Swift: Terminating with uncaught exception of type NSException

Question

I'm developing a simple app and when I click to sign up the user, the app gets terminated. Please help me figure this out.

It says that:

Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[ setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key CreditCardTextField.'

Here's the error in more detail:

015-06-04 22:42:57.661 ParseStarterProject[43853:4461316] Unknown class RegisterPageViewController in Interface Builder file. 2015-06-04 22:42:57.712 ParseStarterProject[43853:4461316] * Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[ setValue:forUndefinedKey:]: this class is not key value coding-compliant 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 Foundation
0x0000000110b6b7b3 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 259 4 CoreFoundation 0x0000000110616e80 -[NSArray makeObjectsPerformSelector:] + 224 5 UIKit 0x000000011134bc7d -[UINib instantiateWithOwner:options:] + 1506 6
UIKit 0x00000001111aaf98 -[UIViewController _loadViewFromNibNamed:bundle:] + 242 7 UIKit 0x00000001111ab588 -[UIViewController loadView] + 109 8 UIKit
0x00000001111ab7f9 -[UIViewController loadViewIfRequired] + 75 9
UIKit 0x00000001111abc8e -[UIViewController view] + 27 10 UIKit 0x000000011174d41e -[_UIFullscreenPresentationController _setPresentedViewController:] + 65 11 UIKit 0x0000000111187429 -[UIPresentationController initWithPresentedViewController:presentingViewController:] + 105 12 UIKit 0x00000001111b7a41 -[UIViewController _presentViewController:withAnimationController:completion:] + 1746 13 UIKit 0x00000001111b9d81 __62-[UIViewController presentViewController:animated:completion:]_block_invoke + 132 14 UIKit 0x00000001111b9ca5 -[UIViewController presentViewController:animated:completion:] + 229 15 UIKit 0x00000001110878be -[UIApplication sendAction:to:from:forEvent:] + 75 16 UIKit 0x000000011118e410 -[UIControl _sendActionsForEvents:withEvent:] + 467 17 UIKit 0x000000011118d7df -[UIControl touchesEnded:withEvent:] + 522 18 UIKit 0x00000001110cd308 -[UIWindow _sendTouchesForEvent:] + 735 19 UIKit 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 ) libc++abi.dylib: terminating with uncaught exception of type NSException (lldb)

Answer 1

It seems that you have a bronken @IBOutlet for CreditCardTextField, check in your storyboard, as soon as you reconnect the outlet it all should work again

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

This is how you check your outlets:

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