My app keeps getting crashed for the same reason in some iphone(iOS 17) and I need help. Here is the lastExceptionBacktrace.
"lastExceptionBacktrace" : [ {"imageOffset":972256,"symbol":"__exceptionPreprocess","symbolLocation":164,"imageIndex":10}, {"imageOffset":179200,"symbol":"objc_exception_throw","symbolLocation":60,"imageIndex":7}, {"imageOffset":1516452,"symbol":"-[NSException initWithCoder:]","symbolLocation":0,"imageIndex":10}, {"imageOffset":195548,"symbol":"CA::Layer::set_position(CA::Vec2<double> const&, bool)","symbolLocation":168,"imageIndex":19}, {"imageOffset":195340,"symbol":"-[CALayer setPosition:]","symbolLocation":52,"imageIndex":19}, {"imageOffset":195204,"symbol":"-[CALayer setFrame:]","symbolLocation":396,"imageIndex":19}, {"imageOffset":409656,"symbol":"__26-[_UILabelLayer setFrame:]_block_invoke","symbolLocation":56,"imageIndex":12}, {"imageOffset":409388,"symbol":"-[_UILabelLayer _setFrameOrBounds:settingAction:]","symbolLocation":60,"imageIndex":12}, {"imageOffset":426392,"symbol":"-[_UILabelLayer setFrame:]","symbolLocation":104,"imageIndex":12}, {"imageOffset":104744,"symbol":"-[UIView _backing_setFrame:]","symbolLocation":240,"imageIndex":12}, {"imageOffset":97808,"symbol":"-[UIView(Geometry) setFrame:]","symbolLocation":296,"imageIndex":12}, {"imageOffset":106944,"symbol":"-[UILabel setFrame:]","symbolLocation":112,"imageIndex":12}, {"imageOffset":16705216,"symbol":"-[UITableViewHeaderFooterView layoutSubviews]","symbolLocation":220,"imageIndex":12}, {"imageOffset":209368,"symbol":"-[UIView(CALayerDelegate) layoutSublayersOfLayer:]","symbolLocation":1528,"imageIndex":12}, {"imageOffset":424072,"symbol":"CA::Layer::layout_if_needed(CA::Transaction*)","symbolLocation":500,"imageIndex":19}, {"imageOffset":221860,"symbol":"-[UIView(Hierarchy) layoutBelowIfNeeded]","symbolLocation":308,"imageIndex":12}, {"imageOffset":16700796,"symbol":"-[UITableViewHeaderFooterView _sizeThatFits:stripPaddingForAbuttingView:isTopHeader:]","symbolLocation":192,"imageIndex":12}, {"imageOffset":16733416,"symbol":"-[UISectionRowData _headerFooterSizeForSection:inTable:withTitle:detailText:isHeader:stripPaddingForAbuttingView:isTopHeader:]","symbolLocation":680,"imageIndex":12}, {"imageOffset":2595124,"symbol":"-[UISectionRowData refreshWithSection:tableView:tableViewRowData:]","symbolLocation":464,"imageIndex":12}, {"imageOffset":2604748,"symbol":"-[UITableViewRowData rectForFooterInSection:heightCanBeGuessed:]","symbolLocation":104,"imageIndex":12}, {"imageOffset":2604572,"symbol":"-[UITableViewRowData heightForTable]","symbolLocation":52,"imageIndex":12}, {"imageOffset":2599644,"symbol":"-[UITableView _updateContentSizeSkippingContentOffsetAdjustment:]","symbolLocation":168,"imageIndex":12}, {"imageOffset":16599748,"symbol":"-[UITableView _rebuildGeometryForcingRowDataUpdate:skipContentOffsetAdjustment:updateImmediatelyIfPossible:]","symbolLocation":140,"imageIndex":12}, {"imageOffset":16595412,"symbol":"-[UITableView setLayoutMargins:]","symbolLocation":204,"imageIndex":12}, {"imageOffset":16595180,"symbol":"-[UITableView _setDefaultLayoutMargins:]","symbolLocation":52,"imageIndex":12}, {"imageOffset":16595032,"symbol":"-[UITableView didMoveToWindow]","symbolLocation":288,"imageIndex":12}, {"imageOffset":74184,"symbol":"-[UIView(Internal) _didMoveFromWindow:toWindow:]","symbolLocation":1716,"imageIndex":12}, {"imageOffset":1969584,"symbol":"-[UIScrollView _didMoveFromWindow:toWindow:]","symbolLocation":88,"imageIndex":12}, {"imageOffset":73152,"symbol":"-[UIView(Internal) _didMoveFromWindow:toWindow:]","symbolLocation":684,"imageIndex":12}, {"imageOffset":71756,"symbol":"__45-[UIView(Hierarchy) _postMovedFromSuperview:]_block_invoke","symbolLocation":124,"imageIndex":12}, {"imageOffset":71520,"symbol":"-[UIView _postMovedFromSuperview:]","symbolLocation":484,"imageIndex":12}, {"imageOffset":66468,"symbol":"-[UIView(Internal) _addSubview:positioned:relativeTo:]","symbolLocation":2180,"imageIndex":12}, {"imageOffset":555240,"symbol":"-[UIWindow addRootViewControllerViewIfPossible]","symbolLocation":728,"imageIndex":12}, {"imageOffset":1651088,"symbol":"-[UIWindow setRootViewController:]","symbolLocation":364,"imageIndex":12}, {"imageOffset":27056,"imageIndex":2}, {"imageOffset":26016,"imageIndex":2}, {"imageOffset":2179544,"symbol":"-[UIApplication _handleDelegateCallbacksWithOptions:isSuspended:restoreState:]","symbolLocation":320,"imageIndex":12},
......
{"imageOffset":2433472,"symbol":"-[UIApplicationSceneClientAgent scene:didInitializeWithEvent:completion:]","symbolLocation":288,"imageIndex":12}, {"imageOffset":60072,"symbol":"-[FBSScene _callOutQueue_didCreateWithTransitionContext:completion:]","symbolLocation":324,"imageIndex":9}, {"imageOffset":59716,"symbol":"__92-[FBSWorkspaceScenesClient createSceneWithIdentity:parameters:transitionContext:completion:]_block_invoke.108","symbolLocation":280,"imageIndex":9}, {"imageOffset":54696,"symbol":"-[FBSWorkspace _calloutQueue_executeCalloutFromSource:withBlock:]","symbolLocation":168,"imageIndex":9}, {"imageOffset":103264,"symbol":"__92-[FBSWorkspaceScenesClient createSceneWithIdentity:parameters:transitionContext:completion:]_block_invoke","symbolLocation":352,"imageIndex":9}, {"imageOffset":17152,"symbol":"_dispatch_client_callout","symbolLocation":20,"imageIndex":8}, {"imageOffset":32072,"symbol":"_dispatch_block_invoke_direct","symbolLocation":284,"imageIndex":8}, {"imageOffset":39404,"symbol":"FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK","symbolLocation":52,"imageIndex":9}, {"imageOffset":39276,"symbol":"-[FBSMainRunLoopSerialQueue _targetQueue_performNextIfPossible]","symbolLocation":240,"imageIndex":9}, {"imageOffset":38980,"symbol":"-[FBSMainRunLoopSerialQueue _performNextFromRunLoopSource]","symbolLocation":28,"imageIndex":9}, {"imageOffset":228044,"symbol":"CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION","symbolLocation":28,"imageIndex":10}, {"imageOffset":224584,"symbol":"__CFRunLoopDoSource0","symbolLocation":176,"imageIndex":10}, {"imageOffset":218460,"symbol":"__CFRunLoopDoSources0","symbolLocation":340,"imageIndex":10}, {"imageOffset":213560,"symbol":"__CFRunLoopRun","symbolLocation":828,"imageIndex":10}, {"imageOffset":212504,"symbol":"CFRunLoopRunSpecific","symbolLocation":608,"imageIndex":10}, {"imageOffset":13804,"symbol":"GSEventRunModal","symbolLocation":164,"imageIndex":11}, {"imageOffset":2290512,"symbol":"-[UIApplication _run]","symbolLocation":888,"imageIndex":12}, {"imageOffset":2288012,"symbol":"UIApplicationMain","symbolLocation":340,"imageIndex":12}, {"imageOffset":24608,"imageIndex":2}, {"imageOffset":23876,"symbol":"start","symbolLocation":2104,"imageIndex":13} ],
My experience is that exceptions thrown from CA geometry routines, like this CA::Layer::set_position(…) method, are most often caused by one of the coordinates being a NaN.
We have checkd the source of the application for a while time . There are no NaN coordinates settings was found. So We don't know how to prevent it on our application side. We think it occurred in the processing part inside UIKit.
Here are some more details about this problem.
- Our app is compiled with iOS6 as iOS Deployment Target. The app is crashing on an iOS 17/iPadOS 17 device.
- Since iOS 6, many frame-drawing related fixes have been made.
- When we changed iOS Deployment Target to 12 or later, Xcode displayed that frame-related fixes were required.
- When we changed iOS Deployment Target to 12 or later and recompiled, the problem no longer occurred on the device where the problem occurred before.
From the above, we think that the structure related to the screen frame has been expanded and the number of members has increased due to the influence of many modifications. When iOS Deployment Target passes memory in 6.0 or later, it refers to the members of the extended part of the memory (inappropriate area) in iOS 17, It is assumed that the initialization process was performed with an incorrect value and terminated abnormally.
Is this understanding correct? Is it okay to change iOS Deployment Target to 12 or later to solve this problem?
Furthermore，here are some questions.
- Is there a way for the application to prevent one of the coordinates from becoming NaN？
- Is it necessary to recompiled apps that target an old OS (older than the minimum deployment target os supported by the latest Xcode）to match the minimum deployment target os of the latest Xcode?
Please help us, thanks！