我在我们的应用程序中使用 CoreData 有一段时间了，到目前为止一直很好，直到我将我们的最新版本分发给其他团队成员，其中一位成员无法在她的手机上加载该应用程序 (4s) ，它刚刚坠毁。我追查了一下，发现在ManagedObjectContext上调用save()有问题，到现在也不知道是什么原因；需要明确的是，当我直接在任何设备上构建时它都能完美运行，但是 4s 和 5(在 5s 上工作)在临时安装时都会崩溃。
所有经过测试的设备一开始都没有安装应用程序，因此这似乎不是迁移问题(我设置了一个轻量级迁移以防万一)。
这是崩溃日志，任何帮助都会很棒。
Incident Identifier: 3E7C526F-7210-4F88-B298-C83D665C066B
CrashReporter Key: 78c1b7a7751600091f9b4b7909eec333e0f5779a
Hardware Model: iPhone5,2
Process: APP [401]
Path: /private/var/containers/Bundle/Application/004CE56E-AFF8-4BF0-8861-E7617F4635B6/APP.app/APP
Identifier: com.app.APP
Version: 1.7 (1.8)
Code Type: ARM (Native)
Role: Foreground
Parent Process: launchd [1]
Coalition: com.app. [551]
Date/Time: 2016-12-02 17:27:32.1384 +0000
Launch Time: 2016-12-02 17:27:28.0000 +0000
OS Version: iPhone OS 10.1.1 (14B100)
Report Version: 104
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_PROTECTION_FAILURE at 0x006e6000
Triggered by Thread: 0
Filtered syslog:
None found
Thread 0 name: Dispatch queue: SQLQueue 0x1466e820 for APP.sqlite
Thread 0 Crashed:
0 libsystem_platform.dylib 0x1b0b01ba 0x1b0af000 + 4538
1 libswiftCore.dylib 0x0109d3c4 0xf36000 + 1471428
2 libswiftCore.dylib 0x0105ea58 0xf36000 + 1215064
3 libswiftCore.dylib 0x00fbd67c 0xf36000 + 554620
4 libswiftCore.dylib 0x00fcc3bc 0xf36000 + 615356
5 libswiftCore.dylib 0x00fcc208 0xf36000 + 614920
6 libswiftCore.dylib 0x00fcd540 0xf36000 + 619840
7 CoreFoundation 0x1b7a888e 0x1b759000 + 325774
8 Foundation 0x1c0efee2 0x1c08b000 + 413410
9 Foundation 0x1c0ef0b0 0x1c08b000 + 409776
10 Foundation 0x1c0f029c 0x1c08b000 + 414364
11 Foundation 0x1c0ef0b0 0x1c08b000 + 409776
12 Foundation 0x1c0f54ee 0x1c08b000 + 435438
13 CoreData 0x1d7b7bfe 0x1d7a2000 + 89086
14 CoreData 0x1d7edaa4 0x1d7a2000 + 309924
15 CoreData 0x1d983498 0x1d7a2000 + 1971352
16 CoreData 0x1d984d46 0x1d7a2000 + 1977670
17 CoreData 0x1d979c34 0x1d7a2000 + 1932340
18 CoreData 0x1d886984 0x1d7a2000 + 936324
19 libdispatch.dylib 0x1af01082 0x1af00000 + 4226
20 libdispatch.dylib 0x1af0d3a2 0x1af00000 + 54178
21 CoreData 0x1d8867bc 0x1d7a2000 + 935868
22 CoreData 0x1d9545aa 0x1d7a2000 + 1779114
23 CoreData 0x1d8b6fbe 0x1d7a2000 + 1134526
24 CoreData 0x1d8b0a5a 0x1d7a2000 + 1108570
25 CoreData 0x1d7be12c 0x1d7a2000 + 114988
26 CoreData 0x1d89334e 0x1d7a2000 + 987982
27 CoreData 0x1d88b806 0x1d7a2000 + 956422
28 CoreData 0x1d7bdc4e 0x1d7a2000 + 113742
29 CoreData 0x1d7dd3f8 0x1d7a2000 + 242680
30 APP 0x000bdbbc 0x70000 + 318396
31 APP 0x000bee4c 0x70000 + 323148
32 APP 0x000bea9c 0x70000 + 322204
33 APP 0x00146c90 0x70000 + 879760
34 APP 0x001458dc 0x70000 + 874716
35 APP 0x00146bb0 0x70000 + 879536
36 libdispatch.dylib 0x1af01096 0x1af00000 + 4246
37 libdispatch.dylib 0x1af01082 0x1af00000 + 4226
38 libdispatch.dylib 0x1af055fc 0x1af00000 + 22012
39 CoreFoundation 0x1b816a16 0x1b759000 + 776726
40 CoreFoundation 0x1b814cfe 0x1b759000 + 769278
41 CoreFoundation 0x1b764072 0x1b759000 + 45170
42 CoreFoundation 0x1b763e80 0x1b759000 + 44672
43 GraphicsServices 0x1cf10bfc 0x1cf07000 + 39932
44 UIKit 0x2091e82e 0x208a4000 + 501806
45 UIKit 0x20918f60 0x208a4000 + 479072
46 APP 0x00095388 0x70000 + 152456
47 libdyld.dylib 0x1af2e50a 0x1af2b000 + 13578
Thread 1:
0 libsystem_pthread.dylib 0x1b0b6484 0x1b0b5000 + 5252
Thread 2:
0 libsystem_pthread.dylib 0x1b0b6484 0x1b0b5000 + 5252
Thread 3:
0 libsystem_pthread.dylib 0x1b0b6484 0x1b0b5000 + 5252
Thread 4:
0 libsystem_kernel.dylib 0x1b004744 0x1afed000 + 96068
1 libsystem_pthread.dylib 0x1b0b69a0 0x1b0b5000 + 6560
2 libsystem_pthread.dylib 0x1b0b648c 0x1b0b5000 + 5260
Thread 5 name: com.apple.uikit.eventfetch-thread
Thread 5:
0 libsystem_kernel.dylib 0x1afee83c 0x1afed000 + 6204
1 libsystem_kernel.dylib 0x1afee62e 0x1afed000 + 5678
2 CoreFoundation 0x1b816868 0x1b759000 + 776296
3 CoreFoundation 0x1b814b66 0x1b759000 + 768870
4 CoreFoundation 0x1b764072 0x1b759000 + 45170
5 CoreFoundation 0x1b763e80 0x1b759000 + 44672
6 Foundation 0x1c0960da 0x1c08b000 + 45274
7 Foundation 0x1c0b4df0 0x1c08b000 + 171504
8 UIKit 0x21226cb2 0x208a4000 + 9972914
9 Foundation 0x1c17f0d0 0x1c08b000 + 999632
10 libsystem_pthread.dylib 0x1b0b8a16 0x1b0b5000 + 14870
11 libsystem_pthread.dylib 0x1b0b893c 0x1b0b5000 + 14652
12 libsystem_pthread.dylib 0x1b0b6498 0x1b0b5000 + 5272
Thread 6 name: com.apple.NSURLConnectionLoader
Thread 6:
0 libsystem_kernel.dylib 0x1afee83c 0x1afed000 + 6204
1 libsystem_kernel.dylib 0x1afee62e 0x1afed000 + 5678
2 CoreFoundation 0x1b816868 0x1b759000 + 776296
3 CoreFoundation 0x1b814b66 0x1b759000 + 768870
4 CoreFoundation 0x1b764072 0x1b759000 + 45170
5 CoreFoundation 0x1b763e80 0x1b759000 + 44672
6 CFNetwork 0x1be2edb8 0x1bd83000 + 703928
7 Foundation 0x1c17f0d0 0x1c08b000 + 999632
8 libsystem_pthread.dylib 0x1b0b8a16 0x1b0b5000 + 14870
9 libsystem_pthread.dylib 0x1b0b893c 0x1b0b5000 + 14652
10 libsystem_pthread.dylib 0x1b0b6498 0x1b0b5000 + 5272
Thread 7 name: com.twitter.crashlytics.ios.MachExceptionServer
Thread 7:
0 libsystem_kernel.dylib 0x1afee83c 0x1afed000 + 6204
1 libsystem_kernel.dylib 0x1afee62e 0x1afed000 + 5678
2 APP 0x00408b9a 0x70000 + 3771290
3 libsystem_pthread.dylib 0x1b0b8a16 0x1b0b5000 + 14870
4 libsystem_pthread.dylib 0x1b0b893c 0x1b0b5000 + 14652
5 libsystem_pthread.dylib 0x1b0b6498 0x1b0b5000 + 5272
Thread 8:
0 libsystem_kernel.dylib 0x1b004744 0x1afed000 + 96068
1 libsystem_pthread.dylib 0x1b0b69a0 0x1b0b5000 + 6560
2 libsystem_pthread.dylib 0x1b0b648c 0x1b0b5000 + 5260
Thread 9:
0 libsystem_kernel.dylib 0x1b004744 0x1afed000 + 96068
1 libsystem_pthread.dylib 0x1b0b69a0 0x1b0b5000 + 6560
2 libsystem_pthread.dylib 0x1b0b648c 0x1b0b5000 + 5260
Thread 10 name: Dispatch queue: com.apple.network.connections
Thread 10:
0 libcorecrypto.dylib 0x1aecdbe8 0x1aea7000 + 158696
1 libsystem_coretls.dylib 0x1afc7622 0x1afb9000 + 58914
2 libsystem_coretls.dylib 0x1afc5a14 0x1afb9000 + 51732
3 libsystem_coretls.dylib 0x1afc619a 0x1afb9000 + 53658
4 libnetwork.dylib 0x26824048 0x267dd000 + 290888
5 libnetwork.dylib 0x26826138 0x267dd000 + 299320
6 libnetwork.dylib 0x26802992 0x267dd000 + 154002
7 libdispatch.dylib 0x1af0cb9a 0x1af00000 + 52122
8 libdispatch.dylib 0x1af17a84 0x1af00000 + 96900
9 libdispatch.dylib 0x1af02cb4 0x1af00000 + 11444
10 libdispatch.dylib 0x1af0dd2c 0x1af00000 + 56620
11 libdispatch.dylib 0x1af04378 0x1af00000 + 17272
12 libdispatch.dylib 0x1af0eb9c 0x1af00000 + 60316
13 libdispatch.dylib 0x1af1488e 0x1af00000 + 84110
14 libsystem_pthread.dylib 0x1b0b67f0 0x1b0b5000 + 6128
15 libsystem_pthread.dylib 0x1b0b648c 0x1b0b5000 + 5260
Thread 11:
0 libsystem_pthread.dylib 0x1b0b6484 0x1b0b5000 + 5252
Thread 12:
0 libsystem_kernel.dylib 0x1b004744 0x1afed000 + 96068
1 libsystem_pthread.dylib 0x1b0b69a0 0x1b0b5000 + 6560
2 libsystem_pthread.dylib 0x1b0b648c 0x1b0b5000 + 5260
Thread 0 crashed with ARM Thread State (32-bit):
r0: 0x006e6000 r1: 0x006e6000 r2: 0x0029267c r3: 0x00000000
r4: 0x00000000 r5: 0x00000000 r6: 0x14586ae0 r7: 0x007e3350
r8: 0x007e33c8 r9: 0x004bc340 r10: 0x007e33d4 r11: 0x0118efdc
ip: 0x00000000 sp: 0x007e3350 lr: 0x0109d3c4 pc: 0x1b0b01ba
cpsr: 0x20000030
最佳答案
那个崩溃日志中没有太多有用的细节。然而，鉴于这只是旧设备上的问题，我将调查两个方面。您需要一台遭受此次崩溃的测试设备。
内存。较旧的设备较少，如果您积累了大量未保存的更改，您可能会用完。具有更多内存的设备不太可能出现问题。您可以使用 Xcode 的内存监控快速检查这一点——如果您在保存时看到内存峰值，您就知道您需要通过 Instruments 更仔细地查看。
速度，如果您在主线程上节省时间。如果你阻塞主线程的时间太长，iOS 可能会认为你的应用程序已经停止响应并杀死它。同样，较慢的设备可能有问题，而较新的设备则正常。请记住，通过 Xcode 调试时可能不会发生这种崩溃，因为它会影响 iOS 决定终止应用程序的时间。
这些中的每一个都可能伴随设备控制台中的有用消息，这些消息可能只是告诉您问题出在哪里。您可以使用 Xcode 或使用 free iOS Console app 来获取它们.
关于ios - 仅适用于特别构建和较旧的设备，保存时核心数据崩溃，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40938040/