http://apiwiki.twitter.com/w/page/22554652/HTTP-Response-Codes-and-Errors
401 Unauthorized: Authentication credentials were missing or
incorrect.

Possible that your xAuth has been rejected?

On Apr 28, 1:36 am, Matt Wang <ma...@theappbusiness.com> wrote:
> Dear Sir or Madam,
>
> I am programming for Number 10 iphone application.Currently,this
> application has xAuth access and can post information via twitter.
>
> However, when I try to call [twitterEngine
> enableUpdatesFor:@"follower"] for adding a follower. it will return a
> 401 error.
>
> here is my code:
>
> - (void)accessTokenReceived:(OAToken *)token forRequest:(NSString
> *)connectionIdentifier {
>
>         [self.twitterEngine setAccessToken:token];
>
> }
>
> - (void)requestSucceeded:(NSString *)requestIdentifier{
>
>         switch (stage) {
>                 case postLogin:
>
>                         stage = loginCorrect;
>                         break;
>                 case loginCorrect:
>
>                         if (twitterAction == follow) {
>                                 NSString *follower = [NSString 
> stringWithFormat:@"Number10gov"];
>                                 NSLog(@"Try to Follow %@",follower);
>                                 NSLog(@"enableUpdatesFor: 
> connectionIdentifier = %@",
> [twitterEngine enableUpdatesFor:follower]);
>
>                         } else if (twitterAction == retweet || twitterAction 
> == tweet) {
> ...............
> //
>
> post and retweet work well. but follow action didn't work. could you
> help me to point out what is the problem?
>
> if you can give me a example code to show how to do follow action in
> xAuth, that would be great.
>
> Many Thanks for your help.
>
> I am looking forward to your reply.
>
> Many thanks.

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