我遇到了一个iPhone应用程序的问题，该应用程序在少数几个用户的启动时崩溃。大多数用户都很好 - 应用程序存在于应用程序商店，Apple没有发现任何问题，我在测试时从未发现过这些问题。但是，它们存在。
因此。这就是我所知道的。我相信iPod touch用户会发生崩溃。从我从一个用户那里获得的崩溃日志中，我知道了异常代码：
Exception Codes: 0x00000000, 0x00000000
我认为我的应用程序试图写入内存中的nil指针？ （下面主要是完整的崩溃日志）。所以，我对可能发生的事情有一些想法，我希望有人可以提供帮助...我的一些理论如下：我会更喜欢一些想法。问题是，我很难调试，因为我没有在我的任何测试设备（iPhone4，iPhone3G，iPodTouch，iPad）上遇到问题......
Theory1 ）我在viewDidLoad中定义了几个整数，然后在viewWillAppear中使用它们。愚蠢，我知道，但我假设操作的顺序是viewDidLoad，viewWillAppear，然后是viewDidAppear。总是这样吗？我正在从appDelegate加载这个viewController，如果这有帮助...
Theory2 ）我在viewController中创建了一个UIViews数组。这些视图是IBOutlets。目前，我正在viewDidLoad委托方法中创建此数组。这些可能不存在吗？如果我等到viewWill或viewDid出现，那会解决这个问题吗？
Theory3 ）在应用程序中，我有一个自定义委托，它在一个nib文件中声明自己。是否可以在视图控制器准备好之前向它们发送消息？
Theory4 ）它与版本最低iOs部署目标有关。目前，我正在建立4.1，但我的开发目标设置为3.1。我不相信我使用的方法不存在，但这可能是根本吗？
对这些中的任何一个都有信任吗？其他人面临类似的问题？非常感谢您的帮助。这是完整的，或多或少的崩溃报告：
Incident Identifier: 2B873C9A-8B07-43FC-A5E9-E83D53A42B35
CrashReporter Key: 5a39aac7c109610da9b8ed70df794d6feb519f19
Process: ## CENSORED FOR EMBARRASSMENT PROTECTION ##
Path: /var/mobile/Applications/
Identifier: ## CENSORED FOR EMBARRASSMENT PROTECTION ##
Version: ??? (???)
Code Type: ARM (Native)
Parent Process: launchd [1]
Date/Time: 2010-11-12 18:59:04.099 +0000
OS Version: iPhone OS 3.1.3 (7E18)
Report Version: 104
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x00000000, 0x00000000
Crashed Thread: 0
Thread 0 Crashed:
0 libSystem.B.dylib 0x33994b2c 0x33904000 + 592684
1 libSystem.B.dylib 0x33994b1a 0x33904000 + 592666
2 libSystem.B.dylib 0x33994b0e 0x33904000 + 592654
3 libSystem.B.dylib 0x339abe34 0x33904000 + 687668
4 libstdc++.6.dylib 0x30800390 0x3079a000 + 418704
5 libobjc.A.dylib 0x3336e898 0x33366000 + 34968
6 libstdc++.6.dylib 0x307fda84 0x3079a000 + 408196
7 libstdc++.6.dylib 0x307fdafc 0x3079a000 + 408316
8 libstdc++.6.dylib 0x307fdc24 0x3079a000 + 408612
9 libobjc.A.dylib 0x3336ce54 0x33366000 + 28244
10 CoreFoundation 0x338ecbf6 0x33857000 + 613366
11 CoreFoundation 0x33871b12 0x33857000 + 109330
12 CoreFoundation 0x33868838 0x33857000 + 71736
13 UkeBank 0x00003cd2 0x1000 + 11474
14 UIKit 0x3207a8d0 0x31fff000 + 506064
15 UIKit 0x32077a40 0x31fff000 + 494144
16 UIKit 0x320773fc 0x31fff000 + 492540
17 UIKit 0x32076f44 0x31fff000 + 491332
18 UIKit 0x32079824 0x31fff000 + 501796
19 UIKit 0x32077a40 0x31fff000 + 494144
20 UIKit 0x32076f44 0x31fff000 + 491332
21 UIKit 0x32077c90 0x31fff000 + 494736
22 UIKit 0x32077a40 0x31fff000 + 494144
23 UIKit 0x320773fc 0x31fff000 + 492540
24 UIKit 0x32076f44 0x31fff000 + 491332
25 UIKit 0x32074954 0x31fff000 + 481620
26 UIKit 0x32074558 0x31fff000 + 480600
27 UIKit 0x32088304 0x31fff000 + 561924
28 UIKit 0x320880b8 0x31fff000 + 561336
29 UIKit 0x32068750 0x31fff000 + 431952
30 UIKit 0x32087fd8 0x31fff000 + 561112
31 UIKit 0x32087d90 0x31fff000 + 560528
32 UIKit 0x32087c3c 0x31fff000 + 560188
33 UIKit 0x3208763c 0x31fff000 + 558652
34 UIKit 0x320873a8 0x31fff000 + 557992
35 UIKit 0x32087298 0x31fff000 + 557720
36 UIKit 0x3206b86c 0x31fff000 + 444524
37 UIKit 0x320472d0 0x31fff000 + 295632
38 QuartzCore 0x31b651b8 0x31b59000 + 49592
39 QuartzCore 0x31b64ed4 0x31b59000 + 48852
40 QuartzCore 0x31b6483c 0x31b59000 + 47164
41 QuartzCore 0x31b6446c 0x31b59000 + 46188
42 QuartzCore 0x31b64318 0x31b59000 + 45848
43 UIKit 0x32051e94 0x31fff000 + 339604
44 UIKit 0x32003a80 0x31fff000 + 19072
45 UIKit 0x32054df8 0x31fff000 + 351736
46 UIKit 0x32054634 0x31fff000 + 349748
47 UIKit 0x3205408c 0x31fff000 + 348300
48 GraphicsServices 0x3434f7dc 0x3434a000 + 22492
49 CoreFoundation 0x338ae524 0x33857000 + 357668
50 CoreFoundation 0x338adc18 0x33857000 + 355352
51 UIKit 0x32002c00 0x31fff000 + 15360
52 UIKit 0x32001228 0x31fff000 + 8744
53 UkeBank 0x0000213c 0x1000 + 4412
54 UkeBank 0x0000210c 0x1000 + 4364
Thread 1:
0 libSystem.B.dylib 0x33905488 0x33904000 + 5256
1 libSystem.B.dylib 0x33908064 0x33904000 + 16484
2 CoreFoundation 0x338ae002 0x33857000 + 356354
3 CoreFoundation 0x338adc18 0x33857000 + 355352
4 WebCore 0x33ac61d4 0x33a42000 + 541140
5 libSystem.B.dylib 0x3392f780 0x33904000 + 178048
Thread 0 crashed with ARM Thread State:
r0: 0x00000000 r1: 0x00000000 r2: 0x00000001 r3: 0x385333cc
r4: 0x00000006 r5: 0x0012e6ac r6: 0x2fffccfc r7: 0x2fffcd0c
r8: 0x385265c4 r9: 0x0000000a r10: 0x30cb8524 r11: 0x00000000
ip: 0x00000025 sp: 0x2fffcd0c lr: 0x33994b21 pc: 0x33994b2c
cpsr: 0x00070010
Binary Images:
0x1000 - 0x9fff +UkeBank armv6 /var/mobile/Applications/6D5DFEC6-21DF-431C-B2B2-DEACE4366B61/UkeBank.app/UkeBank
0x6a000 - 0x6bfff dns.so armv6 /usr/lib/info/dns.so
0x2fe00000 - 0x2fe26fff dyld armv6 /usr/lib/dyld
0x30092000 - 0x300c6fff Security armv6 /System/Library/Frameworks/Security.framework/Security
0x300ca000 - 0x3021efff AudioToolbox armv6 /System/Library/Frameworks/AudioToolbox.framework/AudioToolbox
0x30343000 - 0x3034cfff SpringBoardServices armv6 /System/Library/PrivateFrameworks/SpringBoardServices.framework/SpringBoardServices
0x30490000 - 0x30591fff libicucore.A.dylib armv6 /usr/lib/libicucore.A.dylib
0x3079a000 - 0x30804fff libstdc++.6.dylib armv6 /usr/lib/libstdc++.6.dylib
0x30805000 - 0x30902fff JavaScriptCore armv6 /System/Library/PrivateFrameworks/JavaScriptCore.framework/JavaScriptCore
0x30f96000 - 0x30f97fff CoreSurface armv6 /System/Library/PrivateFrameworks/CoreSurface.framework/CoreSurface
0x30fba000 - 0x31067fff ImageIO armv6 /System/Library/PrivateFrameworks/ImageIO.framework/ImageIO
0x310b3000 - 0x310bdfff libkxld.dylib armv6 /usr/lib/system/libkxld.dylib
0x310be000 - 0x31278fff CoreGraphics armv6 /System/Library/Frameworks/CoreGraphics.framework/CoreGraphics
0x3138c000 - 0x313aafff AddressBook armv6 /System/Library/Frameworks/AddressBook.framework/AddressBook
0x313e2000 - 0x3143dfff CoreAudio armv6 /System/Library/Frameworks/CoreAudio.framework/CoreAudio
0x31465000 - 0x314a2fff libCGFreetype.A.dylib armv6 /System/Library/Frameworks/CoreGraphics.framework/Resources/libCGFreetype.A.dylib
0x31546000 - 0x315f3fff WebKit armv6 /System/Library/PrivateFrameworks/WebKit.framework/WebKit
0x31600000 - 0x3164dfff IOKit armv6 /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit
0x31767000 - 0x3176dfff liblockdown.dylib armv6 /usr/lib/liblockdown.dylib
0x318f1000 - 0x3195efff CFNetwork armv6 /System/Library/Frameworks/CFNetwork.framework/CFNetwork
0x319c4000 - 0x319fffff CoreTelephony armv6 /System/Library/PrivateFrameworks/CoreTelephony.framework/CoreTelephony
0x31a00000 - 0x31a0afff MobileCoreServices armv6 /System/Library/Frameworks/MobileCoreServices.framework/MobileCoreServices
0x31b59000 - 0x31c03fff QuartzCore armv6 /System/Library/Frameworks/QuartzCore.framework/QuartzCore
0x31c04000 - 0x31c38fff SystemConfiguration armv6 /System/Library/Frameworks/SystemConfiguration.framework/SystemConfiguration
0x31ca1000 - 0x31cdffff CoreText armv6 /System/Library/PrivateFrameworks/CoreText.framework/CoreText
0x31d09000 - 0x31dfffff libxml2.2.dylib armv6 /usr/lib/libxml2.2.dylib
0x31fd7000 - 0x31ffefff AppSupport armv6 /System/Library/PrivateFrameworks/AppSupport.framework/AppSupport
0x31fff000 - 0x32df0fff UIKit armv6 /System/Library/Frameworks/UIKit.framework/UIKit
0x32e05000 - 0x32e5ffff libsqlite3.dylib armv6 /usr/lib/libsqlite3.dylib
0x32e78000 - 0x32f70fff Foundation armv6 /System/Library/Frameworks/Foundation.framework/Foundation
0x32f71000 - 0x32f79fff libgcc_s.1.dylib armv6 /usr/lib/libgcc_s.1.dylib
0x32f7a000 - 0x32f91fff OpenGLES armv6 /System/Library/Frameworks/OpenGLES.framework/OpenGLES
0x33242000 - 0x3324efff CoreVideo armv6 /System/Library/PrivateFrameworks/CoreVideo.framework/CoreVideo
0x3324f000 - 0x3324ffff vecLib armv6 /System/Library/PrivateFrameworks/Accelerate.framework/Frameworks/vecLib.framework/vecLib
0x332b2000 - 0x332c2fff libbsm.0.dylib armv6 /usr/lib/libbsm.0.dylib
0x332e8000 - 0x332e9fff IOMobileFramebuffer armv6 /System/Library/PrivateFrameworks/IOMobileFramebuffer.framework/IOMobileFramebuffer
0x3335f000 - 0x33365fff MBX2D armv6 /System/Library/PrivateFrameworks/MBX2D.framework/MBX2D
0x33366000 - 0x33409fff libobjc.A.dylib armv6 /usr/lib/libobjc.A.dylib
0x3342f000 - 0x33437fff AVFoundation armv6 /System/Library/Frameworks/AVFoundation.framework/AVFoundation
0x33730000 - 0x3373efff libz.1.dylib armv6 /usr/lib/libz.1.dylib
0x337df000 - 0x337fdfff libresolv.9.dylib armv6 /usr/lib/libresolv.9.dylib
0x33856000 - 0x33856fff Accelerate armv6 /System/Library/PrivateFrameworks/Accelerate.framework/Accelerate
0x33857000 - 0x33903fff CoreFoundation armv6 /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation
0x33904000 - 0x33a2afff libSystem.B.dylib armv6 /usr/lib/libSystem.B.dylib
0x33a3d000 - 0x33a41fff IOSurface armv6 /System/Library/PrivateFrameworks/IOSurface.framework/IOSurface
0x33a42000 - 0x34195fff WebCore armv6 /System/Library/PrivateFrameworks/WebCore.framework/WebCore
0x3430f000 - 0x34349fff libvDSP.dylib armv6 /System/Library/PrivateFrameworks/Accelerate.framework/Frameworks/vecLib.framework/libvDSP.dylib
0x3434a000 - 0x34355fff GraphicsServices armv6 /System/Library/PrivateFrameworks/GraphicsServices.framework/GraphicsServices
答案 0 :(得分：2)
之前我遇到过类似的问题，我的解决方案是弱链接libSystem.B.dylib
1。）打开目标的属性（双击左侧“Groups＆amp; Files”窗格中的目标）。
2.）转到常规标签。
3.）找到列出的“libSystem.B.dylib”并将“Required”更改为“Weak”。
如果未列出libSystem.B.dylib，则通过“Existing Frameworks”添加它。
答案 1 :(得分：1)
13 UkeBank 0x00003cd2 0x1000 + 11474
这很可能是出错的地方（假设您的应用程序中存在错误而不是框架）。弄清楚你的代码在那里做了什么（使用调试符号和/或解析器），你将走上一个不仅仅是猜测的理论之路。