Autolayout crash in iOS8

[ealeksandrov]

To reproduce:

1. Enable autolayout on IntroPage.xib
2. Run demo project, select showIntroWithCustomViewFromNib
3. Recieve crash:

2015-02-25 22:21:25.829 EAIntroView[5215:1435025] *** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayM objectAtIndex:]: index 5 beyond bounds [0 .. 4]'
*** First throw call stack:
(
    0   CoreFoundation                      0x000000010c1f4f35 __exceptionPreprocess + 165
    1   libobjc.A.dylib                     0x000000010be8dbb7 objc_exception_throw + 45
    2   CoreFoundation                      0x000000010c0dff33 -[__NSArrayM objectAtIndex:] + 227
    3   UIKit                               0x000000010c87b5b1 _UIViewTopDownSubtreeTraversal + 193
    4   UIKit                               0x000000010ceacee6 -[UIView(UIConstraintBasedLayout_EngineDelegate) _invalidateSystemLayoutSizeFittingSizeAtEngineDelegateLevel] + 128
    5   Foundation                          0x000000010ba319bf -[NSISEngine tryToAddConstraintWithMarker:expression:integralizationAdjustment:mutuallyExclusiveConstraints:] + 915
    6   Foundation                          0x000000010bbbb0f8 -[NSLayoutConstraint _addLoweredExpression:toEngine:integralizationAdjustment:lastLoweredConstantWasRounded:mutuallyExclusiveConstraints:] + 275
    7   Foundation                          0x000000010ba2611a -[NSLayoutConstraint _addToEngine:integralizationAdjustment:mutuallyExclusiveConstraints:] + 220
    8   UIKit                               0x000000010cea9de5 __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke_2 + 474
    9   Foundation                          0x000000010ba33d6e -[NSISEngine withBehaviors:performModifications:] + 155
    10  UIKit                               0x000000010cea9beb __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke + 452
    11  UIKit                               0x000000010cea99fe -[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:] + 197
    12  UIKit                               0x000000010cea9ce4 __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke_2 + 217
    13  Foundation                          0x000000010ba33d6e -[NSISEngine withBehaviors:performModifications:] + 155
    14  UIKit                               0x000000010cea9beb __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke + 452
    15  UIKit                               0x000000010cea99fe -[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:] + 197
    16  UIKit                               0x000000010cea9ce4 __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke_2 + 217
    17  Foundation                          0x000000010ba33d6e -[NSISEngine withBehaviors:performModifications:] + 155
    18  UIKit                               0x000000010cea9beb __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke + 452
    19  UIKit                               0x000000010cea99fe -[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:] + 197
    20  UIKit                               0x000000010c8a568b -[UIScrollView _switchToLayoutEngine:] + 69
    21  UIKit                               0x000000010cea9ce4 __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke_2 + 217
    22  Foundation                          0x000000010ba33d6e -[NSISEngine withBehaviors:performModifications:] + 155
    23  UIKit                               0x000000010cea9beb __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke + 452
    24  UIKit                               0x000000010cea99fe -[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:] + 197
    25  UIKit                               0x000000010cea9ce4 __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke_2 + 217
    26  Foundation                          0x000000010ba33d6e -[NSISEngine withBehaviors:performModifications:] + 155
    27  UIKit                               0x000000010cea9beb __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke + 452
    28  UIKit                               0x000000010cea99fe -[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:] + 197
    29  UIKit                               0x000000010cea9671 -[UIView(AdditionalLayoutSupport) _initializeHostedLayoutEngine] + 404
    30  UIKit                               0x000000010ce9e591 -[UIView(UIConstraintBasedLayout) _layoutEngine_windowDidChange] + 127
    31  UIKit                               0x000000010c8984a5 -[UIView(Internal) _didMoveFromWindow:toWindow:] + 207
    32  UIKit                               0x000000010c891112 __45-[UIView(Hierarchy) _postMovedFromSuperview:]_block_invoke + 125
    33  UIKit                               0x000000010c891086 -[UIView(Hierarchy) _postMovedFromSuperview:] + 437
    34  UIKit                               0x000000010c89af4b -[UIView(Internal) _addSubview:positioned:relativeTo:] + 1604
    35  UIKit                               0x000000010cabfe84 -[UILayoutContainerView addSubview:] + 75
    36  EAIntroView                         0x000000010b93e14a -[EAIntroView showInView:animateDuration:withInitialPageIndex:] + 362
    37  EAIntroView                         0x000000010b93dfc9 -[EAIntroView showInView:animateDuration:] + 121
    38  EAIntroView                         0x000000010b9303a7 -[ViewController showIntroWithCustomViewFromNib] + 1879
    39  EAIntroView                         0x000000010b9326a4 -[ViewController tableView:didSelectRowAtIndexPath:] + 340
    40  UIKit                               0x000000010c90c393 -[UITableView _selectRowAtIndexPath:animated:scrollPosition:notifyDelegate:] + 1293
    41  UIKit                               0x000000010c90c4d4 -[UITableView _userSelectRowAtPendingSelectionIndexPath:] + 219
    42  UIKit                               0x000000010c847331 _applyBlockToCFArrayCopiedToStack + 314
    43  UIKit                               0x000000010c8471ab _afterCACommitHandler + 516
    44  CoreFoundation                      0x000000010c129dc7 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23
    45  CoreFoundation                      0x000000010c129d20 __CFRunLoopDoObservers + 368
    46  CoreFoundation                      0x000000010c11fb53 __CFRunLoopRun + 1123
    47  CoreFoundation                      0x000000010c11f486 CFRunLoopRunSpecific + 470
    48  GraphicsServices                    0x00000001106f59f0 GSEventRunModal + 161
    49  UIKit                               0x000000010c824420 UIApplicationMain + 1282
    50  EAIntroView                         0x000000010b932843 main + 115
    51  libdyld.dylib                       0x000000010e9c7145 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

Related: http://stackoverflow.com/questions/25878621/nsrangeexception-on-ios-8
Solution from SO:

Turning AutoLayout off for all of my XIBs solved the issue.

But: If you'll launch and close different intro example before opening autolaouyt one - it will work perfectly without crashing.

[hbthlw]

same problem with you

[hkellaway]

same issue encountered

[panzerdp]

same problem here with version 2.7.0.

[zmillman]

Ditto.

Removing the skip button with [[intro skipButton] removeFromSuperview]; at least makes the application not crash.

[davecom]

Does anybody have a temporary workaround/fix? I tried removing the skip button and that appeared to have no effect.

[hkellaway]

@davecom unless you need whatever functionality 2.7 introduced, use 2.6

[davecom]

Thanks, yes I downgraded to 2.6.4 and have resolved the crashing issue. However, I was using the bgColor functionality in 2.7... alas!

[ealeksandrov]

I found the cause of this issue, now working on bugfix.

[panzerdp]

@ealeksandrov thanks!

[mohitngm]

Hi @ealeksandrov any update on this issue causing crash in iOS 8.3. its happening in release build for me not on debug build.

[ealeksandrov]

It related with addSubview: override on ScrollVIew subclass. Working on ways to fix it.

[igostavro]

Hi guys,

Any update on a fix?

[mohitngm]

@igostavro .. till then you can use pod 'EAIntroView', '~> 2.6.4' and

if want to use bgColor use bgImage

EAIntroPage *page1 = [EAIntroPage page];
as page1.bgImage = [UIColor imageFromColor:[UIColor redColor]];

+ (UIImage *)imageFromColor:(UIColor *)color
{
    CGRect rect = CGRectMake(0.0f, 0.0f, 1.0f, 1.0f);
    UIGraphicsBeginImageContext(rect.size);
    CGContextRef context = UIGraphicsGetCurrentContext();

    CGContextSetFillColorWithColor(context, [color CGColor]);
    CGContextFillRect(context, rect);

    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    return image;
}

[igostavro]

Way ahead of you:-) Thanks!

[Omarj]

@ealeksandrov @mohitngm any update ?

[Reedyuk]

I'm also looking for an update on this too

[flywww]

Waiting for update

[Omarj]

@ealeksandrov app crash when this method get called

+ (instancetype)pageWithCustomView:(UIView *)customV {
    EAIntroPage *newPage = [[self alloc] init];
    newPage.customView = customV;
    newPage.bgColor = customV.backgroundColor;
    return newPage;
}

and if u choose showIntroWithCustomPages first the other option will work with no problem.

try to showIntroWithCustomPages --then--> showIntroWithCustomView

[ealeksandrov]

🎉

I finally found a root cause of this issue: EARestrictedScrollView.m#L54-56

Autolayout somehow uses subview property and overriding it - breaks things. This depends on many other things, as many contributors shared above, but fixing subviews deals it for me in 100% of cases.

I will merge all changes and push new version of EARestrictedScrollView. After this, EAIntroView will be updated and pushed on Cocoapods as well.