Add error code for every particular error in a particular domain

[tikhop]

It will be useful if you need a special action after error handling.

[nst]

I'm not sure I understand your request. Could you please elaborate or give an example? Thank you in advance.

[tikhop]

So, for example, take STTwitterOS implementation, scroll down to line #85.

Here you create an error and pass a code equal to '0':

- (void)verifyCredentialsWithSuccessBlock:(void(^)(NSString *username))successBlock errorBlock:(void(^)(NSError *error))errorBlock {
    if([self hasAccessToTwitter] == NO) {
        NSString *message = @"This system cannot access Twitter.";
        NSError *error = [NSError errorWithDomain:NSStringFromClass([self class]) code:0 userInfo:@{NSLocalizedDescriptionKey : message}];
        errorBlock(error);
        return;
    }
    ....
}

Idea is to create a special error code for every particular error in a particular domain.

You can define enum for every particular domain or one for the entire project:

typedef NS_ENUM(NSUInteger, STTwitterOSErrorCode) {
    STTwitterOSErrorCodeCannotAccessTwitter, //This system cannot access Twitter.
        //etc
};

And later you use a code with error and client, who received that error can be used to compare that code.

...
//Sending error
 NSString *message = @"This system cannot access Twitter.";
        NSError *error = [NSError errorWithDomain:NSStringFromClass([self class]) code:STTwitterOSErrorCodeCannotAccessTwitter userInfo:@{NSLocalizedDescriptionKey : message}];
errorBlock(error);
...

...
//Handling error
 [_twitter verifyCredentialsWithSuccessBlock:^(NSString *username) {

        _loginStatusLabel.text = username;

    } errorBlock:^(NSError *error) {
        if(error.code == STTwitterOSErrorCodeCannotAccessTwitter) {
                //Do something special
        }

}];

[nst]

Thank you for this explanation. You're totally right. I'll add errors soon.

[tikhop]

You are welcome, thanks for understanding.

[nst]

41c9df9

[Arsalan90]

Hello can you plz help me I'm using STTwitter and using this method for reverse authentication but i'm getting error like this

Error Domain=STTwitterOS Code=0 "This system cannot access Twitter." UserInfo=0xd8f05b0 {NSLocalizedDescription=This system cannot access Twitter.

here what I'm using

  STTwitterAPI *twitter  = [STTwitterAPI twitterAPIWithOAuthConsumerKey:TWITTER_CONSUMER_KEY
                                                           consumerSecret:TWITTER_CONSUMER_SECRET];
[twitter postReverseOAuthTokenRequest:^(NSString *authenticationHeader) {

        STTwitterAPI *twitterAPIOS = [STTwitterAPI twitterAPIOSWithFirstAccount];

      [twitterAPIOS verifyCredentialsWithSuccessBlock:^(NSString *username) {

          [twitterAPIOS postReverseAuthAccessTokenWithAuthenticationHeader:authenticationHeader
                                                               successBlock:^(NSString *oAuthToken,
                                                                            NSString *oAuthTokenSecret,
                                                                              NSString *userID,
                                                                              NSString *screenName) {
                                                                    NSLog(@"oAuthToken: %@, oAuthTokenSecret: %@, userID: %@, screenName: %@", oAuthToken, oAuthTokenSecret, userID, screenName);

                                                                   self.twAuthData = @{@"oAuthToken" : oAuthToken,
                                                                                      @"oAuthTokenSecret" : oAuthTokenSecret,
                                                                                       @"userID" : userID,
                                                                                       @"screenName" : screenName};
                                                                   if ([self.twDelegate respondsToSelector:@selector(loginForNetwork:successful:needsRegistration:)]) {
                                                                        [self.twDelegate loginForNetwork:kNetworkType_TW successful:YES needsRegistration:YES];

}
          } errorBlock:^(NSError *error) {
              NSLog(@"error %@", error);
        }];

       } errorBlock:^(NSError *error) {
           NSLog(@"error %@", error);
             }];

   } errorBlock:^(NSError *error) {
       NSLog(@"error %@", error);
   }];

need your help

[nst]

Are you sure there is a Twitter account set up in iOS Settings? (or OS X Preferences if you're on OS X)

[SravaniPavuluri]

Hi,
I am getting this error ERror: Error Domain=STTwitterTwitterErrorDomain Code=0 "not recognized." UserInfo=0x7b0c8d90 {NSLocalizedDescription=not recognized.} when I am trying to upload video.
I got Twitter account from my device settings.
Here is my code to upload video:

[_twitter postMediaUploadData:[NSData dataWithContentsOfFile:filePath] fileName:@"Test" uploadProgressBlock:^(NSInteger bytesWritten, NSInteger totalBytesWritten, NSInteger totalBytesExpectedToWrite) {
} successBlock:^(NSDictionary *imageDictionary, NSString *mediaID, NSString *size) {
NSLog(@"Image dictionary: %@", imageDictionary);
NSLog(@"Media ID; %@", mediaID);
NSLog(@"Size; %@", size);
} errorBlock:^(NSError *error) {
NSLog(@"ERror: %@",error);
}];
I am not sure if I am in correct path or not. Please let me know if anything wrong.

Thanks in Advance :)

[nst]

From Twitter API documentation: "Currently, the only type exposed in our entities is photo". So I don't think you can upload videos.

[userIOS]

Hi, I need your help. I'm trying different solutions for days :(

I sign in into twitter in my app, I have the authorization. And everything is OK. In that moment I save oAuthToken, oAuthTokenSecret, username... and all the info that I can with the purpose of don't ask again user for his username/password.

So the next time that user go into the app, I just want to post with the twitter's info that I have saved. But I can't "reconnect" or "reopen" the session.

Please, could anyone help me?? I'm really struggling :/

This is what I'm trying:

STTwitterAPI *twitter = [STTwitterAPI twitterAPIWithOAuthConsumerName:nil
consumerKey:@"xxx"
consumerSecret:@"xxx"];

    [twitter postReverseOAuthTokenRequest:^(NSString *authenticationHeader) {

        STTwitterAPI *twitterAPIOS = [STTwitterAPI twitterAPIOSWithFirstAccount];

        [twitterAPIOS verifyCredentialsWithSuccessBlock:^(NSString *username) {

            [twitterAPIOS postReverseAuthAccessTokenWithAuthenticationHeader:authenticationHeader
                                                                successBlock:^(NSString *oAuthToken,
                                                                               NSString *oAuthTokenSecret,
                                                                               NSString *userID,
                                                                               NSString *screenName) {

                                                                    // I'm trying to POST on twitter HERE

        } errorBlock:^(NSError *error) {
             NSLog(@"-- ERROR1: %@", error);
        }];

    } errorBlock:^(NSError *error) {
         NSLog(@"-- ERROR2: %@", error);
    }];

And the ERROR that I'm getting is the first one that I control:

ERROR1: Error Domain=STTwitterOS Code=0 "This system cannot access Twitter." UserInfo=0x14d06d30 {NSLocalizedDescription=This system cannot access Twitter.}

[userIOS]

Well, I think that the wrong point is when I ask for twitterAPIOSWithFirstAccount. Because I haven't got twitter installed in my phone. So, How could I create an account from the saved info that I have of the first user's authentication??

Thank you in advance!