Swift EXC_BAD_INSTRUCTION

Question

I try to code a game (i use this tutorial https://www.youtube.com/watch?v=LkYpoRj-7hA im new in Swift). Thats my Code so far:

import UIKit    
class ViewController: UIViewController {

    //Image View
    @IBOutlet var ticTac_A01: UIImageView = nil
    @IBOutlet var ticTac_A02: UIImageView = nil
    @IBOutlet var ticTac_A03: UIImageView = nil        
    @IBOutlet var ticTac_B01: UIImageView = nil
    @IBOutlet var ticTac_B02: UIImageView = nil
    @IBOutlet var ticTac_B03: UIImageView = nil        
    @IBOutlet var ticTac_C01: UIImageView = nil
    @IBOutlet var ticTac_C02: UIImageView = nil
    @IBOutlet var ticTac_C03: UIImageView = nil

    //Buttons
    @IBOutlet var ticTacBtn_A01: UIButton = nil
    @IBOutlet var ticTacBtn_A02: UIButton = nil
    @IBOutlet var ticTacBtn_A03: UIButton = nil    
    @IBOutlet var ticTacBtn_B01: UIButton = nil
    @IBOutlet var ticTacBtn_B02: UIButton = nil
    @IBOutlet var ticTacBtn_B03: UIButton = nil        
    @IBOutlet var ticTacBtn_C01: UIButton = nil
    @IBOutlet var ticTacBtn_C02: UIButton = nil
    @IBOutlet var ticTacBtn_C03: UIButton = nil        

    @IBOutlet  var resetBtn: UIButton = nil
    @IBOutlet  var userMessage: UILabel = nil

    var plays = Dictionary<Int, Int>()
    var done = false;
    var aiDeciding = false;

    @IBAction func UIButtonClicked(sender : UIButton){
        userMessage.hidden = true;

        if !plays[sender.tag]   && !aiDeciding && !done {
            setImageForSpot(sender.tag, player:1)
        }            
        checkForWin()
        aiTurn()
    }

    func setImageForSpot(spot:Int, player:Int){
        var playerMark = player == 1 ?  "x" : "o"
        plays[spot] = player

        switch spot {

        case 1:
            ticTac_A01.image = UIImage(named: playerMark)

        case 2:
            ticTac_A02.image = UIImage(named: playerMark)

        case 3:
            ticTac_A03.image = UIImage(named: playerMark)

        case 4:
            ticTac_B01.image = UIImage(named: playerMark)

        case 5:
            ticTac_B02.image = UIImage(named: playerMark)

        case 6:
            ticTac_B03.image = UIImage(named: playerMark)

        case 7:
            ticTac_C01.image = UIImage(named: playerMark)

        case 8:
            ticTac_C02.image = UIImage(named: playerMark)

        case 9:
            ticTac_C03.image = UIImage(named: playerMark)

        default:ticTac_B02.image = UIImage(named: playerMark)
        }            
    }

    func checkForWin(){}
    func aiTurn(){}        

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}

First i i get the „Thread 1: signal SIGABRT“ with this Output:

2014-07-21 10:26:21.709 Swift-Tac-Toe[3264:107207] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<_TtC13Swift_Tac_Toe14ViewController 0x7f8160ca0f00> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key ticTac01.'
*** First throw call stack:
(
    0   CoreFoundation                      0x00000001010a3055 __exceptionPreprocess + 165
    1   libobjc.A.dylib                     0x0000000102b5da1c objc_exception_throw + 45
    2   CoreFoundation                      0x00000001010a2c99 -[NSException raise] + 9
    3   Foundation                          0x00000001014b67a3 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 259
    4   CoreFoundation                      0x0000000100fed950 -[NSArray makeObjectsPerformSelector:] + 224
    5   UIKit                               0x0000000101bdb58d -[UINib instantiateWithOwner:options:] + 1506
    6   UIKit                               0x0000000101a42898 -[UIViewController _loadViewFromNibNamed:bundle:] + 242
    7   UIKit                               0x0000000101a42f49 -[UIViewController loadView] + 109
    8   UIKit                               0x0000000101a431ba -[UIViewController loadViewIfRequired] + 75
    9   UIKit                               0x0000000101a4364f -[UIViewController view] + 27
    10  UIKit                               0x0000000101964d79 -[UIWindow addRootViewControllerViewIfPossible] + 58
    11  UIKit                               0x0000000101965112 -[UIWindow _setHidden:forced:] + 276
    12  UIKit                               0x0000000101971e70 -[UIWindow makeKeyAndVisible] + 42
    13  UIKit                               0x000000010191cc31 -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 2673
    14  UIKit                               0x000000010191f5cc -[UIApplication _runWithMainScene:transitionContext:completion:] + 1222
    15  UIKit                               0x000000010191e5ac -[UIApplication workspaceDidEndTransaction:] + 19
    16  FrontBoardServices                  0x0000000104357263 __31-[FBSSerialQueue performAsync:]_block_invoke + 16
    17  CoreFoundation                      0x0000000100fd909c __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 12
    18  CoreFoundation                      0x0000000100fce805 __CFRunLoopDoBlocks + 341
    19  CoreFoundation                      0x0000000100fce5c5 __CFRunLoopRun + 2389
    20  CoreFoundation                      0x0000000100fcda06 CFRunLoopRunSpecific + 470
    21  UIKit                               0x000000010191dfc2 -[UIApplication _run] + 413
    22  UIKit                               0x0000000101920cf8 UIApplicationMain + 1282
    23  Swift-Tac-Toe                       0x0000000100c224fd top_level_code + 77
    24  Swift-Tac-Toe                       0x0000000100c2253a main + 42
    25  libdyld.dylib                       0x00000001030ce145 start + 1
    26  ???                                 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)

After Debug > Continue i get Thread 1: EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0).

and thats it.

Anyone can help me here?

Answer 1

Read the crash log output; it says:

Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<_TtC13Swift_Tac_Toe14ViewController 0x7f8160ca0f00> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key ticTac01.'

So the problem is that you have configured something (possibly an object in a XIB or Storyboard) to access ticTac01, which doesn't appear to be defined in your class. My guess is that that might have been an earlier name for one of the variables you do have?