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iOS Build a Simple iPhone App (iOS7) Getting Started What Is an IBOutlet?

Mohd Fadzli Mohd Fuzi
Mohd Fadzli Mohd Fuzi
1,087 Points

Codes not running according to tutorial

Hi I downloaded the project files but it didn't run according to the tutorial.Did I miss something?

4 Answers

Stone Preston
Stone Preston
42,016 Points

what happened when you ran it? did you get it an error? what was not correct about it?

Mohd Fadzli Mohd Fuzi
Mohd Fadzli Mohd Fuzi
1,087 Points

Hi, this is what was returned by XCode:

2014-06-27 10:53:16.079 CrystalBall[33450:60b] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<THViewController 0x8e5db90> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key predictionLabel.'
*** First throw call stack:
    0   CoreFoundation                      0x017eb1e4 __exceptionPreprocess + 180
    1   libobjc.A.dylib                     0x0156a8e5 objc_exception_throw + 44
    2   CoreFoundation                      0x0187afe1 -[NSException raise] + 17
    3   Foundation                          0x0122ad9e -[NSObject(NSKeyValueCoding) setValue:forUndefinedKey:] + 282
    4   Foundation                          0x011971d7 _NSSetUsingKeyValueSetter + 88
    5   Foundation                          0x01196731 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 267
    6   Foundation                          0x011f8b0a -[NSObject(NSKeyValueCoding) setValue:forKeyPath:] + 412
    7   UIKit                               0x004e11f4 -[UIRuntimeOutletConnection connect] + 106
    8   libobjc.A.dylib                     0x0157c7de -[NSObject performSelector:] + 62
    9   CoreFoundation                      0x017e676a -[NSArray makeObjectsPerformSelector:] + 314
    10  UIKit                               0x004dfd4d -[UINib instantiateWithOwner:options:] + 1417
    11  UIKit                               0x003486f5 -[UIViewController _loadViewFromNibNamed:bundle:] + 280
    12  UIKit                               0x00348e9d -[UIViewController loadView] + 302
    13  UIKit                               0x003490d3 -[UIViewController loadViewIfRequired] + 78
    14  UIKit                               0x003495d9 -[UIViewController view] + 35
    15  UIKit                               0x00269267 -[UIWindow addRootViewControllerViewIfPossible] + 66
    16  UIKit                               0x002695ef -[UIWindow _setHidden:forced:] + 312
    17  UIKit                               0x0026986b -[UIWindow _orderFrontWithoutMakingKey] + 49
    18  UIKit                               0x002743c8 -[UIWindow makeKeyAndVisible] + 65
    19  UIKit                               0x00224bc0 -[UIApplication _callInitializationDelegatesForURL:payload:suspended:] + 2097
    20  UIKit                               0x00229667 -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 824
    21  UIKit                               0x0023df92 -[UIApplication handleEvent:withNewEvent:] + 3517
    22  UIKit                               0x0023e555 -[UIApplication sendEvent:] + 85
    23  UIKit                               0x0022b250 _UIApplicationHandleEvent + 683
    24  GraphicsServices                    0x037e0f02 _PurpleEventCallback + 776
    25  GraphicsServices                    0x037e0a0d PurpleEventCallback + 46
    26  CoreFoundation                      0x01766ca5 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 53
    27  CoreFoundation                      0x017669db __CFRunLoopDoSource1 + 523
    28  CoreFoundation                      0x0179168c __CFRunLoopRun + 2156
    29  CoreFoundation                      0x017909d3 CFRunLoopRunSpecific + 467
    30  CoreFoundation                      0x017907eb CFRunLoopRunInMode + 123
    31  UIKit                               0x00228d9c -[UIApplication _run] + 840
    32  UIKit                               0x0022af9b UIApplicationMain + 1225
    33  CrystalBall                         0x0000212d main + 141
    34  libdyld.dylib                       0x01e32701 start + 1
libc++abi.dylib: terminating with uncaught exception of type NSException
Stone Preston
Stone Preston
42,016 Points

Ok what most likely happened was your renamed an outlet after connecting it. . To fix it just delete the outlet connection and reconnect it:

click on your view controller in storyboard. Then open the connections inspector. Delete anything related to your predictionLabelThen open your header file for that controller and remove the label declaration there. Control click and drag from your label in your storyboard to your header and name the outlet predictionLabel

Mohd Fadzli Mohd Fuzi
Mohd Fadzli Mohd Fuzi
1,087 Points

Sorry for the late reply. I have done what you told but the problem still occur.I tried to redo the example several times but the problem still occur.

Stone Preston
Stone Preston
42,016 Points

are you sure you did it correctly. open your connections inspector, can you post a screen shot of what you see there