43853: 4461316] The RegisterPageViewController class in the Interface Builder file is unknown. 2015-06-04 22: 42: 57.712 ParseStarterProject [43853: 4461316] * Application termination due to the unselected exception "NSUnknownKeyException", reason: '[setValue: forUndefinedKey:]: this class is not a key value compatible with the code for the key CreditCardTextField. * First throw call stack: (0 CoreFoundation 0x00000001106ccf35 exceptionPreprocess + 165 1 libobjc.A.dylib
0x000000011233ebb7 objc_exception_throw + 45 2 CoreFoundation
0x00000001106ccb79 - [NSException raise] + 9 3 Fund
0x0000000110b6b7b3 - [NSObject (NSKeyValueCoding) setValue: forKey:] + 259 4 CoreFoundation 0x0000000110616e80 - [NSArray makeObjectsPerformSelector:] + 224 5 UIKit 0x000000011134bc7d - [OINib] + 6Oinner
UIKit 0x00000001111aaf98 - [UIViewController _loadViewFromNibNamed: bundle:] + 242 7 UIKit 0x00000001111ab588 - [UIViewController loadView] + 109 8 UIKit
0x00000001111ab7f9 - [UIViewController loadViewIfRequired] + 75 9
UIKit 0x00000001111abc8e - [UIViewController view] + 27 October UIKit 0x000000011174d41e - [_ UIFullscreenPresentationController _setPresentedViewController: ] + 65 11 UIKit 0x0000000111187429 - [UIPresentationController initWithPresentedViewController: presentingViewController :] + 105 12 UIKit 0x00000001111b7a41 - [UIViewController _presentViewController: withAnimationController : End:] + 1746 13 UIKit 0x00000001111b9d81 __62- [UIViewController presentViewController: animated: completion:] _ block_invoke + 132 14 UIKit 0x000000010111b9ca5 - [UIViewController presentViewController: animated: completion:] + 229 15 UIKit 0x00000001110878781be8be781pp8: Bebe UIKit 0x000000011118e410 - [UIControl _sendActionsForEvents: withEvent:] + 467 17 UIKit 0x000000011118d7df - [UIControl touchesEnded: withEvent:] + 522 18 UIKit 0x00000001110cd308 - [UIWindow _sendTouches_sendws_35 0x00000001110cdc33 - [UIWindow sendEvent:] + 683 20 UIKit
0x000000011109a9b1 - [UIApplication sendEvent:] + 246 21 UIKit
0x00000001110a7a7d _UIApplicationHandleEventFromQueueEvent + 17370 22 UIKit 0x0000000111083103 _UIApplicationHandleEventQueue + 1961 23 CoreFoundation 0x0000000110602551 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 17 24 CoreFoundation 0x00000001105f841d __CFRunLoopDoSources0 + 269 25 CoreFoundation 0x00000001105f7a54 __CFRunLoopRun + 868 26 CoreFoundation
0x00000001105f7486 CFRunLoopRunSpecific + 470 27 GraphicsServices
0x0000000113de79f0 GSEventRunModal + 161 28 UIKit
0x0000000111086420 UIApplicationMain + 1282 29 ParseStarterProject
0x000000010fbbe9de top_level_code + 78 30 ParseStarterProject
0x000000010fbbeaba main + 42 31 libdyld.dylib
0x0000000112b54145 start + 1 32 ??? 0x0000000000000001 0x0 + 1) lib ++ abi.dylib: termination with an exception of type NSException (lldb)

Answer 1

It seems that you have the @IBOutlet armor for CreditCardTextField , check your storyboard as soon as you plug in the socket again, all this should work again.

 setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key CreditCardTextField.' 

Here's how you check your exits:

Select the field, the outputs on the right should be connected correctly, and the circles in the code should have a dot inside, if the connection is not broken, drag it to fix it.