App crashes when table menu item selected in swift - swift

The app crashes in simulator when one item is pressed on the slide out menu (created with table view), I've tried deleting connections between UI and IB and remaking them incase this is the issue, but it hasn't solved it.
This is the error code that comes out:
View Controller is : <AKSwiftSlideMenu.HomeVC: 0x7fa6c5e05b90>
Calculate your own repayment
2017-02-08 17:36:13.782 AKSwiftSlideMenu[37086:3161182] Unknown class TrackerVC in Interface Builder file.
2017-02-08 17:36:13.801 AKSwiftSlideMenu[37086:3161182] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIViewController 0x7fa6c5d1f920> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key AnnualInterestInput.'
*** First throw call stack:
(
0 CoreFoundation 0x000000010a9a0d4b __exceptionPreprocess + 171
1 libobjc.A.dylib 0x000000010a40221e objc_exception_throw + 48
2 CoreFoundation 0x000000010a9a0c99 -[NSException raise] + 9
3 Foundation 0x0000000109f109df -[NSObject(NSKeyValueCoding) setValue:forKey:] + 291
4 UIKit 0x000000010af5f293 -[UIViewController setValue:forKey:] + 88
5 UIKit 0x000000010b1d379e -[UIRuntimeOutletConnection connect] + 109
6 CoreFoundation 0x000000010a9459e0 -[NSArray makeObjectsPerformSelector:] + 256
7 UIKit 0x000000010b1d2122 -[UINib instantiateWithOwner:options:] + 1867
8 UIKit 0x000000010af659c5 -[UIViewController _loadViewFromNibNamed:bundle:] + 386
9 UIKit 0x000000010af662e7 -[UIViewController loadView] + 177
10 UIKit 0x000000010af6661c -[UIViewController loadViewIfRequired] + 201
11 UIKit 0x000000010af6d062 -[UIViewController __viewWillAppear:] + 118
12 UIKit 0x000000010af981d3 -[UINavigationController _startCustomTransition:] + 1290
13 UIKit 0x000000010afa8e48 -[UINavigationController _startDeferredTransitionIfNeeded:] + 697
14 UIKit 0x000000010afa9fdb -[UINavigationController __viewWillLayoutSubviews] + 58
15 UIKit 0x000000010b1a0dd7 -[UILayoutContainerView layoutSubviews] + 223
16 UIKit 0x000000010ae89ab8 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 1237
17 QuartzCore 0x000000010f85fbf8 -[CALayer layoutSublayers] + 146
18 QuartzCore 0x000000010f853440 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 366
19 QuartzCore 0x000000010f8532be _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 24
20 QuartzCore 0x000000010f7e1318 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 280
21 QuartzCore 0x000000010f80e3ff _ZN2CA11Transaction6commitEv + 475
22 UIKit 0x000000010adef7f0 _afterCACommitHandler + 346
23 CoreFoundation 0x000000010a945267 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23
24 CoreFoundation 0x000000010a9451d7 __CFRunLoopDoObservers + 391
25 CoreFoundation 0x000000010a929f8e __CFRunLoopRun + 1198
26 CoreFoundation 0x000000010a929884 CFRunLoopRunSpecific + 420
27 GraphicsServices 0x000000010f02fa6f GSEventRunModal + 161
28 UIKit 0x000000010adc4c68 UIApplicationMain + 159
29 AKSwiftSlideMenu 0x0000000109e0401f main + 111
30 libdyld.dylib 0x000000010e09f68d start + 1
31 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

According to the error, it most probably is that one of your views is connected to an outlet named AnnualInterestInput that was deleted from the class.
If by deleting all the outlets and reconnecting them to the view controller didn't work it out, then it may be due to a wrong class in the xib.
This means that you have set a wrong class in the xib or storyboard and it's not able to found the key. If the class is still correct, check if the module is correct!
This line is what gives me a hint that this could be the problem:
2017-02-08 17:36:13.782 AKSwiftSlideMenu[37086:3161182] Unknown class TrackerVC in Interface Builder file.

Related

can't delete This class is not key value coding-compliant for the key ptbLabel.'

I have error like this.
This class is not key value coding-compliant for the key ptbLabel.
I know this error happens when there is something wrong with a linkage between storyboard and source code.
So, I deleted the linkage from storyboard.
then this error disappear.
However I reconnect again from Storyboard manually.
#IBOutlet weak var ptbLabel: UIImageView!
It shows the same error.
Why does this happen??
I guess it might be something related with project name change.
I have changed project name just a few steps before, by clicking the projectname at the top of left pain.
These are the error log below
] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIViewController 0x7ff6e0404580> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key ptbLabel.'
*** First throw call stack:
(
0 CoreFoundation 0x0000000110901b0b __exceptionPreprocess + 171
1 libobjc.A.dylib 0x00000001102c5141 objc_exception_throw + 48
2 CoreFoundation 0x0000000110901a59 -[NSException raise] + 9
3 Foundation 0x000000010f6f1e8b -[NSObject(NSKeyValueCoding) setValue:forKey:] + 292
4 UIKit 0x000000010dfe0644 -[UIViewController setValue:forKey:] + 87
5 UIKit 0x000000010e24d6b9 -[UIRuntimeOutletConnection connect] + 109
6 CoreFoundation 0x00000001108a7e8d -[NSArray makeObjectsPerformSelector:] + 269
7 UIKit 0x000000010e24c06f -[UINib instantiateWithOwner:options:] + 1856
8 UIKit 0x000000010dfe6c73 -[UIViewController _loadViewFromNibNamed:bundle:] + 381
9 UIKit 0x000000010dfe7589 -[UIViewController loadView] + 177
10 UIKit 0x000000010dfe78ba -[UIViewController loadViewIfRequired] + 195
11 UIKit 0x000000010dfe810a -[UIViewController view] + 27
12 UIKit 0x000000010deb063a -[UIWindow addRootViewControllerViewIfPossible] + 65
13 UIKit 0x000000010deb0d20 -[UIWindow _setHidden:forced:] + 294
14 UIKit 0x000000010dec3b6e -[UIWindow makeKeyAndVisible] + 42
15 UIKit 0x000000010de3d31f -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 4346
16 UIKit 0x000000010de43584 -[UIApplication _runWithMainScene:transitionContext:completion:] + 1709
17 UIKit 0x000000010de40793 -[UIApplication workspaceDidEndTransaction:] + 182
18 FrontBoardServices 0x00000001149875f6 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 24
19 FrontBoardServices 0x000000011498746d -[FBSSerialQueue _performNext] + 186
20 FrontBoardServices 0x00000001149877f6 -[FBSSerialQueue _performNextFromRunLoopSource] + 45
21 CoreFoundation 0x00000001108a7c01 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
22 CoreFoundation 0x000000011088d0cf __CFRunLoopDoSources0 + 527
23 CoreFoundation 0x000000011088c5ff __CFRunLoopRun + 911
24 CoreFoundation 0x000000011088c016 CFRunLoopRunSpecific + 406
25 UIKit 0x000000010de3f02f -[UIApplication _run] + 468
26 UIKit 0x000000010de450d4 UIApplicationMain + 159
27 BeatBrain 0x000000010be5dcb0 main + 48
28 libdyld.dylib 0x000000011198d65d start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
-------- solution -------
I opened the storyboard as source code.
then found customModule is not changed when I changed the projectname.
<viewController id="2" customClass="viewController" customModule="OldProjectName" sceneMemberID="viewController">
I changed here OldProjectName -> NewProjectName
it works.
thanks very much.

SIGABRT Error swift

Could anyone help me understand why Im getting this error? It seems to be happening when I load one of my view controllers but I can't see why.
What usually causes an error like this?
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UITextInputTraits length]: unrecognized selector sent to instance 0x7fbf924828a0'
*** First throw call stack:
(
0 CoreFoundation 0x000000010664ac65 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x0000000105f27bb7 objc_exception_throw + 45
2 CoreFoundation 0x00000001066520ad -[NSObject(NSObject) doesNotRecognizeSelector:] + 205
3 CoreFoundation 0x00000001065a813c ___forwarding___ + 988
4 CoreFoundation 0x00000001065a7cd8 _CF_forwarding_prep_0 + 120
5 libswiftCore.dylib 0x0000000107ddf728 _TTSf4g_d___TFSSCfMSSFT12_cocoaStringPSs9AnyObject__SS + 120
6 libswiftCore.dylib 0x0000000107dc01a3 _TFSSCfMSSFT12_cocoaStringPSs9AnyObject__SS + 19
7 Project1 0x00000001054ec3bd _TToFC8ASA_Rank22SettingsViewControllers9ASANumberSS + 61
8 Foundation 0x0000000105abdb53 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 259
9 CoreFoundation 0x0000000106592d50 -[NSArray makeObjectsPerformSelector:] + 224
10 UIKit 0x0000000106d1b4eb -[UINib instantiateWithOwner:options:] + 1506
11 UIKit 0x0000000106b736d8 -[UIViewController _loadViewFromNibNamed:bundle:] + 242
12 UIKit 0x0000000106b73cc8 -[UIViewController loadView] + 109
13 UIKit 0x0000000106b73f39 -[UIViewController loadViewIfRequired] + 75
14 UIKit 0x0000000106b743ce -[UIViewController view] + 27
15 UIKit 0x000000010710132d -[_UIFullscreenPresentationController _setPresentedViewController:] + 65
16 UIKit 0x0000000106b4ed69 -[UIPresentationController initWithPresentedViewController:presentingViewController:] + 105
17 UIKit 0x0000000106b80248 -[UIViewController _presentViewController:withAnimationController:completion:] + 1761
18 UIKit 0x0000000106b826c1 __62-[UIViewController presentViewController:animated:completion:]_block_invoke + 132
19 UIKit 0x0000000106b825e5 -[UIViewController presentViewController:animated:completion:] + 229
20 UIKit 0x0000000106a44d62 -[UIApplication sendAction:to:from:forEvent:] + 75
21 UIKit 0x0000000106b5650a -[UIControl _sendActionsForEvents:withEvent:] + 467
22 UIKit 0x0000000106b558d9 -[UIControl touchesEnded:withEvent:] + 522
23 UIKit 0x0000000106a91958 -[UIWindow _sendTouchesForEvent:] + 735
24 UIKit 0x0000000106a92282 -[UIWindow sendEvent:] + 682
25 UIKit 0x0000000106a58541 -[UIApplication sendEvent:] + 246
26 UIKit 0x0000000106a65cdc _UIApplicationHandleEventFromQueueEvent + 18265
27 UIKit 0x0000000106a4059c _UIApplicationHandleEventQueue + 2066
28 CoreFoundation 0x000000010657e431 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
29 CoreFoundation 0x00000001065742fd __CFRunLoopDoSources0 + 269
30 CoreFoundation 0x0000000106573934 __CFRunLoopRun + 868
31 CoreFoundation 0x0000000106573366 CFRunLoopRunSpecific + 470
32 GraphicsServices 0x000000010a1e0a3e GSEventRunModal + 161
33 UIKit 0x0000000106a438c0 UIApplicationMain + 1282
34 Project1 0x00000001054f70c7 main + 135
35 libdyld.dylib 0x0000000108530145 start + 1
36 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
Please ask for any other informations that is helpful
Thanks
You most likely have an Outlet assigned to an element on the view controller you are transitioning to that is no longer connected to your code. This youtube video explains it in more detail.
To hunt down this issue, try right-clicking on all your elements (UILabels, UIViews, UIButton...) with the assistant editor open and cross check to see if the outlet name is referenced in the view controller.

Using the Tab bar results in an iPhone crash

I seem to be having an issue with loading a game on a tab in a tab bar application. When I run the app and click on the tab that the game is supposed to go on, it crashes giving me this in console:
2011-03-20 08:36:29.311 ComputerClan[21592:207] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIViewController 0x6948f30> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key racquet_green.'
*** Call stack at first throw:
(
0 CoreFoundation 0x017ea5a9 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x0193e313 objc_exception_throw + 44
2 CoreFoundation 0x017ea4e1 -[NSException raise] + 17
3 Foundation 0x001a7677 _NSSetUsingKeyValueSetter + 135
4 Foundation 0x001a75e5 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 285
5 UIKit 0x0062b30c -[UIRuntimeOutletConnection connect] + 112
6 CoreFoundation 0x017608cf -[NSArray makeObjectsPerformSelector:] + 239
7 UIKit 0x00629d23 -[UINib instantiateWithOwner:options:] + 1041
8 UIKit 0x0062bab7 -[NSBundle(UINSBundleAdditions) loadNibNamed:owner:options:] + 168
9 UIKit 0x004e1628 -[UIViewController _loadViewFromNibNamed:bundle:] + 70
10 UIKit 0x004df134 -[UIViewController loadView] + 120
11 UIKit 0x004df00e -[UIViewController view] + 56
12 UIKit 0x004dd482 -[UIViewController contentScrollView] + 42
13 UIKit 0x004edf25 -[UINavigationController _computeAndApplyScrollContentInsetDeltaForViewController:] + 48
14 UIKit 0x004ec555 -[UINavigationController _layoutViewController:] + 43
15 UIKit 0x004ed7aa -[UINavigationController _startTransition:fromViewController:toViewController:] + 326
16 UIKit 0x004e832a -[UINavigationController _startDeferredTransitionIfNeeded] + 266
17 UIKit 0x004ef562 -[UINavigationController pushViewController:transition:forceImmediate:] + 932
18 UIKit 0x004e81c4 -[UINavigationController pushViewController:animated:] + 62
19 UIKit 0x004f469a -[UIMoreNavigationController pushViewController:animated:] + 105
20 UIKit 0x004a6b68 -[UITableView _selectRowAtIndexPath:animated:scrollPosition:notifyDelegate:] + 1140
21 UIKit 0x0049cb05 -[UITableView _userSelectRowAtPendingSelectionIndexPath:] + 219
22 Foundation 0x001ae79e __NSFireDelayedPerform + 441
23 CoreFoundation 0x017cb8c3 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 19
24 CoreFoundation 0x017cce74 __CFRunLoopDoTimer + 1220
25 CoreFoundation 0x017292c9 __CFRunLoopRun + 1817
26 CoreFoundation 0x01728840 CFRunLoopRunSpecific + 208
27 CoreFoundation 0x01728761 CFRunLoopRunInMode + 97
28 GraphicsServices 0x01dda1c4 GSEventRunModal + 217
29 GraphicsServices 0x01dda289 GSEventRun + 115
30 UIKit 0x0043dc93 UIApplicationMain + 1160
31 ComputerClan 0x00002b02 main + 84
32 ComputerClan 0x00002aa5 start + 53
)
terminate called after throwing an instance of 'NSException'
It seems as if you have a problem in the XIB you are trying to load. Make sure there are no invalid connections, i.e. connections to non-existent IBOutlets or IBActions. Also make sure you haven't defined any objects to be non-existent classes.

iphone app crash

I am getting an error while running app with following exception.
Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<FavoriteViewController 0x158d30> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key customCell.'
*** Call stack at first throw:
(
0 CoreFoundation 0x314d0987 __exceptionPreprocess + 114
1 libobjc.A.dylib 0x319a149d objc_exception_throw + 24
2 CoreFoundation 0x314d0705 -[NSException dealloc] + 0
3 Foundation 0x31d28b4f -[NSObject(NSKeyValueCoding) setValue:forUndefinedKey:] + 182
4 Foundation 0x31d2803b _NSSetUsingKeyValueSetter + 90
5 Foundation 0x31d29da3 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 194
6 Foundation 0x31cdbb17 -[NSObject(NSKeyValueCoding) setValue:forKeyPath:] + 130
7 UIKit 0x33a8860f -[UIRuntimeOutletConnection connect] + 66
8 CoreFoundation 0x31473fc7 -[NSObject(NSObject) performSelector:] + 18
9 CoreFoundation 0x3147cd51 -[NSArray makeObjectsPerformSelector:] + 388
10 UIKit 0x33a87577 -[UINib instantiateWithOwner:options:] + 586
11 UIKit 0x33a88b39 -[NSBundle(UINSBundleAdditions) loadNibNamed:owner:options:] + 92
12 Fridge 0x0001ab11 -[FavoriteViewController tableView:cellForRowAtIndexPath:] + 192
13 UIKit 0x33907a21 -[UITableView(UITableViewInternal) _createPreparedCellForGlobalRow:withIndexPath:] + 516
14 UIKit 0x339077f3 -[UITableView(UITableViewInternal) _createPreparedCellForGlobalRow:] + 34
15 UIKit 0x33905d2d -[UITableView(_UITableViewPrivate) _updateVisibleCellsNow:] + 936
16 UIKit 0x33904edd -[UITableView layoutSubviews] + 140
17 UIKit 0x338b10cf -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 26
18 CoreFoundation 0x3146ebbf -[NSObject(NSObject) performSelector:withObject:] + 22
19 QuartzCore 0x30a6c685 -[CALayer layoutSublayers] + 120
20 QuartzCore 0x30a6c43d CALayerLayoutIfNeeded + 184
21 QuartzCore 0x30a6656d _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 212
22 QuartzCore 0x30a66383 _ZN2CA11Transaction6commitEv + 190
23 QuartzCore 0x30a89f9d _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv + 52
24 CoreFoundation 0x31460c59 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 16
25 CoreFoundation 0x31460acd __CFRunLoopDoObservers + 412
26 CoreFoundation 0x314580cb __CFRunLoopRun + 854
27 CoreFoundation 0x31457c87 CFRunLoopRunSpecific + 230
28 CoreFoundation 0x31457b8f CFRunLoopRunInMode + 58
29 GraphicsServices 0x35d664ab GSEventRunModal + 114
30 GraphicsServices 0x35d66557 GSEventRun + 62
31 UIKit 0x338d5329 -[UIApplication _run] + 412
32 UIKit 0x338d2e93 UIApplicationMain + 670
33 Fridge 0x00002d77 main + 70
34 Fridge 0x00002d2c start + 40
)
The error message: Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[ setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key customCell.'
... means that your xib is referencing an IBOutlet named "customCell" but your view controller doesn't have that IBOutlet anymore. You either need to remove the customCell reference from your xib or add an IBOutlet property to your view controller named "customCell".

app crashes after xib edit

I have a navigation controller app. I created a RootViewController class with Xib file. In that xib file I had table view and nothing more else. Toolbar and buttons on the toolbar I created in program way. Table view had datasourse and delegate File Owner.
I deleted this xib file, and created a new one with previous name. Created it like viewBased xib file and then I dropped down to it table view, toolbar, two buttons on toolbar. Add outlets on them. Saved it all. Clear all targets. Build all. And Run. Application crashes on start! Anyone know where may be the problem? Thanx!
Stack:
[Session started at 2010-11-16 15:00:52 +0200.]
2010-11-16 15:00:53.729 PhoneBook[16210:207] ******* Accessibility Status Changed: On
2010-11-16 15:00:53.755 PhoneBook[16210:207] ********** Loading AX for: com.yourcompany.PhoneBook ************
2010-11-16 15:00:53.798 PhoneBook[16210:207] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '-[UIViewController _loadViewFromNibNamed:bundle:] loaded the "RootViewController" nib but the view outlet was not set.'
*** Call stack at first throw:
(
0 CoreFoundation 0x02510b99 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x0266040e objc_exception_throw + 47
2 CoreFoundation 0x024c9238 +[NSException raise:format:arguments:] + 136
3 CoreFoundation 0x024c91aa +[NSException raise:format:] + 58
4 UIKit 0x0036aa40 -[UIViewController _loadViewFromNibNamed:bundle:] + 295
5 UIKit 0x00368675 -[UIViewController loadView] + 120
6 UIKit 0x004c1c8c -[UITableViewController loadView] + 80
7 UIKit 0x0036854f -[UIViewController view] + 56
8 UIKit 0x003669f4 -[UIViewController contentScrollView] + 42
9 UIKit 0x003767e2 -[UINavigationController _computeAndApplyScrollContentInsetDeltaForViewController:] + 48
10 UIKit 0x00374ea3 -[UINavigationController _layoutViewController:] + 43
11 UIKit 0x0037612d -[UINavigationController _startTransition:fromViewController:toViewController:] + 524
12 UIKit 0x00370ccd -[UINavigationController _startDeferredTransitionIfNeeded] + 266
13 UIKit 0x0048db55 -[UILayoutContainerView layoutSubviews] + 226
14 QuartzCore 0x0456a481 -[CALayer layoutSublayers] + 177
15 QuartzCore 0x0456a1b1 CALayerLayoutIfNeeded + 220
16 QuartzCore 0x045632e0 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 302
17 QuartzCore 0x04563040 _ZN2CA11Transaction6commitEv + 292
18 UIKit 0x002c104e -[UIApplication _reportAppLaunchFinished] + 39
19 UIKit 0x002c1477 -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 545
20 UIKit 0x002cb3ec -[UIApplication handleEvent:withNewEvent:] + 1958
21 UIKit 0x002c3b3c -[UIApplication sendEvent:] + 71
22 UIKit 0x002c89bf _UIApplicationHandleEvent + 7672
23 GraphicsServices 0x02d6c822 PurpleEventCallback + 1550
24 CoreFoundation 0x024f1ff4 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 52
25 CoreFoundation 0x02452807 __CFRunLoopDoSource1 + 215
26 CoreFoundation 0x0244fa93 __CFRunLoopRun + 979
27 CoreFoundation 0x0244f350 CFRunLoopRunSpecific + 208
28 CoreFoundation 0x0244f271 CFRunLoopRunInMode + 97
29 UIKit 0x002c0c6d -[UIApplication _run] + 625
30 UIKit 0x002ccaf2 UIApplicationMain + 1160
31 PhoneBook 0x00002494 main + 102
32 PhoneBook 0x00002425 start + 53
)
terminate called after throwing an instance of 'NSException'
* Terminating app due to uncaught exception
'NSInternalInconsistencyException',
reason: '-[UIViewController
_loadViewFromNibNamed:bundle:] loaded the "RootViewController" nib but the
view outlet was not set.'
Your view controller lost connection for view outlet, you need to restore it in IB (as you do with all outlets)