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我有一個自定義類MyClass,它基本上由幾個NSMutableArrays組成,沒有其他變量。我有一個實體MyEntity,它具有MyClass的ivar。當我嘗試保存實體,我得到這個堆棧轉儲:核心數據錯誤: - [myclass encodeWithCoder:]:發送到實例的無法識別的選擇器
0 CoreFoundation 0x0118ebe9 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x012e35c2 objc_exception_throw + 47
2 CoreFoundation 0x011906fb -[NSObject(NSObject) doesNotRecognizeSelector:] + 187
3 CoreFoundation 0x01100366 ___forwarding___ + 966
4 CoreFoundation 0x010fff22 _CF_forwarding_prep_0 + 50
5 Foundation 0x00091bf6 _encodeObject + 1076
6 Foundation 0x0009d041 +[NSKeyedArchiver archivedDataWithRootObject:] + 206
7 CoreData 0x00eb7255 -[NSSQLiteConnection execute] + 2677
8 CoreData 0x00f0b646 -[NSSQLiteConnection insertRow:] + 262
9 CoreData 0x00f082d4 -[NSSQLConnection performAdapterOperations:] + 180
10 CoreData 0x00f07f7e -[NSSQLCore _performChangesWithAdapterOps:] + 494
11 CoreData 0x00f06a5a -[NSSQLCore performChanges] + 410
12 CoreData 0x00f004a8 -[NSSQLCore saveChanges:] + 216
13 CoreData 0x00ebe739 -[NSSQLCore executeRequest:withContext:error:] + 409
14 CoreData 0x00f6eb1b -[NSPersistentStoreCoordinator executeRequest:withContext:error:] + 3691
15 CoreData 0x00ef6db8 -[NSManagedObjectContext save:] + 712
16 MyProgram 0x00006d19 -[DataParser parser:didEndElement:namespaceURI:qualifiedName:] + 1665
17 Foundation 0x00104a19 _endElementNs + 453
18 libxml2.2.dylib 0x01620e63 xmlParseXMLDecl + 1346
19 libxml2.2.dylib 0x0162bb6d xmlParseChunk + 3984
20 Foundation 0x0010421a -[NSXMLParser parse] + 321
21 MyProgram 0x0000653e -[DataParser parseXMLFileAtURL:parseError:] + 176
22 MyProgram 0x00002912 -[MyProgramAppDelegate application:didFinishLaunchingWithOptions:] + 664
23 UIKit 0x002cc1fa -[UIApplication _callInitializationDelegatesForURL:payload:suspended:] + 1163
24 UIKit 0x002ce55e -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 439
25 UIKit 0x002d8db2 -[UIApplication handleEvent:withNewEvent:] + 1533
26 UIKit 0x002d1202 -[UIApplication sendEvent:] + 71
27 UIKit 0x002d6732 _UIApplicationHandleEvent + 7576
28 GraphicsServices 0x01ac4a36 PurpleEventCallback + 1550
29 CoreFoundation 0x01170064 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 52
30 CoreFoundation 0x010d06f7 __CFRunLoopDoSource1 + 215
31 CoreFoundation 0x010cd983 __CFRunLoopRun + 979
32 CoreFoundation 0x010cd240 CFRunLoopRunSpecific + 208
33 CoreFoundation 0x010cd161 CFRunLoopRunInMode + 97
34 UIKit 0x002cdfa8 -[UIApplication _run] + 636
35 UIKit 0x002da42e UIApplicationMain + 1160
36 MyProgram 0x000023e6 main + 84
37 MyProgram 0x00002389 start + 53
是否有人在什麼都可能導致這個有什麼建議?我相信這可能與MyClass有關,但我應該如何解決這個問題?我忘了爲它寫點東西嗎?
在數據模型中,我確實把myClass作爲Transformable類型。自動生成的實體文件將myClass列爲id * myClass。因此,除了在@implementation for myClass中實現NSCoding之外,我應該做什麼? – 2011-05-15 17:27:19
你應該只需要實現NSCoding。 – 2011-05-15 17:51:38
工作就像一個魅力。謝謝! – 2011-05-15 22:38:18