出错，log非常多：
2016-04-27 20:39:00.619 [Debug] [com.apple.root.background-qos] [GlobalFunctions.swift:331] calcTimeStart > StoreConversationItemList 2016-04-27 20:39:00.646 [Info] [com.apple.root.background-qos] [ConversationViewController.swift:51] reallyStoreData() > save conversationItemList true for 15 items to /Users/crifan/Library/Developer/CoreSimulator/Devices/63F89987-3382-42A5-BC13-AE102BEF98DB/data/Containers/Data/Application/A130B9B6-1014-406E-9B9F-E3A4D0C9956E/Documents/user-08da3990-9708-4338-ba5e-cff0586e0af8/Conversation/conversationItemList 2016-04-27 20:39:00.647 [Debug] [com.apple.root.background-qos] [GlobalFunctions.swift:342] calcTimeEnd > StoreConversationItemList elapsedTime=0.0271 2016-04-27 20:39:06.158 JianDao[7200:335942] This application is modifying the autolayout engine from a background thread, which can lead to engine corruption and weird crashes. This will cause an exception in a future release. Stack:( 0 CoreFoundation 0x032e0494 __exceptionPreprocess + 180 1 libobjc.A.dylib 0x045a4e02 objc_exception_throw + 50 2 CoreFoundation 0x032e03bd +[NSException raise:format:] + 141 3 Foundation 0x0273df4e _AssertAutolayoutOnMainThreadOnly + 96 4 Foundation 0x025653c4 -[NSISEngine withBehaviors:performModifications:] + 26 5 Foundation 0x0256891c -[NSISEngine withAutomaticOptimizationDisabled:] + 48 6 UIKit 0x015bf0e8 -[UIView(AdditionalLayoutSupport) _withAutomaticEngineOptimizationDisabledIfEngineExists:] + 75 7 UIKit 0x015bfd61 -[UIView(AdditionalLayoutSupport) updateConstraintsIfNeeded] + 278 8 UIKit 0x015c0c4c -[UIView(AdditionalLayoutSupport) _updateConstraintsAtEngineLevelIfNeeded] + 372 9 UIKit 0x00c6757e -[UIView(Hierarchy) _updateConstraintsAsNecessaryAndApplyLayoutFromEngine] + 173 10 UIKit 0x00c7940a -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 864 11 libobjc.A.dylib 0x045b9059 -[NSObject performSelector:withObject:] + 70 12 QuartzCore 0x04490096 -[CALayer layoutSublayers] + 144 13 QuartzCore 0x044838b6 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 388 14 QuartzCore 0x0448371a _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 26 15 QuartzCore 0x04475ee7 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 317 16 QuartzCore 0x044aa847 _ZN2CA11Transaction6commitEv + 561 17 QuartzCore 0x044aabef _ZN2CA11Transaction14release_threadEPv + 289 18 libsystem_pthread.dylib 0x0559b29d _pthread_tsd_cleanup + 537 19 libsystem_pthread.dylib 0x0559ae22 _pthread_exit + 108 20 libsystem_pthread.dylib 0x05599354 pthread_attr_getschedpolicy + 0 21 libsystem_pthread.dylib 0x05596f56 start_wqthread + 34 ) 2016-04-27 20:39:06.161 JianDao[7200:335942] This application is modifying the autolayout engine from a background thread, which can lead to engine corruption and weird crashes. This will cause an exception in a future release. Stack:( 0 CoreFoundation 0x032e0494 __exceptionPreprocess + 180 1 libobjc.A.dylib 0x045a4e02 objc_exception_throw + 50 2 CoreFoundation 0x032e03bd +[NSException raise:format:] + 141 3 Foundation 0x0273df4e _AssertAutolayoutOnMainThreadOnly + 96 4 Foundation 0x025653c4 -[NSISEngine withBehaviors:performModifications:] + 26 5 Foundation 0x0256891c -[NSISEngine withAutomaticOptimizationDisabled:] + 48 6 UIKit 0x015bf0e8 -[UIView(AdditionalLayoutSupport) _withAutomaticEngineOptimizationDisabledIfEngineExists:] + 75 7 UIKit 0x015bfb4d -[UIView(AdditionalLayoutSupport) _updateConstraintsIfNeededAccumulatingViewsNeedingSecondPassAndViewsNeedingBaselineUpdate:forSecondPass:] + 149 8 UIKit 0x015c02b0 __60-[UIView(AdditionalLayoutSupport) updateConstraintsIfNeeded]_block_invoke + 113 9 Foundation 0x02565440 -[NSISEngine withBehaviors:performModifications:] + 150 10 Foundation 0x0256891c -[NSISEngine withAutomaticOptimizationDisabled:] + 48 11 UIKit 0x015bf0e8 -[UIView(AdditionalLayoutSupport) _withAutomaticEngineOptimizationDisabledIfEngineExists:] + 75 12 UIKit 0x015bfd61 -[UIView(AdditionalLayoutSupport) updateConstraintsIfNeeded] + 278 13 UIKit 0x015c0c4c -[UIView(AdditionalLayoutSupport) _updateConstraintsAtEngineLevelIfNeeded] + 372 14 UIKit 0x00c6757e -[UIView(Hierarchy) _updateConstraintsAsNecessaryAndApplyLayoutFromEngine] + 173 15 UIKit 0x00c7940a -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 864 16 libobjc.A.dylib 0x045b9059 -[NSObject performSelector:withObject:] + 70 17 QuartzCore 0x04490096 -[CALayer layoutSublayers] + 144 18 QuartzCore 0x044838b6 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 388 19 QuartzCore 0x0448371a _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 26 20 QuartzCore 0x04475ee7 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 317 21 QuartzCore 0x044aa847 _ZN2CA11Transaction6commitEv + 561 22 QuartzCore 0x044aabef _ZN2CA11Transaction14release_threadEPv + 289 23 libsystem_pthread.dylib 0x0559b29d _pthread_tsd_cleanup + 537 24 libsystem_pthread.dylib 0x0559ae22 _pthread_exit + 108 25 libsystem_pthread.dylib 0x05599354 pthread_attr_getschedpolicy + 0 26 libsystem_pthread.dylib 0x05596f56 start_wqthread + 34 ) 。。。 2016-04-27 20:39:16.506 [Debug] [main] [MainViewController.swift:541] websocketKeepConnect() > gCurUserItem.hasLogined=true, gCurUserItem.wsInited=true |
之前遇到过2次类似问题：
［已解决］swift中代码运行出错：This application is modifying the autolayout engine from a background thread
也都是把对应的内容改为
放到主线程，即可。
但是此处不知道哪里的原因导致此问题。
application is modifying the autolayout engine from a background thread解决方案 – SomeBod_Y – 博客园
This application is modifying the autolayout en… | Apple Developer Forums
最后调试了半天，终于找到原因了：
此处的：
//switch to Main View Controller resetMainVC() showMainView() |
两个都是和视图控制器相关的：
//Note: makesure call this in main thread !!! func resetMainVC() -> MainViewController { gLog.debug("") gMainVC = MainViewController() return gMainVC } //Note: makesure call this in main thread !!! func showMainView(){ gLog.debug("") setNaviRootVC(SingletonMainVC()) } //Note: makesure call this in main thread !!! func setNaviRootVC(rootVC:UIViewController){ gLog.debug("rootVC=\(rootVC)") SingletonRootNC().setViewControllers([rootVC], animated: false) // SingletonRootNC().viewControllers = [rootVC] } |
都必须保证，要在主线程中调用
否则就会出现上面的警告。。。
哎：
iOS和Xcode，还是不够智能：
没法提示，到底是哪个函数，被在非主线程中调用
－》只能自己一点点调试自己刚刚修改的代码，找到具体是哪里才行。。。
－》此处就是把上面的代码，确保在，属于主线程的didFinishLaunchingWithOptions中调用，或者是：
func dispatchMain_async(thingsTodo:()->()) { let mainQueue = dispatch_get_main_queue() dispatch_async(mainQueue, thingsTodo) } dispatchMain_async({ //switch to Main View Controller resetMainVC() showMainView() }) |
才可以。
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