我正在使用 xamarin.iso 独立版和 xamarin studio 来开发一个小型应用程序。一开始，一切都很顺利，但是在我添加了涉及 UISearchDisplayController 和 UISearchDisplayDelegate 的搜索功能后，我总是让应用程序崩溃。每次，如果我第一次搜索，它就会起作用，并且控制器将导航回主控制器，但是当我再次进入搜索控制器时，当我单击将触发的按钮时应用程序将崩溃导航到搜索控制器或当我在搜索栏上输入搜索文本时。调试器不会弹出任何异常或消息，只是与 iPad 断开连接。所以我不知道我的代码有什么问题。
我在这段代码上花了大约一周的时间，并更改了任何可能有错误的代码，并将所有 try/catch 添加到所有相关的函数中，但是当应用程序崩溃时，它们都没有中断。
我该怎么做才能得到真正发生的事情？
谢谢
我添加了崩溃报告：Incident Identifier: 4E7BF3F6-6C51-4F31-9FCA-BFBBFF4BA784 CrashReporter Key: d9f9b03f7f2af1d1b10851aec8a44d4127285508 Hardware Model: iPad3,4 Process: MODClientiOSModPad [300] Path: /var/mobile/Applications/2F85E9984 -439FEEC7CF07/MODClientiOSModPad.app/MODClientiOSModPad 标识符：MODClientiOSModPad 版本：??? (???) 代码类型：ARM（本机）父进程：launchd [1]
Date/Time: 2013-06-03 23:09:16.965 +0800
OS Version: iOS 6.1.3 (10B329)
Report Version: 104
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Crashed Thread: 0
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0 libsystem_kernel.dylib 0x39aac350 __pthread_kill + 8
1 libsystem_c.dylib 0x39a22fb2 pthread_kill + 54
2 libsystem_c.dylib 0x39a5f366 abort + 90
3 MODClientiOSModPad 0x001b3796 0x1000 + 1779606
4 MODClientiOSModPad 0x001ba5b4 0x1000 + 1807796
5 libsystem_c.dylib 0x39a2cd38 _sigtramp + 40
6 libsystem_c.dylib 0x39a22fb2 pthread_kill + 54
7 libsystem_c.dylib 0x39a5f366 abort + 90
8 MODClientiOSModPad 0x00196866 0x1000 + 1661030
9 MODClientiOSModPad 0x001d98e2 0x1000 + 1935586
10 MODClientiOSModPad 0x001e0cfe 0x1000 + 1965310
11 MODClientiOSModPad 0x001e0e1a 0x1000 + 1965594
12 MODClientiOSModPad 0x00205064 0x1000 + 2113636
13 MODClientiOSModPad 0x00200b64 0x1000 + 2095972
14 MODClientiOSModPad 0x00002024 0x1000 + 4132
Thread 1 name: Dispatch queue: com.apple.libdispatch-manager
Thread 1:
0 libsystem_kernel.dylib 0x39a9c5d0 kevent64 + 24
1 libdispatch.dylib 0x399d7d22 _dispatch_mgr_invoke + 806
2 libdispatch.dylib 0x399d3374 _dispatch_mgr_thread + 32
Thread 2:
0 libsystem_kernel.dylib 0x39aacd98 __workq_kernreturn + 8
1 libsystem_c.dylib 0x399faad6 _pthread_workq_return + 14
2 libsystem_c.dylib 0x399fa7f2 _pthread_wqthread + 362
3 libsystem_c.dylib 0x399fa680 start_wqthread + 4
Thread 3:
0 libsystem_kernel.dylib 0x39aac494 __recvfrom + 20
1 libsystem_c.dylib 0x39a05192 recv + 18
2 MODClientiOSModPad 0x00201f50 0x1000 + 2101072
3 MODClientiOSModPad 0x002035a4 0x1000 + 2106788
4 MODClientiOSModPad 0x00203260 0x1000 + 2105952
5 MODClientiOSModPad 0x00201d3c 0x1000 + 2100540
6 MODClientiOSModPad 0x00200d9c 0x1000 + 2096540
7 Foundation 0x3204622c __NSThread__main__ + 968
8 libsystem_c.dylib 0x39a050de _pthread_start + 306
9 libsystem_c.dylib 0x39a04fa4 thread_start + 4
Thread 4:
0 libsystem_kernel.dylib 0x39aacd98 __workq_kernreturn + 8
1 libsystem_c.dylib 0x399faad6 _pthread_workq_return + 14
2 libsystem_c.dylib 0x399fa7f2 _pthread_wqthread + 362
3 libsystem_c.dylib 0x399fa680 start_wqthread + 4
Thread 5:
0 libsystem_kernel.dylib 0x39aac494 __recvfrom + 20
1 libsystem_c.dylib 0x39a05192 recv + 18
2 MODClientiOSModPad 0x00201f50 0x1000 + 2101072
3 MODClientiOSModPad 0x00202054 0x1000 + 2101332
4 MODClientiOSModPad 0x0017e166 0x1000 + 1560934
5 MODClientiOSModPad 0x0016d136 0x1000 + 1491254
6 MODClientiOSModPad 0x0018f148 0x1000 + 1630536
7 MODClientiOSModPad 0x001b0628 0x1000 + 1766952
8 libsystem_c.dylib 0x39a050de _pthread_start + 306
9 libsystem_c.dylib 0x39a04fa4 thread_start + 4
Thread 0 crashed with ARM Thread State (32-bit):
r0: 0x00000000 r1: 0x00000000 r2: 0x00000000 r3: 0x3b599524
r4: 0x00000006 r5: 0x3b599b78 r6: 0x0021b34b r7: 0x2fdff374
r8: 0x0021af65 r9: 0x00000000 r10: 0x0021b398 r11: 0x011e5e30
ip: 0x00000148 sp: 0x2fdff368 lr: 0x39a22fb7 pc: 0x39aac350
cpsr: 0x00000010
Binary Images:
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0x32ba5000 - 0x32ba9fff libGFXShared.dylib armv7s <272a9de67f6632c3aebbe2407cfe716b> /System/Library/Frameworks/OpenGLES.framework/libGFXShared.dylib
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0x334f8000 - 0x33537fff SystemConfiguration armv7s <0fb8d4a2fa8f30ce837e068a046e466b> /System/Library/Frameworks/SystemConfiguration.framework/SystemConfiguration
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0x34274000 - 0x3427dfff AssetsLibraryServices armv7s <ec78d21573a23c34b6cec05ba56928f1> /System/Library/PrivateFrameworks/AssetsLibraryServices.framework/AssetsLibraryServices
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0x34b19000 - 0x34f2cfff FaceCoreLight armv7s <432cbaeb84743441b9286532bc36c96d> /System/Library/PrivateFrameworks/FaceCoreLight.framework/FaceCoreLight
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0x35575000 - 0x35576fff IOAccelerator armv7s <832913083f7f347fba1340263ff13b52> /System/Library/PrivateFrameworks/IOAccelerator.framework/IOAccelerator
0x35577000 - 0x3557cfff IOMobileFramebuffer armv7s <828a36a2325738bb8f2d4b97730d253a> /System/Library/PrivateFrameworks/IOMobileFramebuffer.framework/IOMobileFramebuffer
0x3557d000 - 0x35581fff IOSurface armv7s <9925fbc4a08d3a17b72ac807cbbba8ba> /System/Library/PrivateFrameworks/IOSurface.framework/IOSurface
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0x35a6d000 - 0x35a9afff MobileAsset armv7s <e3217ead58d5390395de360b3ca3a10a> /System/Library/PrivateFrameworks/MobileAsset.framework/MobileAsset
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0x36c3c000 - 0x36c4dfff SpringBoardServices armv7s <bb92c069669b36959d3e82d4144f4264> /System/Library/PrivateFrameworks/SpringBoardServices.framework/SpringBoardServices
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0x39acf000 - 0x39addfff libsystem_network.dylib armv7s <137f48e279a83d7496659c8e3d3729d4> /usr/lib/system/libsystem_network.dylib
0x39ade000 - 0x39ae5fff libsystem_notify.dylib armv7s <df14146497cb3fa0a002eedbed49da65> /usr/lib/system/libsystem_notify.dylib
0x39ae6000 - 0x39ae7fff libsystem_sandbox.dylib armv7s <85e91e99abc03db88eddc665424090b4> /usr/lib/system/libsystem_sandbox.dylib
0x39ae8000 - 0x39ae8fff libunwind.dylib armv7s <3b7ec561dbec3a199f09ea08a64e76ee> /usr/lib/system/libunwind.dylib
0x39ae9000 - 0x39afefff libxpc.dylib armv7s <0562a59bdf8d3f7783e93f35d7e724a8> /usr/lib/system/libxpc.dylib