使用 StoreKit 编写未记录的 NSURLErrorDomain 错误代码(-1001、 -1003和 -1004)

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I have similar problems, in my case seem to be related to network connectivity:

Error Domain=NSURLErrorDomain Code=-1001 "The request timed out."

Things to check:

Is there any chance that your server is not able to respond within some time limit? Like 60 seconds or 4 minutes?
Is there a possibility that your device is switching networks (WiFi, 3G, VPN)?
Could someone (client vs. server) be waiting for authentication?

Sorry, no ideas how to fix. Just debugging this, trying to find out what the problem is (-1021, -1001, -1009)

Update: Google search was very kind to find this:

-1001 TimedOut - it took longer than the timeout which was alotted.
-1003 CannotFindHost - the host could not be found.
-1004 CannotConnectToHost - the host would not let us establish a connection.

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最佳答案

All error codes are on "CFNetwork Errors Codes References" on the documentation (link)

A small extraction for CFURL and CFURLConnection Errors:

  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,

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I use the following method in my project

-(NSArray*)networkErrorCodes
{
static NSArray *codesArray;
if (![codesArray count]){
@synchronized(self){
const int codes[] = {
//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
};
int size = sizeof(codes)/sizeof(int);
NSMutableArray *array = [[NSMutableArray alloc] init];
for (int i=0;i<size;++i){
[array addObject:[NSNumber numberWithInt:codes[i]]];
}
codesArray = [array copy];
}
}
return codesArray;
}

Then I just check the error code and show alert if it is in the list

if ([[self networkErrorCodes] containsObject:[NSNumber
numberWithInt:[error code]]]){
// Fire Alert View Here
}

But as you can see I commented out codes that I think does not fit to my definition of NO INTERNET. E.g the code of -1012 (Authentication fail.) You may edit the list as you like.

In my project I use it at username/password entering from user. And in my view (physical) network connection errors could be the only reason to show alert view in your network based app. In any other case (e.g. incorrect username/password pair) I prefer to do some custom user friendly animation, OR just repeat the failed attempt again without any attention of the user. Especially if the user didn't explicitly initiated a network call.

Regards to martinezdelariva for a link to documentation.

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I found this page in the documentation which has an objective-c enum for all of the error codes under the NSURLErrorDomain.

https://developer.apple.com/library/ios/documentation/Cocoa/Reference/Foundation/Miscellaneous/Foundation_Constants/index.html#//apple_ref/doc/constant_group/URL_Loading_System_Error_Codes

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see NSURLError.h Define

NSURLErrorUnknown =             -1,
NSURLErrorCancelled =           -999,
NSURLErrorBadURL =              -1000,
NSURLErrorTimedOut =            -1001,
NSURLErrorUnsupportedURL =          -1002,
NSURLErrorCannotFindHost =          -1003,
NSURLErrorCannotConnectToHost =         -1004,
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,
NSURLErrorAppTransportSecurityRequiresSecureConnection NS_ENUM_AVAILABLE(10_11, 9_0) = -1022,
NSURLErrorFileDoesNotExist =        -1100,
NSURLErrorFileIsDirectory =         -1101,
NSURLErrorNoPermissionsToReadFile =     -1102,
NSURLErrorDataLengthExceedsMaximum NS_ENUM_AVAILABLE(10_5, 2_0) =   -1103,


// SSL errors
NSURLErrorSecureConnectionFailed =      -1200,
NSURLErrorServerCertificateHasBadDate =     -1201,
NSURLErrorServerCertificateUntrusted =  -1202,
NSURLErrorServerCertificateHasUnknownRoot = -1203,
NSURLErrorServerCertificateNotYetValid =    -1204,
NSURLErrorClientCertificateRejected =   -1205,
NSURLErrorClientCertificateRequired =   -1206,
NSURLErrorCannotLoadFromNetwork =       -2000,


// Download and file I/O errors
NSURLErrorCannotCreateFile =        -3000,
NSURLErrorCannotOpenFile =          -3001,
NSURLErrorCannotCloseFile =         -3002,
NSURLErrorCannotWriteToFile =       -3003,
NSURLErrorCannotRemoveFile =        -3004,
NSURLErrorCannotMoveFile =          -3005,
NSURLErrorDownloadDecodingFailedMidStream = -3006,
NSURLErrorDownloadDecodingFailedToComplete =-3007,


NSURLErrorInternationalRoamingOff NS_ENUM_AVAILABLE(10_7, 3_0) =         -1018,
NSURLErrorCallIsActive NS_ENUM_AVAILABLE(10_7, 3_0) =                    -1019,
NSURLErrorDataNotAllowed NS_ENUM_AVAILABLE(10_7, 3_0) =                  -1020,
NSURLErrorRequestBodyStreamExhausted NS_ENUM_AVAILABLE(10_7, 3_0) =      -1021,


NSURLErrorBackgroundSessionRequiresSharedContainer NS_ENUM_AVAILABLE(10_10, 8_0) = -995,
NSURLErrorBackgroundSessionInUseByAnotherProcess NS_ENUM_AVAILABLE(10_10, 8_0) = -996,
NSURLErrorBackgroundSessionWasDisconnected NS_ENUM_AVAILABLE(10_10, 8_0)= -997,

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I found a new error code which is not documented above: CFNetworkErrorCode -1022

Error Domain=NSURLErrorDomain Code=-1022 "The resource could not be loaded because the App Transport Security policy requires the use of a secure connection."