app在模擬器是哪個啟動成功會自動連接服務器，然後Xcode控制臺報錯，

模擬器 PAC Fetch failed with error [NSURLErrorDomain:-1001]

這類問題有好多類似的錯誤代碼，看英文可以大概知道他的意思，-1001 代碼是超時之類的錯誤。PAC 是 (代理自動配置)，然後我們可以在系統偏好設置->網絡->高級->代理 發現有代理錯誤。可以發現如果有比較詭異的代理，需要手動清除，或者是你開了科學上網自動代理的工具。請先退出這些軟件，然後再用模擬器打開app,可以正常聯網了。PAC錯誤的日誌可能還在。不過-1001錯誤消失了。

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,

iOS 模擬器運行不能聯網 PAC Fetch failed with error