iOS开发之－－iOS网络请求错误码。

今天无聊刷脉脉，可是发现怎么刷都出现错误－1003，后来改为wifi网络下，变成错误－1001，上网查找了一番发现分别为找不到host和请求超时。

官方链接为：

<a target=_blank href="https://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Miscellaneous/Foundation_Constants/Reference/reference.html" target="_blank" style="color: rgb(255, 153, 0); text-decoration: none;">https://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Miscellaneous/Foundation_Constants/Reference/reference.html</a>

我将swift和oc的摘抄出来了。

Declaration

SWIFT

varNSURLErrorUnknown:

Int
{
get }

varNSURLErrorCancelled:

Int
{
get }

varNSURLErrorBadURL:

Int
{
get }

varNSURLErrorTimedOut:

Int
{
get }

varNSURLErrorUnsupportedURL:

Int
{
get }

varNSURLErrorCannotFindHost:

Int
{
get }

varNSURLErrorCannotConnectToHost:

Int
{
get }

varNSURLErrorDataLengthExceedsMaximum:

Int
{
get }

varNSURLErrorNetworkConnectionLost:

Int
{
get }

varNSURLErrorDNSLookupFailed:

Int
{
get }

varNSURLErrorHTTPTooManyRedirects:

Int
{
get }

varNSURLErrorResourceUnavailable:

Int
{
get }

varNSURLErrorNotConnectedToInternet:

Int
{
get }

varNSURLErrorRedirectToNonExistentLocation:

Int
{
get }

varNSURLErrorBadServerResponse:

Int
{
get }

varNSURLErrorUserCancelledAuthentication:

Int
{
get }

varNSURLErrorUserAuthenticationRequired:

Int
{
get }

varNSURLErrorZeroByteResource:

Int
{
get }

varNSURLErrorCannotDecodeRawData:

Int
{
get }

varNSURLErrorCannotDecodeContentData:

Int
{
get }

varNSURLErrorCannotParseResponse:

Int
{
get }

varNSURLErrorInternationalRoamingOff:

Int
{
get }

varNSURLErrorCallIsActive:

Int
{
get }

varNSURLErrorDataNotAllowed:

Int
{
get }

varNSURLErrorRequestBodyStreamExhausted:

Int
{
get }

varNSURLErrorFileDoesNotExist:

Int
{
get }

varNSURLErrorFileIsDirectory:

Int
{
get }

varNSURLErrorNoPermissionsToReadFile:

Int
{
get }

varNSURLErrorSecureConnectionFailed:

Int
{
get }

varNSURLErrorServerCertificateHasBadDate:

Int
{
get }

varNSURLErrorServerCertificateUntrusted:

Int
{
get }

varNSURLErrorServerCertificateHasUnknownRoot:

Int
{
get }

varNSURLErrorServerCertificateNotYetValid:

Int
{
get }

varNSURLErrorClientCertificateRejected:

Int
{
get }

varNSURLErrorClientCertificateRequired:

Int
{
get }

varNSURLErrorCannotLoadFromNetwork:

Int
{
get }

varNSURLErrorCannotCreateFile:

Int
{
get }

varNSURLErrorCannotOpenFile:

Int
{
get }

varNSURLErrorCannotCloseFile:

Int
{
get }

varNSURLErrorCannotWriteToFile:

Int
{
get }

varNSURLErrorCannotRemoveFile:

Int
{
get }

varNSURLErrorCannotMoveFile:

Int
{
get }

varNSURLErrorDownloadDecodingFailedMidStream:

Int
{
get }

varNSURLErrorDownloadDecodingFailedToComplete:

Int
{
get }

OBJECTIVE-C

enum{
 

NSURLErrorUnknown=

-1,
 

NSURLErrorCancelled=

-999,
 

NSURLErrorBadURL=

-1000,
 

NSURLErrorTimedOut=

-1001,
 

NSURLErrorUnsupportedURL=

-1002,
 

NSURLErrorCannotFindHost=

-1003,
 

NSURLErrorCannotConnectToHost=

-1004,
 

NSURLErrorDataLengthExceedsMaximum=

-1103, 

NSURLErrorNetworkConnectionLost=

-1005,
 

NSURLErrorDNSLookupFailed=

-1006,
 

NSURLErrorHTTPTooManyRedirects=

-1007, 

NSURLErrorResourceUnavailable=

-1008,
 

NSURLErrorNotConnectedToInternet=

-1009,
 

NSURLErrorRedirectToNonExistentLocation=

-1010,

 

NSURLErrorBadServerResponse=-1011,
 

NSURLErrorUserCancelledAuthentication=

-1012,
 

NSURLErrorUserAuthenticationRequired=

-1013,
 

NSURLErrorZeroByteResource=

-1014,
 

NSURLErrorCannotDecodeRawData=

-1015,
 

NSURLErrorCannotDecodeContentData=

-1016,
 

NSURLErrorCannotParseResponse=

-1017,
 

NSURLErrorInternationalRoamingOff=

-1018,
 

NSURLErrorCallIsActive=

-1019,
 

NSURLErrorDataNotAllowed=

-1020,
 

NSURLErrorRequestBodyStreamExhausted=

-1021, 

NSURLErrorFileDoesNotExist=

-1100,
 

NSURLErrorFileIsDirectory=

-1101,
 

NSURLErrorNoPermissionsToReadFile=

-1102,
 

NSURLErrorSecureConnectionFailed=

-1200,
 

NSURLErrorServerCertificateHasBadDate=

-1201,
 

NSURLErrorServerCertificateUntrusted=

-1202,
 

NSURLErrorServerCertificateHasUnknownRoot=

-1203,
 

NSURLErrorServerCertificateNotYetValid=

-1204,
 

NSURLErrorClientCertificateRejected=

-1205,
 

NSURLErrorClientCertificateRequired=

-1206,
 

NSURLErrorCannotLoadFromNetwork=

-2000,
 

NSURLErrorCannotCreateFile=

-3000,
 

NSURLErrorCannotOpenFile=

-3001,
 

NSURLErrorCannotCloseFile=

-3002,
 

NSURLErrorCannotWriteToFile=

-3003,
 

NSURLErrorCannotRemoveFile=

-3004,
 

NSURLErrorCannotMoveFile=

-3005,
 

NSURLErrorDownloadDecodingFailedMidStream=

-3006,
 

NSURLErrorDownloadDecodingFailedToComplete=

-3007

}