Xcode 核心数据：bundle.main.url意外（突然）返回NIL
由于某种原因，默认的核心数据代码正在抛出错误。这是在我尝试迁移到数据模型的新版本后开始发生的，所以我确信我做了一些事情来搞砸这件事。以下是相关代码：Xcode 核心数据：bundle.main.url意外（突然）返回NIL,xcode,cocoa,nsuserdefaults,Xcode,Cocoa,Nsuserdefaults,由于某种原因，默认的核心数据代码正在抛出错误。这是在我尝试迁移到数据模型的新版本后开始发生的，所以我确信我做了一些事情来搞砸这件事。以下是相关代码： enter colazy var managedObjectModel: NSManagedObjectModel = { // The managed object model for the application. This property is not optional. It is a fatal error for the a
enter colazy var managedObjectModel: NSManagedObjectModel = {
// The managed object model for the application. This property is not optional. It is a fatal error for the application not to be able to find and load its model.
let modelURL = Bundle.main.url(forResource: "Band_Manager_2_0", withExtension: "momd")!
return NSManagedObjectModel(contentsOf: modelURL)!
}()
enter let modelURL = Bundle.main.url(forResource: "Band_Manager_2_0", withExtension: "momd")!code here
fatal error: unexpectedly found nil while unwrapping an Optional value
2017-04-21 14:17:01.620046-0400 Band Manager 2.0[5826:164435] fatal error: unexpectedly found nil while unwrapping an Optional value
Current stack trace:
0 libswiftCore.dylib 0x0000000100425160 swift_reportError + 129
1 libswiftCore.dylib 0x0000000100441b80 _swift_stdlib_reportFatalError + 60
2 libswiftCore.dylib 0x0000000100231a00 specialized specialized StaticString.withUTF8Buffer<A> ((UnsafeBufferPointer<UInt8>) -> A) -> A + 342
3 libswiftCore.dylib 0x00000001003acec0 partial apply for (_fatalErrorMessage(StaticString, StaticString, file : StaticString, line : UInt, flags : UInt32) -> Never).(closure #2) + 109
4 libswiftCore.dylib 0x0000000100231a00 specialized specialized StaticString.withUTF8Buffer<A> ((UnsafeBufferPointer<UInt8>) -> A) -> A + 342
5 libswiftCore.dylib 0x000000010035f4a0 specialized _fatalErrorMessage(StaticString, StaticString, file : StaticString, line : UInt, flags : UInt32) -> Never + 96
6 Band Manager 2.0 0x000000010005f500 AppDelegate.(managedObjectModel.getter).(closure #1) + 463
7 Band Manager 2.0 0x000000010005d8d0 AppDelegate.managedObjectModel.getter + 194
8 Band Manager 2.0 0x000000010005f880 AppDelegate.(persistentStoreCoordinator.getter).(closure #1) + 1115
9 Band Manager 2.0 0x000000010005dad0 AppDelegate.persistentStoreCoordinator.getter + 211
10 Band Manager 2.0 0x0000000100061020 AppDelegate.(managedObjectContext.getter).(closure #1) + 35
11 Band Manager 2.0 0x000000010005dce0 AppDelegate.managedObjectContext.getter + 211
12 Band Manager 2.0 0x000000010005a0d0 AppDelegate.applicationDidFinishLaunching(Notification) -> () + 51
13 Band Manager 2.0 0x000000010005d530 @objc AppDelegate.applicationDidFinishLaunching(Notification) -> () + 71
14 CoreFoundation 0x00007fff85d1c520 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12
15 CoreFoundation 0x00007fff85d1c280 _CFXRegistrationPost + 427
16 CoreFoundation 0x00007fff85d1c160 ___CFXNotificationPost_block_invoke + 50
17 CoreFoundation 0x00007fff85cd9f90 -[_CFXNotificationRegistrar find:object:observer:enumerator:] + 2018
18 CoreFoundation 0x00007fff85cd94c0 _CFXNotificationPost + 667
19 Foundation 0x00007fff8771a955 -[NSNotificationCenter postNotificationName:object:userInfo:] + 66
20 AppKit 0x00007fff839439f6 -[NSApplication _postDidFinishNotification] + 297
21 AppKit 0x00007fff839437b4 -[NSApplication _sendFinishLaunchingNotification] + 208
22 AppKit 0x00007fff838069c1 -[NSApplication(NSAppleEventHandling) _handleAEOpenEvent:] + 552
23 AppKit 0x00007fff838065a6 -[NSApplication(NSAppleEventHandling) _handleCoreEvent:withReplyEvent:] + 661
24 Foundation 0x00007fff87765cfb -[NSAppleEventManager dispatchRawAppleEvent:withRawReply:handlerRefCon:] + 290
25 Foundation 0x00007fff87765c31 _NSAppleEventManagerGenericHandler + 102
26 AE 0x00007fff86b6ad06 aeDispatchAppleEvent(AEDesc const*, AEDesc*, unsigned int, unsigned char*) + 544
27 AE 0x00007fff86b6ac76 dispatchEventAndSendReply(AEDesc const*, AEDesc*) + 39
28 AE 0x00007fff86b6aa71 aeProcessAppleEvent + 312
29 HIToolbox 0x00007fff85277da8 AEProcessAppleEvent + 55
30 AppKit 0x00007fff838019c4 _DPSNextEvent + 1833
31 AppKit 0x00007fff83f7cd72 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 2796
32 AppKit 0x00007fff837f640d -[NSApplication run] + 926
33 AppKit 0x00007fff837c0d09 NSApplicationMain + 1237
34 Band Manager 2.0 0x00000001000613d0 main + 13
35 libdyld.dylib 0x00007fff9b8ad234 start + 1
(lldb)
致命错误：在展开可选值时意外发现nil
2017-04-21 14:17:01.620046-0400波段管理器2.0[5826:164435]致命错误：在展开可选值时意外发现零
当前堆栈跟踪：
0 libswiftCore.dylib 0x0000000100425160 swift_报告错误+129
1 libswiftCore.dylib 0x0000000100441b80 _swift_stdlib_reportFatalError+60
2 libswiftCore.dylib 0x0000000100231a00专用静态字符串.withUTF8Buffer（（UnsafeBufferPointer）->A）->A+342
3 libswiftCore.dylib 0x00000001003acec0部分申请（_fatalErrorMessage（StaticString，StaticString，file:StaticString，line:UInt，flags:UInt32）->从不）。（闭包#2）+109
4 libswiftCore.dylib 0x0000000100231a00专用静态字符串.withUTF8Buffer（（UnsafeBufferPointer）->A）->A+342
5 libswiftCore.dylib 0x000000010035f4a0专用\u fatalErrorMessage（StaticString，StaticString，文件：StaticString，行：UInt，标志：UInt32）->从不+96
6 Band Manager 2.0 0x000000010005f500 AppDelegate.（managedObjectModel.getter）。（闭包#1）+463
7波段管理器2.0 0x000000010005d8d0 AppDelegate.managedObjectModel.getter+194
8 Band Manager 2.0 0x000000010005f880 AppDelegate.（persistentStoreCoordinator.getter）。（闭包#1）+1115
9频带管理器2.0 0x000000010005dad0 AppDelegate.persistentStoreCoordinator.getter+211
10 Band Manager 2.0 0x0000000100061020 AppDelegate.（managedObjectContext.getter）。（闭包#1）+35
11频带管理器2.0 0x000000010005dce0 AppDelegate.managedObjectContext.getter+211
12频带管理器2.0 0x000000010005a0d0 AppDelegate.ApplicationIDFinishLaunching（通知）->（）+51
13频带管理器2.0 0x000000010005d530@objc AppDelegate.ApplicationIDFinishLaunching（通知）->（）+71
14 CoreFoundation 0x00007fff85d1c520通知中心正在向观察员发出通知
15 CoreFoundation 0x00007fff85d1c280 _CFXRegistrationPost+427
16 CoreFoundation 0x00007fff85d1c160\uuuuuuuuuuxNotificationPost\u block\u invoke+50
17 CoreFoundation 0x00007fff85cd9f90-[\u cfxNotificationRegistrator查找：对象：观察者：枚举器：][2018
18芯基金会0x00007fff85cd94c0_CFXNotificationPost+667
19基金会0x000 7FFF877 1A955 - [ NSnPosiCICTICStestPoNoTestCurryNoTe:对象：USER信息：] + 66
20应用套件0x00007fff839439f6-[NSApplication\u postDidFinishNotification]+297
21 AppKit 0x00007fff839437b4-[n应用程序发送完成启动通知]+208
22应用套件0x00007fff838069c1-[NSAPPLEEVENTHANDING（NSAPPLEEVENTHANDING）\U HANDLEEOPENEVENT:+552
23应用套件0x00007fff838065a6-[NSAPPLEEVENTHANDING（NSAPPLEEVENTHANDING）\u handleCoreEvent:with replyEvent:+661
24基金会0x000 7FFF877 65 CFB-[ NSAPPIENEngEngestDeppsRaWaPrApEngult:WrrWeReff:HoalLeReFCON::] + 290
25基金会0x000、7FFF877、C31、NSpApple EngEngEngEngEngEngtRANDER + 102
26 AE 0x00007fff86b6ad06 AEDISPATCH应用程序事件（AEDesc常量*、AEDesc*、无符号整数、无符号字符*）+544
27 AE 0x00007fff86b6ac76调度事件和发送回复（AEDesc常量*，AEDesc*）+39
28 AE 0x00007fff86b6aa71 AEProcessAppleeEvent+312
29 HIToolbox 0x00007fff85277da8 AEProcessAppleEvent+55
30应用套件0x00007fff838019c4 _dpsnextent+1833
31 AppKit 0x00007fff83f7cd72-[NSApplication（NSEvent）\下一个VentMatchingVentMask:untilDate:inMode:dequeue:+2796
32应用套件0x00007fff837f640d-[N应用程序运行]+926
33应用套件0x00007fff837c0d09 NSApplicationMain+1237
34频带管理器2.0 0x00000001000613d0主+13
35 libdyld.dylib 0x00007fff9b8ad234开始+1
（lldb）
更新：我应该澄清，我理解发生这种情况的技术原因（没有找到所需的资源），但我不知道如何解决这个问题。它似乎找不到的资源是在过去某个时候自动生成的。我似乎不知道如何让XCODE重新生成所需的文件，甚至不知道它为什么会丢失。好的。所以我想出了这个 大约一周前，我将核心数据文件从“Band Manager_2_0”重命名为“bmData”，在过去的一周里，一切都很正常。然而，今天，当我迁移数据时，它最终“中断”了连接 我不知道为什么重命名文件后连接没有立即中断，这会让我陷入问题。它一定是以我今天破坏的方式兑现了这个地点 特别令人困惑的是，代码的扩展名是“momd”，而实际文件的扩展名是o