Rock, Paper, Scissors help

#1

Hey swift forums, I’m having trouble launching a completed Rock Paper Scissors game. This is lesson 20 from the introduction to app development with swift iBook. I receive a SIGABRT ERROR, building the app succeeds but then I receive a white screen. Any help at all would be greatly appreciated. Thank you.

DEBUG AREA:

2019-06-23 20:11:20.811780-0400 Rock Paper Scissors[5220:106660] [general] CFLocaleCopyCurrent() failed to look up current locale via 'AppleLocale' and 'AppleLanguages' in user preferences; falling back to locale identifier 'en_US' as the default. Consider checking Console for sandbox violations from this process for reading from preferences, or enabling CoreFoundation debug logging for more information. This will only be logged once.
2019-06-23 20:11:20.984376-0400 Rock Paper Scissors[5220:106523] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<Rock_Paper_Scissors.ViewController 0x7fd609f048a0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key bump.'
*** First throw call stack:
(
	0   CoreFoundation                      0x00000001094f8b6e __exceptionPreprocess + 350
	1   libobjc.A.dylib                     0x0000000107d3ff57 objc_exception_throw + 48
	2   CoreFoundation                      0x00000001094f8739 -[NSException raise] + 9
	3   Foundation                          0x000000010779afc0 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 325
	4   UIKitCore                           0x0000000115a241f5 -[UIViewController setValue:forKey:] + 87
	5   UIKitCore                           0x0000000115d02e12 -[UIRuntimeOutletConnection connect] + 109
	6   CoreFoundation                      0x00000001094e5022 -[NSArray makeObjectsPerformSelector:] + 242
	7   UIKitCore                           0x0000000115cfffba -[UINib instantiateWithOwner:options:] + 2190
	8   UIKitCore                           0x0000000115a2b219 -[UIViewController _loadViewFromNibNamed:bundle:] + 395
	9   UIKitCore                           0x0000000115a2bd25 -[UIViewController loadView] + 177
	10  UIKitCore                           0x0000000115a2c024 -[UIViewController loadViewIfRequired] + 172
	11  UIKitCore                           0x0000000115a2c7d1 -[UIViewController view] + 27
	12  UIKitCore                           0x00000001160be844 -[UIWindow addRootViewControllerViewIfPossible] + 150
	13  UIKitCore                           0x00000001160bef93 -[UIWindow _setHidden:forced:] + 325
	14  UIKitCore                           0x00000001160d1882 -[UIWindow _mainQueue_makeKeyAndVisible] + 42
	15  UIKitCore                           0x00000001160802e8 -[UIApplication _callInitializationDelegatesWithActions:forCanvas:payload:fromOriginatingProcess:] + 4199
	16  UIKitCore                           0x00000001160858ae -[UIApplication _runWithMainScene:transitionContext:completion:] + 1286
	17  UIKitCore                           0x00000001157f2e8c -[_UISceneLifecycleMultiplexer completeApplicationLaunchWithFBSScene:transitionContext:] + 122
	18  UIKitCore                           0x0000000115cbf8a0 _UIScenePerformActionsWithLifecycleActionMask + 78
	19  UIKitCore                           0x00000001157f3993 __101-[_UISceneLifecycleMultiplexer _evalTransitionToSettings:fromSettings:forceExit:withTransitionStore:]_block_invoke + 198
	20  UIKitCore                           0x00000001157f345f -[_UISceneLifecycleMultiplexer _performBlock:withApplicationOfDeactivationReasons:fromReasons:] + 474
	21  UIKitCore                           0x00000001157f37c3 -[_UISceneLifecycleMultiplexer _evalTransitionToSettings:fromSettings:forceExit:withTransitionStore:] + 810
	22  UIKitCore                           0x00000001157f3060 -[_UISceneLifecycleMultiplexer uiScene:transitionedFromState:withTransitionContext:] + 345
	23  UIKitCore                           0x00000001157f73ca __186-[_UIWindowSceneFBSSceneTransitionContextDrivenLifecycleSettingsDiffAction _performActionsForUIScene:withUpdatedFBSScene:settingsDiff:fromSettings:transitionContext:lifecycleActionType:]_block_invoke_2 + 159
	24  UIKitCore                           0x0000000115bea08e +[BSAnimationSettings(UIKit) tryAnimatingWithSettings:actions:completion:] + 845
	25  UIKitCore                           0x0000000115cdd65c _UISceneSettingsDiffActionPerformChangesWithTransitionContext + 240
	26  UIKitCore                           0x00000001157f7009 __186-[_UIWindowSceneFBSSceneTransitionContextDrivenLifecycleSettingsDiffAction _performActionsForUIScene:withUpdatedFBSScene:settingsDiff:fromSettings:transitionContext:lifecycleActionType:]_block_invoke + 171
	27  UIKitCore                           0x0000000115cdd55f _UISceneSettingsDiffActionPerformActionsWithDelayForTransitionContext + 84
	28  UIKitCore                           0x00000001157f6e68 -[_UIWindowSceneFBSSceneTransitionContextDrivenLifecycleSettingsDiffAction _performActionsForUIScene:withUpdatedFBSScene:settingsDiff:fromSettings:transitionContext:lifecycleActionType:] + 359
	29  UIKitCore                           0x00000001156659b7 __64-[UIScene scene:didUpdateWithDiff:transitionContext:completion:]_block_invoke + 657
	30  UIKitCore                           0x0000000115664930 -[UIScene _emitSceneSettingsUpdateResponseForCompletion:afterSceneUpdateWork:] + 374
	31  UIKitCore                           0x00000001156656e1 -[UIScene scene:didUpdateWithDiff:transitionContext:completion:] + 210
	32  UIKitCore                           0x0000000116084126 -[UIApplication workspace:didCreateScene:withTransitionContext:completion:] + 535
	33  UIKitCore                           0x0000000115c0a77d -[UIApplicationSceneClientAgent scene:didInitializeWithEvent:completion:] + 361
	34  FrontBoardServices                  0x0000000111611b69 -[FBSSceneImpl _callOutQueue_agent_didCreateWithTransitionContext:completion:] + 442
	35  FrontBoardServices                  0x000000011163a168 __86-[FBSWorkspaceScenesClient sceneID:createWithParameters:transitionContext:completion:]_block_invoke.160 + 102
	36  FrontBoardServices                  0x000000011161ca99 -[FBSWorkspace _calloutQueue_executeCalloutFromSource:withBlock:] + 220
	37  FrontBoardServices                  0x0000000111639df9 __86-[FBSWorkspaceScenesClient sceneID:createWithParameters:transitionContext:completion:]_block_invoke + 355
	38  libdispatch.dylib                   0x000000010a300ed0 _dispatch_client_callout + 8
	39  libdispatch.dylib                   0x000000010a303e41 _dispatch_block_invoke_direct + 300
	40  FrontBoardServices                  0x000000011166122b __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 30
	41  FrontBoardServices                  0x0000000111660f12 -[FBSSerialQueue _performNext] + 436
	42  FrontBoardServices                  0x0000000111661433 -[FBSSerialQueue _performNextFromRunLoopSource] + 33
	43  CoreFoundation                      0x000000010945c371 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
	44  CoreFoundation                      0x000000010945c301 __CFRunLoopDoSource0 + 81
	45  CoreFoundation                      0x000000010945bad4 __CFRunLoopDoSources0 + 180
	46  CoreFoundation                      0x00000001094567ef __CFRunLoopRun + 1263
	47  CoreFoundation                      0x0000000109455fd6 CFRunLoopRunSpecific + 438
	48  GraphicsServices                    0x0000000110e659f8 GSEventRunModal + 65
	49  UIKitCore                           0x0000000116087722 UIApplicationMain + 1621
	50  Rock Paper Scissors                 0x0000000107413a7b main + 75
	51  libdyld.dylib                       0x000000010a3896ad start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
#2

You're missing an @IBOutlet connection to a variable named bump. That's usually the cause of UIViewController classes crashed with the exception about not being "key value coding-compliant".

1 Like
#7

I fixed all of the connections and am still receiving an error, help is greatly appreciated.

DEBUG AREA:

2019-06-23 22:33:13.595787-0400 Rock Paper Scissors[7360:166148] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<Rock_Paper_Scissors.ViewController 0x7fc006609790> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key buttons.'

#8

I’d be much nicer if you put the debugging statements inside triple tick marks, like this

```
Put code here
```

Also you can make use of the edit button, so you don't nee to delete comment every time you want to change something.

#9

Thank you, this is good to know.

import UIKit

class ViewController: UIViewController {
    
    @IBOutlet weak var sign: UILabel!
    @IBOutlet weak var status: UILabel!
    @IBOutlet weak var scissors: UIButton!
    @IBOutlet weak var rock: UIButton!
    @IBOutlet weak var paper: UIButton!
    @IBOutlet weak var playAgain: UIButton!
    
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        resetView()
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }

    
    func resetView() {
        sign.text = "🤖"
        status.text = "Rock, Paper, Scissors?"
        rock.isHidden = false
        rock.isEnabled = true
        paper.isHidden = false
        paper.isEnabled = true
        scissors.isHidden = false
        scissors.isEnabled = true
        playAgain.isHidden = true
    
    }
    
    func play(_ playerTurn: Sign) {
        rock.isEnabled = false
        paper.isEnabled = false
        scissors.isEnabled = false
       
    let opponent = randomSign()
        sign.text = opponent.emoji
   
        
        let gameState = playerTurn.turns(opponent)
        
        switch gameState {
        case .draw:
            status.text = "It's a tie!"
        case .lose:
            status.text = "Sorry, you lost..."
        case .win:
            status.text = "Congratulations, you won!"
        case .start:
            status.text = "Rock, Paper, Scissors?"
        }
    
        switch playerTurn {
        case .rock:
            rock.isHidden = false
            paper.isHidden = true
            scissors.isHidden = true
        case .paper:
            rock.isHidden = true
            paper.isHidden = false
            scissors.isHidden = true
        case .scissors:
            rock.isHidden = true
            paper.isHidden = true
            scissors.isHidden = false
        }
    playAgain.isHidden = false
        
    
    }
    
    @IBAction func scissorsSelect(_ sender: Any) {
    play(Sign.scissors)
    }
    
    @IBAction func rockSelect(_ sender: Any) {
    play(Sign.rock)
    }
    
    
    @IBAction func paperSelect(_ sender: Any) {
    play(Sign.paper)
    }
    
    @IBAction func playAgainSelect(_ sender: Any) {
    resetView()
    }
    
}
#10

It's still much of the same error. The story board tries to set a value for variable named button in your ViewController, but it couldn't.

  • If your ViewController indeed has variable buttons, you might want to check that it's proper @IBObject.
  • If your ViewController doesn't have buttons, then storyboard incorrectly think that it does. You might want to go in and fix it in storyboard.
#11

Thanks this sort of helped, regardless problem solved. Thanks

1 Like
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