/SourceCache/ProtocolBuffer_Sim/ProtocolBuffer-225/Runtime/PBRequester.m:799 server (https://gsp13-cn.ls.apple.com/localshift) returned error: 504

 Failed to get location shift function: Error Domain=NSURLErrorDomain Code=-1011 "The operation couldn’t be completed. (NSURLErrorDomain error -1011.)" UserInfo=0x7d2d6be0 {PBHTTPStatusCode=504}

PBRequester failed with Error Error Domain=NSURLErrorDomain Code=-1001 "The request timed out." UserInfo=0x811e4390 {NSErrorFailingURLStringKey=https://gsp13-cn.ls.apple.com/localshift, NSErrorFailingURLKey=https://gsp13-cn.ls.apple.com/localshift, NSLocalizedDescription=The request timed out., NSUnderlyingError=0x7f27d470 "The request timed out."}

Failed to get location shift function: Error Domain=NSURLErrorDomain Code=-1001 "The request timed out." UserInfo=0x811e4390 {NSErrorFailingURLStringKey=https://gsp13-cn.ls.apple.com/localshift, NSErrorFailingURLKey=https://gsp13-cn.ls.apple.com/localshift, NSLocalizedDescription=The request timed out., NSUnderlyingError=0x7f27d470 "The request timed out."}

有可能是因为虚拟器连接不到网络, 而不是代码的问题, 过一会再试就正常了

所有的错误代码是在对“CFNetwork的错误代码参考” 小提取CFURL和CFURLConnection错误：

 kCFURLErrorUnknown = -998,

 kCFURLErrorCancelled = -999,

 kCFURLErrorBadURL = -1000,

 kCFURLErrorTimedOut = -1001,

 kCFURLErrorUnsupportedURL = -1002,

 kCFURLErrorCannotFindHost = -1003,

 kCFURLErrorCannotConnectToHost = -1004,

 kCFURLErrorNetworkConnectionLost = -1005,

 kCFURLErrorDNSLookupFailed  = -1006,

 kCFURLErrorHTTPTooManyRedirects = -1007,

 kCFURLErrorResourceUnavailable = -1008,

 kCFURLErrorNotConnectedToInternet = -1009,

 kCFURLErrorRedirectToNonExistentLocation = -1010,

 kCFURLErrorBadServerResponse    = -1011,

 kCFURLErrorUserCancelledAuthentication = -1012,

 kCFURLErrorUserAuthenticationRequired = -1013,

 kCFURLErrorZeroByteResource  = -1014,

 kCFURLErrorCannotDecodeRawData  = -1015,

 kCFURLErrorCannotDecodeContentData = -1016,

 kCFURLErrorCannotParseResponse  = -1017,

 kCFURLErrorInternationalRoamingOff = -1018,

 kCFURLErrorCallIsActive    = -1019,

 kCFURLErrorDataNotAllowed    = -1020,

 kCFURLErrorRequestBodyStreamExhausted = -1021,

 kCFURLErrorFileDoesNotExist   = -1100,

 kCFURLErrorFileIsDirectory   = -1101,

 kCFURLErrorNoPermissionsToReadFile = -1102,

 kCFURLErrorDataLengthExceedsMaximum = -1103,