两天来我一直在努力解决一个奇怪的问题。我经历了关于 SO 的所有相关问题，但没有一个解决问题。我正在研究 Xcode5。我正在使用 ARC 和 CoreData。
在 iOS7（模拟器）上：
`[CFString release]: message sent to deallocated instance`
Thread 1, Queue : com.apple.main-thread
0 0x03c7d3ba in __kill ()
1 0x03c7c4b8 in kill$UNIX2003 ()
2 0x0347a921 in ___forwarding___ ()
3 0x0347a4ee in _CF_forwarding_prep_0 ()
4 0x02b7b002 in -[NSConcreteAttributedString dealloc] ()
5 0x02f66692 in objc_object::sidetable_release(bool) ()
6 0x02f65e81 in objc_release ()
7 0x02f66ce7 in (anonymous namespace)::AutoreleasePoolPage::pop(void*) ()
8 0x00739bc4 in CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) ()
9 0x0345253e in __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ ()
10 0x0345248f in __CFRunLoopDoObservers ()
11 0x034303b4 in __CFRunLoopRun ()
12 0x0342fb33 in CFRunLoopRunSpecific ()
13 0x0342f94b in CFRunLoopRunInMode ()
14 0x04bd19d7 in GSEventRunModal ()
15 0x04bd17fe in GSEventRun ()
16 0x0196794b in UIApplicationMain ()
17 0x0000262d in main
Zombies Instruments 指向我设置单元格文本标签的第二行：
cell.txtLabel.text = _reservationModule.newReservationText;
cell.subtitleTxtLabel.text = _reservationModule.newReservationSubtitle;
_reservationModule是具有字符串属性的核心数据实体。它在视图控制器中定义为@property (nonatomic, strong) ReservationModule *reservationModule;
僵尸历史：
Event Type ∆ RefCt RefCt Timestamp Responsible Library Responsible Caller
Malloc/Retain/Release (4) 01:01.114.922 CoreData _prepareResultsFromResultSet
0 Malloc +1 1 01:01.114.922 CoreData _prepareResultsFromResultSet
1 Retain +1 2 01:01.116.184 CoreData -[_CDSnapshot mutableCopy]
2 Release -1 1 01:01.318.588 MyApp -[ReservationModuleChoice2ViewController configureSubtitleImageTableViewCell:atIndexPath:]
3 Release -1 0 01:05.004.359 CoreData -[_CDSnapshot dealloc]
4 Zombie -1 01:07.441.465 CoreData -[_CDSnapshot dealloc]
不过，它们从未在 Xcode 4.6.x 上出现过。非常感谢任何帮助！
谢谢！