ios – Xcode 6链接器错误 – 架构armv7的未定义符号

Undefined symbols for architecture armv7:
“_swift_stdlib_compareNSStringDeterministicUnicodeCollation”,referenced from:

…

ld: symbol(s) not found for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)

我已经看到其他SO帖子建议删除Derived Data文件夹和/或使用Clean Build Folder选项来解决此错误，但在我的情况下，该解决方案根本没有帮助。关于我的代码或我正在使用的CocoaPods没有任何改变，因为Xcode 6 beta 5是它最后一次工作。

有任何想法吗？

编辑：

错误日志的完整发布：

Undefined symbols for architecture arm64:
“_swift_stdlib_compareNSStringDeterministicUnicodeCollation”,referenced from:
TFC12MyProject21BarcodeViewController13captureOutputfS0_FTGSQCSo15AVCaptureOutput_24didOutputMetadataObjectsGSQGSaPSs9AnyObject___14fromConnectionGSQCSo19AVCaptureConnection__T_ in BarcodeViewController.o
“__TFSs21_arrayConditionalCastU___FGSaQ__GSqGSaQ0_“,referenced from:
TFC12MyProject27SessionsTableViewController17viewWillDisappearfS0_FSbT_ in SessionsTableViewController.o
“__TFSs15_arrayForceCastU___FGSaQ__GSaQ0“,referenced from:
__TFC12MyProject7RestApi12tokenMappingfS0_FT_CSo15RKEntityMapping in RestApi.o
__TFC12MyProject28AttendeesTableViewControllerg24fetchedResultsControllerCSo26NSFetchedResultsController in AttendeesTableViewController.o
__TFC12MyProject27SessionsTableViewControllerg24fetchedResultsControllerCSo26NSFetchedResultsController in SessionsTableViewController.o
__TFC12MyProject21BarcodeViewController13startScanningfS0_FT_Sb in BarcodeViewController.o
“__TFSs26_forceBridgeFromObjectiveCU__FTPSs9AnyObject_MQ__Q_”,referenced from:
__TFC12MyProject7RestApi12resetRestKitfS0_FT_T_ in RestApi.o
__TFC12MyProject16BluetoothManager17_startAdvertisingfS0_FT_T_ in BluetoothManager.o
__TFC12MyProject19LoginViewController32registerForKeyboardNotificationsfS0_FT_T_ in LoginViewController.o
__TFC12MyProject19LoginViewController35deregisterFromKeyboardNotificationsfS0_FT_T_ in LoginViewController.o
__TFC12MyProject19LoginViewController16callProcessLoginfS0_FT_T_ in LoginViewController.o
__TFC12MyProject21CheckinViewController16enableBeaconModefS0_FT_T_ in CheckinViewController.o
__TFC12MyProject21BarcodeViewController13startScanningfS0_FT_Sb in BarcodeViewController.o
…
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)