Question

我使用Core Data遇到了这个问题。

CoreData: error: exception during fetchRowForObjectID: -[PharmaceuticalComp initWithCoder:]: unrecognized selector sent to instance 0x9ab1920 with userInfo of (null)
2014-08-18 07:56:55.784 HorizonMemory[1357:60b] CoreData: error: Serious application error.  Exception was caught during Core Data change processing.  This is usually a bug within an observer of NSManagedObjectContextObjectsDidChangeNotification.  -[PharmaceuticalComp initWithCoder:]: unrecognized selector sent to instance 0x9ab1920 with userInfo (null)
2014-08-18 07:56:55.786 HorizonMemory[1357:60b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[PharmaceuticalComp initWithCoder:]: unrecognized selector sent to instance 0x9ab1920'
*** First throw call stack:
(
    0   CoreFoundation                      0x021981e4 __exceptionPreprocess + 180
    1   libobjc.A.dylib                     0x01f178e5 objc_exception_throw + 44
    2   CoreFoundation                      0x02235243 -[NSObject(NSObject) doesNotRecognizeSelector:] + 275
    3   CoreFoundation                      0x0218850b ___forwarding___ + 1019
    4   CoreFoundation                      0x021880ee _CF_forwarding_prep_0 + 14
    5   Foundation                          0x01b2a01a _decodeObjectBinary + 3498
    6   Foundation                          0x01b2b4d7 -[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:] + 2204
    7   Foundation                          0x01b2b746 -[NSArray(NSArray) initWithCoder:] + 255
    8   Foundation                          0x01b2a01a _decodeObjectBinary + 3498
    9   Foundation                          0x01b2b4d7 -[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:] + 2204
    10  Foundation                          0x01b37ff1 -[NSDictionary(NSDictionary) initWithCoder:] + 261
    11  Foundation                          0x01b2a01a _decodeObjectBinary + 3498
    12  Foundation                          0x01b29106 _decodeObject + 340
    13  Foundation                          0x01b28faa -[NSKeyedUnarchiver decodeObjectForKey:] + 181
    14  Foundation                          0x01b9aa86 +[NSKeyedUnarchiver unarchiveObjectWithData:] + 106
    15  Foundation                          0x01b197d5 -[_NSKeyedUnarchiveFromDataTransformer transformedValue:] + 47
    16  CoreData                            0x024205b9 _prepareResultsFromResultSet + 4105
    17  CoreData                            0x0241de33 newFetchedRowsForFetchPlan_MT + 1

PharmaComp是一个NSManaged子类，通过瞬态属性User链接到另一个实体-linkedPharma。用户在只读模式下具有此属性。每次我调用linkedPharma时，它都会启动一个提取请求，为我提供PharmaComp实例。当我尝试删除用户时，我得到了这个例外。奇怪的事实是，LinkedPharma是一个未在模型中列出的属性，因此PharmaComp不应该参与任何类型的操作。另一个事实是它似乎尝试使用NSKeyedUnarchivier，但我不是＆＃39不明白为什么。
NSManagedObjectContextObjectsDidChangeNotification没有听到任何对象。
我不知道它来自哪里。

Answer 1

解决方案非常简单用户还有一个与可转换容器（NSArray）的另一个关系，该容器持有（一个bug）一个PharmaComp实例。

核心数据异常：initWithCoder：]：发送无法识别的选择器

1 个答案: