ios - 同步 NSUserDefaults 时崩溃

Question

当我尝试保存 NSUserDefaults 时，我的应用程序遇到了随机错误。任何帮助/建议将不胜感激!我四处搜寻但没有找到任何解决方案:|

在保存 NSuserDefaults 之前，我设置了 3 个值:

[[NSUserDefaults standardUserDefaults] setBool:YES forKey:kInitialized];
[[NSUserDefaults standardUserDefaults] setBool:NO forKey:kIsOK];
[[NSUserDefaults standardUserDefaults] setObject:[NSDate date] forKey:kInitDate]; 
[[NSUserDefaults standardUserDefaults] synchronize];

这是崩溃日志:

Thread 11 Crashed:
0   libsystem_kernel.dylib          0x383361f0 __pthread_kill + 8
1   libsystem_pthread.dylib         0x383a0792 pthread_kill + 54
2   libsystem_c.dylib               0x382e7032 __abort + 74
3   libsystem_c.dylib               0x382e6fe4 abort + 84
4   libsystem_malloc.dylib          0x383656f4 szone_error + 312
5   libsystem_malloc.dylib          0x38365974 free_list_checksum_botch + 24
6   libsystem_malloc.dylib          0x3835fe02 small_malloc_from_free_list + 190
7   libsystem_malloc.dylib          0x3835cefa szone_malloc_should_clear + 1394
8   libsystem_malloc.dylib          0x3835c952 malloc_zone_malloc + 70
9   CoreFoundation                  0x2d51026c __CFBasicHashRehash + 324
10  CoreFoundation                  0x2d5116e4 __CFBasicHashAddValue + 96
11  CoreFoundation                  0x2d42bff0 CFBasicHashAddValue + 3308
12  CoreFoundation                  0x2d42c696 CFDictionaryAddValue + 178
13  CoreFoundation                  0x2d440c1c _flattenPlist + 164
14  CoreFoundation                  0x2d440ca2 _flattenPlist + 298
15  CoreFoundation                  0x2d4a48da __CFBinaryPlistWrite + 126
16  CoreFoundation                  0x2d440a48 CFPropertyListWrite + 240
17  CoreFoundation                  0x2d450dd4 CFPropertyListWriteToStream + 140
18  CoreFoundation                  0x2d44ea5c _CFXPreferencesWritePlist + 264
19  CoreFoundation                  0x2d44e94c -[CFXPreferencesPropertyListSourceSynchronizer writePlistToDisk] + 124
20  CoreFoundation                  0x2d44c1aa -[CFXPreferencesPropertyListSourceSynchronizer synchronizeAlreadyFlocked] + 482
21  CoreFoundation                  0x2d44bfc0 -[CFXPreferencesPropertyListSourceSynchronizer synchronize] + 16
22  CoreFoundation                  0x2d45d25e -[CFXPreferencesPropertyListSource synchronize] + 106
23  CoreFoundation                  0x2d45da9a -[CFXPreferencesSearchListSource synchronize] + 70
24  CoreFoundation                  0x2d4eb7ba ___CFXPreferencesAppSynchronize_block_invoke + 26
25  CoreFoundation                  0x2d4ec122 ____CFXPREFS_SYNC_LOCKED_block_invoke + 30
26  libdispatch.dylib               0x3825b81c _dispatch_client_callout + 20
27  libdispatch.dylib               0x382617c6 _dispatch_barrier_sync_f_invoke + 22
28  CoreFoundation                  0x2d4668b8 CFPreferencesAppSynchronize + 260
29  Foundation                      0x2de516ec -[NSUserDefaults(NSUserDefaults) synchronize] + 20

更新:我已将 setValue 替换为 setObject 并继续观察我的应用程序。我会尽快向您报告此更正是否可以。

Answer 1

对于 NSUserDefaults，您应该使用 setObject:forKey:，而不是 setValue:forKey:。这可能是导致崩溃的原因，但即使它没有导致崩溃，您也需要更改它。