How to fix NSURLErrorDomain error -1012 when authenticating?

I am dealing with a problem of authenticating with a Tumblr account using [NSURLConnection sendAsynchronousRequest:queue:completionHandler:]

to submit an authentication request, but here I am meeting a tough problem:

  • Whenever I submit the request for the first time everything goes fine, but when the first authentication is done and then the request is resubmitted a second time , "NSURLErrorDomain error -1012" occurs.
  • The authentication page is loaded into the webview so that authentication takes place in my application without a browser. But it is interesting that if the process is launched in the browser, no errors occur, errors only occur when using the webview .
  • It was strange that the authentication is done with the same code, but only the first authentication can be done, only if I reinstall the app, I can authenticate it again, and after that the problem reoccurs.
  • I did everything I could to solve the problem, I clear the cache and cookies in the web browser, find the authentication process to see the parameters, set the request's cachePolicy, but nothing helps.
  • I also found that on ios6 the process goes without errors. But on ios7 I get -1012.
  • code -1012 tells me that the user has canceled the authentication, but the process is automatic and I am not canceling it.

I'm wondering if the problem comes from NSURLConnection


- (void)authenticate:(NSString *)URLScheme WithViewController:(UIViewController *)con callback:(TMAuthenticationCallback)callback {
self.threeLeggedOAuthTokenSecret = nil;
self.hostViewController = con;
self.callback = callback;
[self emptyCookieJar];

NSString *tokenRequestURLString = [NSString stringWithFormat:@"", TMURLEncode([NSString stringWithFormat:@"%@://tumblr-authorize", URLScheme])];
NSLog(@"%@", tokenRequestURLString);

NSMutableURLRequest *request = mutableRequestWithURLString(tokenRequestURLString);
NSLog(@"%@", request);
[[self class] signRequest:request withParameters:nil consumerKey:self.OAuthConsumerKey
           consumerSecret:self.OAuthConsumerSecret token:nil tokenSecret:nil];
[self openOAuthViewController];
NSURLConnectionCompletionHandler handler = ^(NSURLResponse *response, NSData *data, NSError *error) {
    NSInteger statusCode = ((NSHTTPURLResponse *)response).statusCode;
    if (error) {
        if (callback) {
            callback(nil, nil, error);

    NSLog(@"%d", statusCode);
    if (statusCode == 200) {
        self.threeLeggedOAuthCallback = callback;

        NSDictionary *responseParameters = formEncodedDataToDictionary(data);
        self.threeLeggedOAuthTokenSecret = responseParameters[@"oauth_token_secret"];

        NSURL *authURL = [NSURL URLWithString:
                          [NSString stringWithFormat:@"",

        [self initOAuthViewControllerWithURL:authURL];
    } else {
        if (callback) {
            callback(nil, nil, errorWithStatusCode(statusCode));
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:handler];


The code above, everything goes fine before and after this method I got an error in . [NSURLConnection sendAsynchronousRequest:queue:completionHandler:]



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