Xamarin 第二次加载uiviewcontroller时出现异常
我希望你能帮助我 我正在开发一个iOS Xamarin应用程序，我有一个带有tableView的UIViewController，我从一行加载另一个UIViewController。第一次，它工作正常，加载下一个UIViewController时没有任何问题，但我从导航控制器返回按钮（自动返回）返回，当我尝试再次打开同一行并再次加载同一UIViewController时，它会抛出一个我无法调试的异常，它只是停止和中断，但在我的代码的任何一行中都不会停止。似乎是内在的东西。 也许我不想要一个解决方案，因为它可能是我项目中的一个特定问题，但至少我需要学习如何调试此类错误，因为后续工作非常困难。 我将完整的跟踪粘贴到下面：Xamarin 第二次加载uiviewcontroller时出现异常,xamarin,xamarin.ios,Xamarin,Xamarin.ios,我希望你能帮助我 我正在开发一个iOS Xamarin应用程序，我有一个带有tableView的UIViewController，我从一行加载另一个UIViewController。第一次，它工作正常，加载下一个UIViewController时没有任何问题，但我从导航控制器返回按钮（自动返回）返回，当我尝试再次打开同一行并再次加载同一UIViewController时，它会抛出一个我无法调试的异常，它只是停止和中断，但在我的代码的任何一行中都不会停止。似乎是内在的东西。 也许我不想要一个解决方
2017-02-08 15:22:39.896 WorkFormGoFelixiOS[5150:4809781] Unhandled managed exception:
Value cannot be null.
Parameter name: view1 (System.ArgumentNullException)
at (wrapper managed-to-native) UIKit.UIApplication:UIApplicationMain (int,string[],intptr,intptr)
at UIKit.UIApplication.Main (System.String[] args, System.IntPtr principal, System.IntPtr delegate) [0x00005] in /Users/builder/data/lanes/3988/e02d2723/source/xamarin-macios/src/UIKit/UIApplication.cs:79
at UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x00038] in /Users/builder/data/lanes/3988/e02d2723/source/xamarin-macios/src/UIKit/UIApplication.cs:63
at WorkFormGo.Felix.iOS.Application.Main (System.String[] args) [0x00001] in D:\Repository\Felixx\Produkte\Workform\Solutions\WorkFormGo\WorkFormGo.Felix\WorkFormGo.Felix.iOS\Main.cs:17
2017-02-08 15:22:39.896 WorkFormGoFelixiOS[5150:4809781] critical: Stacktrace:
2017-02-08 15:22:39.896 WorkFormGoFelixiOS[5150:4809781] critical:
Native stacktrace:
2017-02-08 15:22:39.979 WorkFormGoFelixiOS[5150:4809781] critical: 0 WorkFormGoFelixiOS 0x0010224d mono_handle_native_sigsegv + 317
2017-02-08 15:22:39.979 WorkFormGoFelixiOS[5150:4809781] critical: 1 WorkFormGoFelixiOS 0x0010b9b1 sigabrt_signal_handler + 161
2017-02-08 15:22:39.979 WorkFormGoFelixiOS[5150:4809781] critical: 2 libsystem_platform.dylib 0x04e8479b _sigtramp + 43
2017-02-08 15:22:39.980 WorkFormGoFelixiOS[5150:4809781] critical: 3 ??? 0xffffffff 0x0 + 4294967295
2017-02-08 15:22:39.980 WorkFormGoFelixiOS[5150:4809781] critical: 4 libsystem_c.dylib 0x04bfa11f abort + 141
2017-02-08 15:22:39.980 WorkFormGoFelixiOS[5150:4809781] critical: 5 WorkFormGoFelixiOS 0x002a38e0 _ZL20print_all_exceptionsP10MonoObject + 0
2017-02-08 15:22:39.980 WorkFormGoFelixiOS[5150:4809781] critical: 6 WorkFormGoFelixiOS 0x00102b60 mono_invoke_unhandled_exception_hook + 96
2017-02-08 15:22:39.981 WorkFormGoFelixiOS[5150:4809781] critical: 7 WorkFormGoFelixiOS 0x0010192b mono_handle_exception_internal + 5611
2017-02-08 15:22:39.981 WorkFormGoFelixiOS[5150:4809781] critical: 8 WorkFormGoFelixiOS 0x00100339 mono_handle_exception + 41
2017-02-08 15:22:39.981 WorkFormGoFelixiOS[5150:4809781] critical: 9 WorkFormGoFelixiOS 0x000990a6 mono_x86_throw_exception + 182
2017-02-08 15:22:39.982 WorkFormGoFelixiOS[5150:4809781] critical: 10 ??? 0x0f427b57 0x0 + 256015191
2017-02-08 15:22:39.982 WorkFormGoFelixiOS[5150:4809781] critical: 11 WorkFormGoFelixiOS 0x002a9c4c xamarin_invoke_trampoline + 8892
2017-02-08 15:22:39.982 WorkFormGoFelixiOS[5150:4809781] critical: 12 WorkFormGoFelixiOS 0x002b0c6c xamarin_arch_trampoline + 156
2017-02-08 15:22:39.983 WorkFormGoFelixiOS[5150:4809781] critical: 13 WorkFormGoFelixiOS 0x002b1346 xamarin_i386_common_trampoline + 36
2017-02-08 15:22:39.983 WorkFormGoFelixiOS[5150:4809781] critical: 14 UIKit 0x01462d83 -[UIView(AdditionalLayoutSupport) _sendUpdateConstraintsIfNecessaryForSecondPass:] + 168
2017-02-08 15:22:39.983 WorkFormGoFelixiOS[5150:4809781] critical: 15 UIKit 0x014631a6 -[UIView(AdditionalLayoutSupport) _updateConstraintsIfNeededCollectingViews:forSecondPass:] + 821
2017-02-08 15:22:39.983 WorkFormGoFelixiOS[5150:4809781] critical: 16 UIKit 0x01463451 -[UIView(AdditionalLayoutSupport) _recursiveUpdateConstraintsIfNeededCollectingViews:forSecondPass:] + 139
2017-02-08 15:22:39.984 WorkFormGoFelixiOS[5150:4809781] critical: 17 UIKit 0x01463104 -[UIView(AdditionalLayoutSupport) _updateConstraintsIfNeededCollectingViews:forSecondPass:] + 659
2017-02-08 15:22:39.984 WorkFormGoFelixiOS[5150:4809781] critical: 18 UIKit 0x01463451 -[UIView(AdditionalLayoutSupport) _recursiveUpdateConstraintsIfNeededCollectingViews:forSecondPass:] + 139
2017-02-08 15:22:39.985 WorkFormGoFelixiOS[5150:4809781] critical: 19 UIKit 0x01463104 -[UIView(AdditionalLayoutSupport) _updateConstraintsIfNeededCollectingViews:forSecondPass:] + 659
2017-02-08 15:22:39.985 WorkFormGoFelixiOS[5150:4809781] critical: 20 UIKit 0x01463451 -[UIView(AdditionalLayoutSupport) _recursiveUpdateConstraintsIfNeededCollectingViews:forSecondPass:] + 139
2017-02-08 15:22:39.985 WorkFormGoFelixiOS[5150:4809781] critical: 21 UIKit 0x01463104 -[UIView(AdditionalLayoutSupport) _updateConstraintsIfNeededCollectingViews:forSecondPass:] + 659
2017-02-08 15:22:39.985 WorkFormGoFelixiOS[5150:4809781] critical: 22 UIKit 0x01463451 -[UIView(AdditionalLayoutSupport) _recursiveUpdateConstraintsIfNeededCollectingViews:forSecondPass:] + 139
2017-02-08 15:22:39.986 WorkFormGoFelixiOS[5150:4809781] critical: 23 UIKit 0x01463104 -[UIView(AdditionalLayoutSupport) _updateConstraintsIfNeededCollectingViews:forSecondPass:] + 659
2017-02-08 15:22:39.986 WorkFormGoFelixiOS[5150:4809781] critical: 24 UIKit 0x01463451 -[UIView(AdditionalLayoutSupport) _recursiveUpdateConstraintsIfNeededCollectingViews:forSecondPass:] + 139
2017-02-08 15:22:39.986 WorkFormGoFelixiOS[5150:4809781] critical: 25 UIKit 0x01463104 -[UIView(AdditionalLayoutSupport) _updateConstraintsIfNeededCollectingViews:forSecondPass:] + 659
2017-02-08 15:22:39.987 WorkFormGoFelixiOS[5150:4809781] critical: 26 UIKit 0x01463afc __97-[UIView(AdditionalLayoutSupport) _updateConstraintsIfNeededPostponeVariableChangeNotifications:]_block_invoke_2 + 34
2017-02-08 15:22:39.987 WorkFormGoFelixiOS[5150:4809781] critical: 27 Foundation 0x00510122 -[NSISEngine withBehaviors:performModifications:] + 152
2017-02-08 15:22:39.987 WorkFormGoFelixiOS[5150:4809781] critical: 28 Foundation 0x00510085 -[NSISEngine withAutomaticOptimizationDisabled:] + 31
2017-02-08 15:22:39.988 WorkFormGoFelixiOS[5150:4809781] critical: 29 UIKit 0x01462826 -[UIView(AdditionalLayoutSupport) _withAutomaticEngineOptimizationDisabledIfEngineExists:] + 54
2017-02-08 15:22:39.988 WorkFormGoFelixiOS[5150:4809781] critical: 30 UIKit 0x01463ad4 __97-[UIView(AdditionalLayoutSupport) _updateConstraintsIfNeededPostponeVariableChangeNotifications:]_block_invoke + 88
2017-02-08 15:22:39.988 WorkFormGoFelixiOS[5150:4809781] critical: 31 UIKit 0x014628b7 -[UIView(AdditionalLayoutSupport) _withUnsatisfiableConstraintsLoggingSuspendedIfEngineDelegateExists:] + 129
2017-02-08 15:22:39.988 WorkFormGoFelixiOS[5150:4809781] critical: 32 UIKit 0x014635aa -[UIView(AdditionalLayoutSupport) _updateConstraintsIfNeededPostponeVariableChangeNotifications:] + 185
2017-02-08 15:22:39.989 WorkFormGoFelixiOS[5150:4809781] critical: 33 UIKit 0x01464802 -[UIView(AdditionalLayoutSupport) _updateConstraintsAtEngineLevelIfNeededPostponeVariableChangeNotifications:] + 463
2017-02-08 15:22:39.989 WorkFormGoFelixiOS[5150:4809781] critical: 34 UIKit 0x01464cd7 -[UIView(AdditionalLayoutSupport) _updateConstraintsAtEngineLevelIfNeeded] + 31
2017-02-08 15:22:39.989 WorkFormGoFelixiOS[5150:4809781] critical: 35 UIKit 0x00a745ff -[UIView(Hierarchy) _updateConstraintsAsNecessaryAndApplyLayoutFromEngine] + 169
2017-02-08 15:22:39.990 WorkFormGoFelixiOS[5150:4809781] critical: 36 UIKit 0x00a74fed -[UIView(Hierarchy) layoutSubviews] + 573
2017-02-08 15:22:39.990 WorkFormGoFelixiOS[5150:4809781] critical: 37 UIKit 0x00dec8c7 -[UILayoutContainerView layoutSubviews] + 273
2017-02-08 15:22:39.990 WorkFormGoFelixiOS[5150:4809781] critical: 38 UIKit 0x00a87374 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 1457
2017-02-08 15:22:39.992 WorkFormGoFelixiOS[5150:4809781] critical: 39 libobjc.A.dylib 0x03da61b9 -[NSObject performSelector:withObject:] + 59
2017-02-08 15:22:39.992 WorkFormGoFelixiOS[5150:4809781] critical: 40 QuartzCore 0x028d374d -[CALayer layoutSublayers] + 141
2017-02-08 15:22:39.992 WorkFormGoFelixiOS[5150:4809781] critical: 41 QuartzCore 0x028c6a2b _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 401
2017-02-08 15:22:39.993 WorkFormGoFelixiOS[5150:4809781] critical: 42 QuartzCore 0x028c6881 _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 21
2017-02-08 15:22:39.993 WorkFormGoFelixiOS[5150:4809781] critical: 43 QuartzCore 0x028504c7 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 339
2017-02-08 15:22:39.993 WorkFormGoFelixiOS[5150:4809781] critical: 44 QuartzCore 0x0287f2b8 _ZN2CA11Transaction6commitEv + 498
2017-02-08 15:22:39.993 WorkFormGoFelixiOS[5150:4809781] critical: 45 QuartzCore 0x02880dc8 _ZN2CA11Transaction17flush_transactionEv + 38
2017-02-08 15:22:39.994 WorkFormGoFelixiOS[5150:4809781] critical: 46 UIKit 0x009e144c _afterCACommitHandler + 375
2017-02-08 15:22:39.994 WorkFormGoFelixiOS[5150:4809781] critical: 47 CoreFoundation 0x0383676e __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 30
2017-02-08 15:22:39.994 WorkFormGoFelixiOS[5150:4809781] critical: 48 CoreFoundation 0x038366c7 __CFRunLoopDoObservers + 391
2017-02-08 15:22:39.995 WorkFormGoFelixiOS[5150:4809781] critical: 49 CoreFoundation 0x0381a3a6 __CFRunLoopRun + 1414
2017-02-08 15:22:39.995 WorkFormGoFelixiOS[5150:4809781] critical: 50 CoreFoundation 0x03819bab CFRunLoopRunSpecific + 395
2017-02-08 15:22:39.995 WorkFormGoFelixiOS[5150:4809781] critical: 51 CoreFoundation 0x03819a0b CFRunLoopRunInMode + 123
2017-02-08 15:22:39.995 WorkFormGoFelixiOS[5150:4809781] critical: 52 GraphicsServices 0x059bfb4c GSEventRunModal + 177
2017-02-08 15:22:39.996 WorkFormGoFelixiOS[5150:4809781] critical: 53 GraphicsServices 0x059bf9c7 GSEventRun + 80
2017-02-08 15:22:39.996 WorkFormGoFelixiOS[5150:4809781] critical: 54 UIKit 0x009b232b UIApplicationMain + 148
2017-02-08 15:22:39.996 WorkFormGoFelixiOS[5150:4809781] critical: 55 ??? 0x100dab64 0x0 + 269331300
2017-02-08 15:22:39.997 WorkFormGoFelixiOS[5150:4809781] critical: 56 ??? 0x100da914 0x0 + 269330708
2017-02-08 15:22:39.997 WorkFormGoFelixiOS[5150:4809781] critical: 57 ??? 0x100d8510 0x0 + 269321488
2017-02-08 15:22:39.997 WorkFormGoFelixiOS[5150:4809781] critical: 58 ??? 0x100d8188 0x0 + 269320584
2017-02-08 15:22:39.997 WorkFormGoFelixiOS[5150:4809781] critical: 59 ??? 0x100d838f 0x0 + 269321103
2017-02-08 15:22:39.998 WorkFormGoFelixiOS[5150:4809781] critical: 60 WorkFormGoFelixiOS 0x001122f2 mono_jit_runtime_invoke + 1458
2017-02-08 15:22:39.998 WorkFormGoFelixiOS[5150:4809781] critical: 61 WorkFormGoFelixiOS 0x001d2e4d do_runtime_invoke + 93
2017-02-08 15:22:39.998 WorkFormGoFelixiOS[5150:4809781] critical: 62 WorkFormGoFelixiOS 0x001d51fd mono_runtime_exec_main + 1005
2017-02-08 15:22:39.999 WorkFormGoFelixiOS[5150:4809781] critical: 63 WorkFormGoFelixiOS 0x001d4d3c mono_runtime_run_main + 876
2017-02-08 15:22:39.999 WorkFormGoFelixiOS[5150:4809781] critical: 64 WorkFormGoFelixiOS 0x00098809 mono_jit_exec + 265
2017-02-08 15:22:39.999 WorkFormGoFelixiOS[5150:4809781] critical: 65 WorkFormGoFelixiOS 0x002b00a9 xamarin_main + 3433
2017-02-08 15:22:39.999 WorkFormGoFelixiOS[5150:4809781] critical: 66 WorkFormGoFelixiOS 0x002b18c1 main + 113
2017-02-08 15:22:40.000 WorkFormGoFelixiOS[5150:4809781] critical: 67 libdyld.dylib 0x04b54799 start + 1
2017-02-08 15:22:40.000 WorkFormGoFelixiOS[5150:4809781] critical:
谢谢你们 请发布代码的相关部分。另一种解决问题的方法是在出现异常时中断代码。打开异常设置并将其设置为在异常发生时中断。