NSUnknownKeyException even though outlets are defined - ios

Question

I have a custom view with a corresponding xib in a framework. In interface builder, I've set the File's Owner and the view itself to the my subclass of UIView (TotalTokenCountView). I've also setup outlets for two labels in the custom view. However, when I use this custom view in an application, I get an NSUnknownKeyException exception.
I've tried setting the outlet vars to public to ensure that they can be connected outside of the framework, but that didn't work either.
Am I missing something here? Is there more setup I need to do for the outlets to connect?
public class TotalTokenCountView: UIView {
#IBOutlet public weak var tokenLabel: UILabel!
#IBOutlet public weak var tokenCountLabel: UILabel!
public override func awakeFromNib() {
tokenCountLabel.textColor = UIColor.deepPurple
tokenLabel.textColor = UIColor.lavenderGrayMedium
}
static func create() -> TotalTokenCountView {
return mybundle.loadNibNamed("TotalTokenCountView", owner: self, options: nil)!.first! as! TotalTokenCountView
}
}
The code that creates the custom view:
public class TotalTokenCountBarButtonItem: UIBarButtonItem {
public required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
commonInit()
}
private func commonInit() {
self.customView = TotalTokenCountView.create()
}
}
IB Screenshots:
Exception:
*** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<MyFrameworkTarget.TotalTokenCountView 0x104ed9580> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key tokenCountLabel.'
*** First throw call stack:
(
0 CoreFoundation 0x000000010a0d31e6 __exceptionPreprocess + 294
1 libobjc.A.dylib 0x000000010550a031 objc_exception_throw + 48
2 CoreFoundation 0x000000010a0d30b9 -[NSException raise] + 9
3 Foundation 0x0000000104f2bb47 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 292
4 UIKit 0x000000010622fe8a -[UIRuntimeOutletConnection connect] + 109
5 CoreFoundation 0x000000010a075e8d -[NSArray makeObjectsPerformSelector:] + 317
6 UIKit 0x000000010622e834 -[UINib instantiateWithOwner:options:] + 1856
7 MyFrameworkTarget 0x0000000104ed73bf _T012MyFrameworkTarget19TotalTokenCountViewC6createACyFZ + 431
8 MyFrameworkTarget 0x0000000104ed817b _T012MyFrameworkTarget28TotalTokenCountBarButtonItemC10commonInit33_82940FA39F221CEB8A8645FA6323AFBFLLyyF + 43
9 MyFrameworkTarget 0x0000000104ed80bc _T012MyFrameworkTarget28TotalTokenCountBarButtonItemCACSgSo7NSCoderC5coder_tcfc + 124
10 MyFrameworkTarget 0x0000000104ed813f _T012MyFrameworkTarget28TotalTokenCountBarButtonItemCACSgSo7NSCoderC5coder_tcfcTo + 47
11 UIKit 0x000000010622f725 -[UIClassSwapper initWithCoder:] + 246
12 UIKit 0x000000010648188c UINibDecoderDecodeObjectForValue + 704
13 UIKit 0x00000001064815bf -[UINibDecoder decodeObjectForKey:] + 246
14 UIKit 0x000000010671219b -[UINavigationItem initWithCoder:] + 715
15 UIKit 0x000000010648188c UINibDecoderDecodeObjectForValue + 704
16 UIKit 0x00000001064815bf -[UINibDecoder decodeObjectForKey:] + 246
17 UIKit 0x0000000105f44db1 -[UIViewController initWithCoder:] + 407
18 UIKit 0x0000000105fac885 -[UITabBarController initWithCoder:] + 65
19 UIKit 0x000000010648188c UINibDecoderDecodeObjectForValue + 704
20 UIKit 0x0000000106481a2a UINibDecoderDecodeObjectForValue + 1118
21 UIKit 0x00000001064815bf -[UINibDecoder decodeObjectForKey:] + 246
22 UIKit 0x0000000105f451a0 -[UIViewController initWithCoder:] + 1414
23 UIKit 0x0000000105f74dcc -[UINavigationController initWithCoder:] + 65
24 UIKit 0x000000010648188c UINibDecoderDecodeObjectForValue + 704
25 UIKit 0x00000001064815bf -[UINibDecoder decodeObjectForKey:] + 246
26 UIKit 0x000000010622f3f1 -[UIRuntimeConnection initWithCoder:] + 178
27 UIKit 0x000000010648188c UINibDecoderDecodeObjectForValue + 704
28 UIKit 0x0000000106481a2a UINibDecoderDecodeObjectForValue + 1118
29 UIKit 0x00000001064815bf -[UINibDecoder decodeObjectForKey:] + 246
30 UIKit 0x000000010622e5e2 -[UINib instantiateWithOwner:options:] + 1262
31 UIKit 0x00000001066bb406 -[UIStoryboard instantiateViewControllerWithIdentifier:] + 181
32 UIKit 0x0000000105da5862 -[UIApplication _loadMainStoryboardFileNamed:bundle:] + 112
33 UIKit 0x0000000105da5d33 -[UIApplication _loadMainInterfaceFile] + 272
34 UIKit 0x0000000105da44b9 -[UIApplication _runWithMainScene:transitionContext:completion:] + 1403
35 UIKit 0x0000000106166f7e __111-[__UICanvasLifecycleMonitor_Compatability _scheduleFirstCommitForScene:transition:firstActivation:completion:]_block_invoke + 866
36 UIKit 0x0000000106539a39 +[_UICanvas _enqueuePostSettingUpdateTransactionBlock:] + 153
37 UIKit 0x0000000106166bba -[__UICanvasLifecycleMonitor_Compatability _scheduleFirstCommitForScene:transition:firstActivation:completion:] + 236
38 UIKit 0x00000001061673db -[__UICanvasLifecycleMonitor_Compatability activateEventsOnly:withContext:completion:] + 675
39 UIKit 0x0000000106ad8614 __82-[_UIApplicationCanvas _transitionLifecycleStateWithTransitionContext:completion:]_block_invoke + 299
40 UIKit 0x0000000106ad84ae -[_UIApplicationCanvas _transitionLifecycleStateWithTransitionContext:completion:] + 433
41 UIKit 0x00000001067bc75d __125-[_UICanvasLifecycleSettingsDiffAction performActionsForCanvas:withUpdatedScene:settingsDiff:fromSettings:transitionContext:]_block_invoke + 221
42 UIKit 0x00000001069b74b7 _performActionsWithDelayForTransitionContext + 100
43 UIKit 0x00000001067bc627 -[_UICanvasLifecycleSettingsDiffAction performActionsForCanvas:withUpdatedScene:settingsDiff:fromSettings:transitionContext:] + 223
44 UIKit 0x00000001065390e0 -[_UICanvas scene:didUpdateWithDiff:transitionContext:completion:] + 392
45 UIKit 0x0000000105da2eac -[UIApplication workspace:didCreateScene:withTransitionContext:completion:] + 515
46 UIKit 0x0000000106375bcb -[UIApplicationSceneClientAgent scene:didInitializeWithEvent:completion:] + 361
47 FrontBoardServices 0x000000010d5752f3 -[FBSSceneImpl _didCreateWithTransitionContext:completion:] + 331
48 FrontBoardServices 0x000000010d57dcfa __56-[FBSWorkspace client:handleCreateScene:withCompletion:]_block_invoke_2 + 225
49 libdispatch.dylib 0x00000001089c97ec _dispatch_client_callout + 8
50 libdispatch.dylib 0x00000001089cedb8 _dispatch_block_invoke_direct + 592
51 FrontBoardServices 0x000000010d5a9470 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 24
52 FrontBoardServices 0x000000010d5a912e -[FBSSerialQueue _performNext] + 439
53 FrontBoardServices 0x000000010d5a968e -[FBSSerialQueue _performNextFromRunLoopSource] + 45
54 CoreFoundation 0x000000010a075bb1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
55 CoreFoundation 0x000000010a05a4af __CFRunLoopDoSources0 + 271
56 CoreFoundation 0x000000010a059a6f __CFRunLoopRun + 1263
57 CoreFoundation 0x000000010a05930b CFRunLoopRunSpecific + 635
58 GraphicsServices 0x000000010cdc9a73 GSEventRunModal + 62
59 UIKit 0x0000000105da6057 UIApplicationMain + 159
60 PinataApp 0x0000000104be62c7 main + 55
61 libdyld.dylib 0x0000000108a46955 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

Answer 1

Remove the references (outlets) from File's Owner and add them to TotalTokenCountView.

Answer 2

Not sure if this is causing your problem, but in your call to loadNibNamed, you're passing self as owner. Since you're in a static method, that's a reference to the class type, not an instance.