我最近发布了对我的某个应用的更新。此更新对数据结构进行了一些小的更改，这对某些人造成了问题。我收到了一些崩溃报告，并将其缩小到有问题的界限，但对于我的生活，我看不出有任何问题。我也无法在我的最后复制这个问题，这没有用。
代码部分是：
-(void)performV160Upgrade {
for(id key in self.consumptionHistory) {
Consumption* consumption = [self.consumptionHistory objectForKey:key];
for(Entry* entry in consumption.entries) {
if(!entry.emotionDescription || [entry.emotionDescription isEqualToString:@""]) {
if(self.emotionDescriptionDefaults && [self.emotionDescriptionDefaults count] >= entry.emotion) {
entry.emotionDescription = [self.emotionDescriptionDefaults objectAtIndex:entry.emotion-1];
}
}
}
}
NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];
[defaults setBool:YES forKey:@"V160Upgrade"];
[defaults synchronize];
[self saveDataFile];
}
具体地说，当分配entry.emotionDescription（这是第251行）时，崩溃发生在最里面的if语句上。对于某些上下文，consumptionHistory是NSMutableDictionary，consume.entries是NSMutableArray，self.emotionDescriptionDefaults是NSString的NSMutableArray，而entry.emotionDescription是NSString。
我会附上下面的崩溃日志。关于从哪里去的任何想法或建议将不胜感激！
Incident Identifier: 3BCAF197-ABEF-40D8-A27E-ECDCEC448513
CrashReporter Key: b7442fed2b23808a458077268ee149054b7dfada
Hardware Model: iPod3,1
Process: MyMoodTrack [52]
Path: /var/mobile/Applications/5F858141-F6ED-45D6-970A-94C39EE1AD4E/MyMoodTrack.app/MyMoodTrack
Identifier: MyMoodTrack
Version: ??? (???)
Code Type: ARM (Native)
Parent Process: launchd [1]
>Date/Time: 2010-08-03 16:53:53.720 -0400
OS Version: iPhone OS 4.0 (8A293)
Report Version: 104
>Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x00000000, 0x00000000
Crashed Thread: 0
>Thread 0 Crashed:
0 libSystem.B.dylib 0x33b621d0 0x33ae9000 + 496080
1 libSystem.B.dylib 0x33b621c0 0x33ae9000 + 496064
2 libSystem.B.dylib 0x33b621b2 0x33ae9000 + 496050
3 libSystem.B.dylib 0x33b766fa 0x33ae9000 + 579322
4 libstdc++.6.dylib 0x3015fa20 0x3011b000 + 281120
5 libobjc.A.dylib 0x3433b9ec 0x34336000 + 23020
6 libstdc++.6.dylib 0x3015ddf2 0x3011b000 + 273906
7 libstdc++.6.dylib 0x3015de46 0x3011b000 + 273990
8 libstdc++.6.dylib 0x3015df16 0x3011b000 + 274198
9 libobjc.A.dylib 0x3433a8cc 0x34336000 + 18636
10 CoreFoundation 0x328ebb72 0x328cc000 + 129906
11 MyMoodTrack 0x000057e0 -[MyMoodTrackerAppDelegate performV160Upgrade] (MyMoodTrackerAppDelegate.m:251)
12 MyMoodTrack 0x000061f6 -[MyMoodTrackerAppDelegate loadDataFile] (MyMoodTrackerAppDelegate.m:168)
13 MyMoodTrack 0x0000444a -[MyMoodTrackerAppDelegate applicationDidFinishLaunching:] (MyMoodTrackerAppDelegate.m:59)
14 UIKit 0x305c6416 0x305b8000 + 58390
15 UIKit 0x307087fc 0x305b8000 + 1378300
16 UIKit 0x30615132 0x305b8000 + 381234
17 UIKit 0x30614a56 0x305b8000 + 379478
18 UIKit 0x30614500 0x305b8000 + 378112
19 GraphicsServices 0x3323a140 0x33236000 + 16704
20 CoreFoundation 0x3293daa4 0x328cc000 + 465572
21 CoreFoundation 0x3293f848 0x328cc000 + 473160
22 CoreFoundation 0x32940626 0x328cc000 + 476710
23 CoreFoundation 0x328e98e4 0x328cc000 + 121060
24 CoreFoundation 0x328e97ec 0x328cc000 + 120812
25 UIKit 0x305be280 0x305b8000 + 25216
26 UIKit 0x305bce10 0x305b8000 + 19984
27 MyMoodTrack 0x0000258c main (main.m:14)
28 MyMoodTrack 0x00002528 start + 44
>Thread 1:
0 libSystem.B.dylib 0x33b16c4c 0x33ae9000 + 187468
1 libSystem.B.dylib 0x33bbfe44 0x33ae9000 + 880196
2 libSystem.B.dylib 0x33bbf894 0x33ae9000 + 878740
3 libSystem.B.dylib 0x33bbfa34 0x33ae9000 + 879156
4 libSystem.B.dylib 0x33b63d82 0x33ae9000 + 503170
5 libSystem.B.dylib 0x33b5cfcc 0x33ae9000 + 475084
>Thread 2:
0 libSystem.B.dylib 0x33b6485c 0x33ae9000 + 505948
1 libSystem.B.dylib 0x33b63e98 0x33ae9000 + 503448
2 libSystem.B.dylib 0x33b5cfcc 0x33ae9000 + 475084
>Thread 3:
0 libSystem.B.dylib 0x33aea658 0x33ae9000 + 5720
1 libSystem.B.dylib 0x33aec724 0x33ae9000 + 14116
2 CoreFoundation 0x3293e2c8 0x328cc000 + 467656
3 CoreFoundation 0x32940582 0x328cc000 + 476546
4 CoreFoundation 0x328e98e4 0x328cc000 + 121060
5 CoreFoundation 0x328e97ec 0x328cc000 + 120812
6 WebCore 0x31912056 0x3190f000 + 12374
7 libSystem.B.dylib 0x33b63986 0x33ae9000 + 502150
8 libSystem.B.dylib 0x33b590e4 0x33ae9000 + 458980
>Thread 4:
0 MyMoodTrack 0x00023bfc -[FlurryConnectionDelegate isDone] (FlurryConnectionDelegate.m:32)
1 MyMoodTrack 0x000235c0 +[FlurryHTTPEater sendMethod:to:body:headerFields:timeoutInterval:useWebView:] (FlurryHTTPEater.m:72)
2 MyMoodTrack 0x00022982 +[FlurrySession sendSessionsToServerWithTimeout:useWebView:requestAds:sendCurrentSession:] (FlurrySession.m:762)
3 MyMoodTrack 0x0001fd7c +[FlurrySession sendSessionsToServerForAppCircle] (FlurrySession.m:739)
4 Foundation 0x31ed2c96 0x31ec7000 + 48278
5 Foundation 0x31f579da 0x31ec7000 + 592346
6 libSystem.B.dylib 0x33b63986 0x33ae9000 + 502150
7 libSystem.B.dylib 0x33b590e4 0x33ae9000 + 458980
>Thread 5:
0 libSystem.B.dylib 0x33aea658 0x33ae9000 + 5720
1 libSystem.B.dylib 0x33aec724 0x33ae9000 + 14116
2 CoreFoundation 0x3293e2c8 0x328cc000 + 467656
3 CoreFoundation 0x32940582 0x328cc000 + 476546
4 CoreFoundation 0x328e98e4 0x328cc000 + 121060
5 CoreFoundation 0x328e97ec 0x328cc000 + 120812
6 Foundation 0x31f0271e 0x31ec7000 + 243486
7 Foundation 0x31ed2c96 0x31ec7000 + 48278
8 Foundation 0x31f579da 0x31ec7000 + 592346
9 libSystem.B.dylib 0x33b63986 0x33ae9000 + 502150
10 libSystem.B.dylib 0x33b590e4 0x33ae9000 + 458980
>Thread 0 crashed with ARM Thread State:
r0: 0x00000000 r1: 0x00000000 r2: 0x00000001 r3: 0x3e5bb24c
r4: 0x00000006 r5: 0x00153f6c r6: 0x2fffe028 r7: 0x2fffe038
r8: 0x3e327318 r9: 0x00000065 r10: 0x316c706c r11: 0x3e32fd5c
ip: 0x00000025 sp: 0x2fffe038 lr: 0x33b621c7 pc: 0x33b621d0
cpsr: 0x000f0010
>Binary Images:
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0xf3000 - 0xf4fff dns.so armv7 <240b8d3f07b4fcb234de598f8e67de1a> /usr/lib/info/dns.so
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0x326ba000 - 0x326c9fff MobileDeviceLink armv7 <575a1afc08ed55608075204df14cc5f5> /System/Library/PrivateFrameworks/MobileDeviceLink.framework/MobileDeviceLink
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0x34336000 - 0x343d6fff libobjc.A.dylib armv7 <89553a61e05078fd178ac0ea2081ae40> /usr/lib/libobjc.A.dylib
0x345f1000 - 0x345f9fff MobileBluetooth armv7 <0bd0c65f4350b5d81f81449fae029a04> /System/Library/PrivateFrameworks/MobileBluetooth.framework/MobileBluetooth
0x345fa000 - 0x3460dfff libmis.dylib armv7 <9fbf2930731e2da9863eacdff8b121a2> /usr/lib/libmis.dylib
0x3460e000 - 0x34711fff CoreData armv7 <0abaeddf54d093fa5cf680b0d644d8e9> /System/Library/Frameworks/CoreData.framework/CoreData
0x3474a000 - 0x3482bfff GameKitServices armv7 <5bfca52ad46cbf5f8ea3888f646f3511> /System/Library/PrivateFrameworks/GameKitServices.framework/GameKitServices
0x34831000 - 0x348b8fff Message armv7 <32383927596c6b8c0837a5cd4b2bc0d4> /System/Library/PrivateFrameworks/Message.framework/Message
0x34960000 - 0x34b9efff ProtocolBuffer armv7 <83f1b1c1956ed14bf6f6c7923ee9f2fc> /System/Library/PrivateFrameworks/ProtocolBuffer.framework/ProtocolBuffer
0x34f21000 - 0x34f65fff libsqlite3.dylib armv7 <36b9bc7d02e29c8d321dd0d7bf7e115e> /usr/lib/libsqlite3.dylib
0x34f66000 - 0x34fa5fff libGLImage.dylib armv7 <b96f5e231a3e39677b5e3621d61d2f11> /System/Library/Frameworks/OpenGLES.framework/libGLImage.dylib
0x34fb9000 - 0x350a1fff libGLProgrammability.dylib armv7 <9bcf5fe3e7abc344425e581ff2896579> /System/Library/Frameworks/OpenGLES.framework/libGLProgrammability.dylib
0x350a2000 - 0x351c0fff CoreGraphics armv7 <4022bbf12f11dd1f6b75662c764e7f7c> /System/Library/Frameworks/CoreGraphics.framework/CoreGraphics
0x351c6000 - 0x351f5fff QuickLook armv7 <78442b5e66e7845f89afcc02b6982ef2> /System/Library/Frameworks/QuickLook.framework/QuickLook
0x3522e000 - 0x35244fff EAP8021X armv7 <4177ec92cd0e2a4a23c79fac68de5c2e> /System/Library/PrivateFrameworks/EAP8021X.framework/EAP8021X
0x352bd000 - 0x352f3fff Security armv7 <7cea1027f1a381b8d6c5ffae4dae0d22> /System/Library/Frameworks/Security.framework/Security
答案 0 :(得分：0)
我不确定entry.emotion是什么，但我假设它是一个整数（因为你将它用作索引，并从中减去一个）？如果是这样，您可能通过尝试访问数组中不存在的索引（例如-1）来导致索引超出范围错误