xamarin - 在 Xamarin.IOS 中执行 native 代码时收到 SIGSEGV

Question

模拟器和 xamarin 之间的链接在几秒钟后停止(模拟器为白色)，我无法再次按下播放按钮。我为这个 iOS 项目使用 Xamarin.Forms。我已在 Xamarin Studio 和 Visual Studio 的最新版本中尝试过此操作。

native 堆栈跟踪:

2017-09-13 14:22:34.113 NewsTestOne.iOS[25106:19993674] critical:   0   NewsTestOne.iOS                     0x0000000106847184
mono_handle_native_crash + 244
2017-09-13 14:22:34.113 NewsTestOne.iOS[25106:19993674] critical:   1   NewsTestOne.iOS                     0x000000010685320b mono_sigsegv_signal_handler + 171
2017-09-13 14:22:34.114 NewsTestOne.iOS[25106:19993674] critical:   2   libsystem_platform.dylib            0x000000010d451b3a _sigtramp + 26
2017-09-13 14:22:34.114 NewsTestOne.iOS[25106:19993674] critical:   3   ???                                 0x0003f78b358d56aa 0x0 + 1116602201101994
2017-09-13 14:22:34.114 NewsTestOne.iOS[25106:19993674] critical:   4   CFNetwork                           0x000000010bc51e2e _ZN15TCPIOConnection16_startConnectionEv + 530
2017-09-13 14:22:34.114 NewsTestOne.iOS[25106:19993674] critical:   5   CFNetwork                           0x000000010bd8e32a ___ZN4Tube23_onqueue_prepConnectionEU13block_pointerFvvEU13block_pointerFviE_block_invoke.67 + 726
2017-09-13 14:22:34.114 NewsTestOne.iOS[25106:19993674] critical:   6   CFNetwork                           0x000000010bd8e807 ___ZN4Tube23_onqueue_prepConnectionEU13block_pointerFvvEU13block_pointerFviE_block_invoke_2.83 + 21
2017-09-13 14:22:34.115 NewsTestOne.iOS[25106:19993674] critical:   7   libdispatch.dylib                   0x000000010d0ae585 _dispatch_call_block_and_release + 12
2017-09-13 14:22:34.115 NewsTestOne.iOS[25106:19993674] critical:   8   libdispatch.dylib                   0x000000010d0cf792 _dispatch_client_callout + 8
2017-09-13 14:22:34.115 NewsTestOne.iOS[25106:19993674] critical:   9   libdispatch.dylib                   0x000000010d0b5237 _dispatch_queue_serial_drain + 1022
2017-09-13 14:22:34.115 NewsTestOne.iOS[25106:19993674] critical:   10  libdispatch.dylib                   0x000000010d0b598f _dispatch_queue_invoke + 1053
2017-09-13 14:22:34.115 NewsTestOne.iOS[25106:19993674] critical:   11  libdispatch.dylib                   0x000000010d0b7899 _dispatch_root_queue_drain + 813
2017-09-13 14:22:34.116 NewsTestOne.iOS[25106:19993674] critical:   12  libdispatch.dylib                   0x000000010d0b750d _dispatch_worker_thread3 + 113
2017-09-13 14:22:34.116 NewsTestOne.iOS[25106:19993674] critical:   13  libsystem_pthread.dylib             0x000000010d4635a2 _pthread_wqthread + 1299
2017-09-13 14:22:34.116 NewsTestOne.iOS[25106:19993674] critical:   14  libsystem_pthread.dylib             0x000000010d46307d start_wqthread + 13
2017-09-13 14:22:34.116 NewsTestOne.iOS[25106:19993674] critical: 

=================================================================
Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries 
used by your application.
=================================================================

Answer 1

这通常表示您的代码中存在线程错误，我建议您调试所有异步的服务器端调用，可能有很多情况，例如:

• 在后台线程中运行的 Task.Run 方法试图更新 UI 属性。

• 在异步任务中使用的 Custom Renderer 或 Dependency Service。

• 如果您的代码中有定时器，也请查看它们。

使用最新版本的 Xamarin，调试器无法正确调试 native 代码，因此请确保清理解决方案并尝试在真实设备上进行调试。 (有时摆脱断点也有帮助。)