Xamarin Forms iOS 应用程序在启动时崩溃答案

【问题标题】：Xaramin Forms iOS application crashes at startupXamarin Forms iOS 应用程序在启动时崩溃
【发布时间】：2020-04-08 15:53:31
【问题描述】：

我这几天一直在和一个虫子作斗争。我一直在到处寻找解决方案。我已经完成了我能做的事情。

基本上，我的 iOS 应用程序在启动时崩溃。我收到带有错误的 SIGABT 故障代码：FIXME: ftnptr_arg page trampolines。我将在下面附上崩溃报告的副本。我在这个网站上发现了一些与我的问题有点相似的帖子：

Got a SIGABRT while executing native code xamarin.ios

SIGABRT error after last Xamarin.iOS update

Xamarin IOS app crashes with exception: EXC_BAD_ACCESS (SIGABRT)

在 GitHub 上： https://github.com/mono/mono/issues/9871

我已经尝试过这些解决方案，但它们对我不起作用。我还想补充一点，我正在使用设备上的蓝牙。我确实在 Info.plist 文件中添加了正确的权限。我使用的蓝牙库是Plugin.BLE：https://github.com/xabre/xamarin-bluetooth-le

无论如何，崩溃发生在无法访问蓝牙设备的页面上。它发生在登录页面（这是显示给用户的第一页）。我不认为这个问题与蓝牙有关。就像我之前说的，我几乎已经完成了我能做的事情。不知道发生了什么。有没有其他人遇到过这个问题？

补充说明：

我还想补充一点，我能够调试表单的初始化并单步执行代码而不会崩溃。我只有3个功能。一个用于初始化，另一个用于窗体出现时，第三个用于按下按钮时。我可以单步执行前 2 个函数的代码。程序执行这两个后，应用程序崩溃。我知道这不是我的代码的问题，因为相同的代码在 Android 上运行良好。

另外，我会创建一个极简代码来发布，但是，该应用程序包含许多图片和图形，我认为这些图片和图形太大而无法在此处发布。而且我认为这个问题与我编写的代码无关。如上所述，代码在 Android 上运行良好。

崩溃调试报告：

[HotReload] (2020-04-08 15:31:50.1): WARN: (PQEApplicationv3.iOS) Hot Reload disabled due to invalid linker settings
Loaded assembly: /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/Mono.Security.dll [External]
Loaded assembly: /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/System.Core.dll [External]
Loaded assembly: /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/System.Numerics.dll [External]
Loaded assembly: /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/System.dll [External]
Loaded assembly: /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/System.Drawing.Common.dll [External]
Loaded assembly: /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/.monotouch-32/Xamarin.iOS.dll [External]
Loaded assembly: /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/System.Net.Http.dll [External]
Loaded assembly: /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/System.Xml.dll [External]
Loaded assembly: /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/Xamarin.Forms.Platform.dll [External]
Loaded assembly: /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/Xamarin.Forms.Core.dll [External]
Loaded assembly: /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/System.ServiceModel.Internals.dll [External]
Loaded assembly: /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/System.Runtime.Serialization.dll [External]
Loaded assembly: /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/Xamarin.Forms.Platform.iOS.dll [External]
Thread started:  #2
Loaded assembly: /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/Xamarin.Essentials.dll [External]
Loaded assembly: /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/Plugin.BLE.Abstractions.dll [External]
Loaded assembly: /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/Plugin.BLE.dll [External]
Loaded assembly: /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/Xamarin.Forms.Xaml.dll [External]
Loaded assembly: /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/PQEApplicationv3.dll
Loaded assembly: /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/PQEApplicationv3.iOS.exe
2020-04-08 11:31:53.660 PQEApplicationv3.iOS[403:658622] error: FIXME: ftnptr_arg page trampolines

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

=================================================================
    Native stacktrace:
=================================================================
    0x3ff556b - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libmonosgen-2.0.dylib : mono_dump_native_crash_info
    0x3fed549 - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libmonosgen-2.0.dylib : mono_handle_native_crash
    0x3ff4c2f - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libmonosgen-2.0.dylib : sigabrt_signal_handler
    0x1d8c0259 - /usr/lib/system/libsystem_platform.dylib : _sigtramp
    0x1d8c6087 - /usr/lib/system/libsystem_pthread.dylib : pthread_kill
    0x1d7a295b - /usr/lib/system/libsystem_c.dylib : abort
    0x4357d4c - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libxamarin-debug.dylib : _ZL12log_callbackPKcS0_S0_iPv
    0x4123ca1 - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libmonosgen-2.0.dylib : eglib_log_adapter
    0x3fcbfb7 - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libmonosgen-2.0.dylib : monoeg_g_logv_nofree
    0x3fcbff5 - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libmonosgen-2.0.dylib : monoeg_g_log
    0x3fd98cb - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libmonosgen-2.0.dylib : mono_aot_get_ftnptr_arg_trampoline
    0xdc74f - /var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/PQEApplicationv3.iOS : (null)
    0x3ff7957 - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libmonosgen-2.0.dylib : mono_jit_compile_method_with_opt
    0x3ffea7b - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libmonosgen-2.0.dylib : mono_delegate_trampoline
    0x72d494 - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libmscorlib.dll.dylib : generic_trampoline_delegate
    0x6bc6a0 - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libmscorlib.dll.dylib : wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr
    0x3ffc1ad - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libmonosgen-2.0.dylib : mono_jit_runtime_invoke
    0x408f937 - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libmonosgen-2.0.dylib : mono_runtime_invoke_checked
    0x40924cb - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libmonosgen-2.0.dylib : mono_runtime_invoke
    0xbc649 - /var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/PQEApplicationv3.iOS : (null)
    0xbd241 - /var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/PQEApplicationv3.iOS : (null)
    0x1e985b2f - /System/Library/Frameworks/Foundation.framework/Foundation : <redacted>
    0x1dffbfdd - /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation : <redacted>
    0x1dffbaa5 - /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation : <redacted>
    0x1dff9f51 - /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation : <redacted>
    0x1df4d1af - /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation : CFRunLoopRunSpecific
    0x1df4cfd1 - /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation : CFRunLoopRunInMode
    0x1f6f7b41 - /System/Library/PrivateFrameworks/GraphicsServices.framework/GraphicsServices : GSEventRunModal
    0x232d5a53 - /System/Library/Frameworks/UIKit.framework/UIKit : UIApplicationMain
    0xf57924 - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libXamarin.iOS.dll.dylib : wrapper_managed_to_native_UIKit_UIApplication_UIApplicationMain_int_string___intptr_intptr
    0xea7358 - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libXamarin.iOS.dll.dylib : UIKit_UIApplication_Main_string___intptr_intptr
    0xea72dc - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libXamarin.iOS.dll.dylib : UIKit_UIApplication_Main_string___string_string
    0x16a9c8 - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libPQEApplicationv3.iOS.exe.dylib : PQEApplicationv3_iOS_Application_Main_string__
    0x6bc6a0 - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libmscorlib.dll.dylib : wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr
    0x3ffc1ad - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libmonosgen-2.0.dylib : mono_jit_runtime_invoke
    0x408f937 - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libmonosgen-2.0.dylib : mono_runtime_invoke_checked
The app has been terminated.
    0x409447d - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libmonosgen-2.0.dylib : mono_runtime_exec_main_checked
The app has been terminated.
    0x3fdeecb - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libmonosgen-2.0.dylib : mono_jit_exec
    0x436dd24 - /private/var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/libxamarin-debug.dylib : xamarin_main
    0xdbe95 - /var/containers/Bundle/Application/4F25BE08-0DD1-4153-BAB0-DD4EAD436163/PQEApplicationv3.iOS.app/PQEApplicationv3.iOS : (null)
    0x1d73a4eb - /usr/lib/system/libdyld.dylib : <redacted>

=================================================================
    Basic Fault Address Reporting
=================================================================
Memory around native instruction pointer (0x1d80dacc):
0x1d80dabc  1c ff 2f 
e1 1e ff 2f e1 52 cf 
a0 e3 80 
00 00 ef  .
./...
/.R.......
0x1d80dacc  04 00 00 3a 04 c0 9f e5 0c c0 9f e7 00 00 00 ea  ...:.......
....
.
0x1d80dadc  4c 
05 70 1a 1c ff 2f e1 1e ff 
2f e1 53 cf a0 
e3  L.p.../.../
.S...
0x1d80daec  80 00 00 ef 04 00 00 3a 04 
c0 9f 
e5 0c c0 9f e7  
......
.:......
..

=================================================================
    Managed Stacktrace:
=================================================================
      at <unknown> <0xffffffff>
      at Foundation.NSAsyncActionDispatcher:Apply <0x0002f>
      at System.Object:runtime_invoke_dynamic <0x000fb>
      at <unknown> <0xffffffff>
      at UIKit.UIApplication:UIApplicationMain <0x0004f>
      at UIKit.UIApplication:Main <0x00033>
      at UIKit.UIApplication:Main <0x00057>
      at PQEApplicationv3.iOS.Application:Main <0x00097>
      at System.Object:runtime_invoke_dynamic <0x000fb>
=================================================================

编辑：

我应该注意，这个应用程序是个人项目，与应用商店中的任何应用程序无关

【问题讨论】：

如果崩溃发生在特定页面上，那么说“在启动时”是不准确的。您在该页面中有任何异常处理吗？像 appcenter.ms 这样的崩溃报告工具呢？您使用的是所有工具和库的最新版本吗？
您好杰森，感谢您的反馈。是的，我使用的是最新版本的 Xamarin sdk 和 Visual Studio。由于页面的简单性，我没有任何异常处理。我逐步浏览了页面上的代码，没有出现任何错误。它在页面加载后不久发生。
我强烈建议您使用崩溃报告工具。它是否总是在不同的设备和模拟器上导致相同的崩溃？
好吧，我下载一个crash报告工具，这样分析。稍后会发布更新。该代码适用于 iOS 10 或更高版本。我有一部正在测试的 iPhone 5。至于模拟器，我得到的只是黑屏
不，我的意思是像 appcenter.ms 这样的工具。如果您根本无法让它在模拟器上工作，那将是出现问题的迹象。您在 appdelegate 或 app.xaml.cs 中是否有任何可能存在问题的代码？

标签： xamarin mobile xamarin.ios crash

【解决方案1】：

好的，所以现在我用来解决这个问题的答案是我换了 iPhone。我在 iPhone 5C 上运行。现在正在做 iPhone SE（不是 2020 型号）。

现在，这就是答案。但是，我将保留这个问题，因为我想知道为什么代码没有在 iPhone 5C 上执行。

【讨论】：