NSURLConnection错误

Question

什么是"Error Domain=NSURLErrorDomain Code=-1020 UserInfo=0x1694a0“操作无法完成。(NSURLErrorDomain错误-1020。)“”由于?？

Answer 1

您从NSURLConnection获得的错误代码位于NSURLError.h和CFNetworkErrors.h以及this Apple documentation中。看起来-1020是kCFURLErrorDataNotAllowed，它说：

“连接失败，因为设备上当前不允许使用数据。”

Answer 2

要查看CFNetworkErrors，请访问CFNetwork.CFNetworkErrors

CFNetworkErrors.cfurlErrorDataNotAllowed.rawValue (Int32值= -1020)

case cfurlErrorBadURL = -1000
case cfurlErrorTimedOut = -1001
case cfurlErrorUnsupportedURL = -1002
case cfurlErrorCannotFindHost = -1003
case cfurlErrorCannotConnectToHost = -1004
case cfurlErrorNetworkConnectionLost = -1005
case cfurlErrorDNSLookupFailed = -1006
case cfurlErrorHTTPTooManyRedirects = -1007
case cfurlErrorResourceUnavailable = -1008
case cfurlErrorNotConnectedToInternet = -1009
case cfurlErrorRedirectToNonExistentLocation = -1010
case cfurlErrorBadServerResponse = -1011
case cfurlErrorUserCancelledAuthentication = -1012
case cfurlErrorUserAuthenticationRequired = -1013
case cfurlErrorZeroByteResource = -1014
case cfurlErrorCannotDecodeRawData = -1015
case cfurlErrorCannotDecodeContentData = -1016
case cfurlErrorCannotParseResponse = -1017
case cfurlErrorInternationalRoamingOff = -1018
case cfurlErrorCallIsActive = -1019
case cfurlErrorDataNotAllowed = -1020
case cfurlErrorRequestBodyStreamExhausted = -1021
case cfurlErrorAppTransportSecurityRequiresSecureConnection = -1022
case cfurlErrorFileDoesNotExist = -1100
case cfurlErrorFileIsDirectory = -1101
case cfurlErrorNoPermissionsToReadFile = -1102
case cfurlErrorDataLengthExceedsMaximum = -1103
case cfurlErrorFileOutsideSafeArea = -1104

Answer 3

它不能解码数据......