Error migrating existing OAuth credentials to ACAccountStore

问题

I'm having problems migrating existing OAuth credentials to ACAccountStore in iOS 5.

ACAccountStore *accountStore = [[ACAccountStore alloc] init];
ACAccountType *accountType = [accountStore accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierTwitter];
ACAccount *account = [[ACAccount alloc] initWithAccountType:accountType];
ACAccountCredential *credential = [[ACAccountCredential alloc] initWithOAuthToken:savedToken tokenSecret:savedSecret];
[account setCredential:credential];
[accountStore saveAccount:account withCompletionHandler:^(BOOL success, NSError *error) {
    if (error) {
        NSLog(@"error saving account: %@", error.description);
    }

    NSLog(@"saved account? %d", success);
}];

The end result being:

2011-10-17 19:09:32.927 League[13731:1b803] error saving account: Error Domain=NSURLErrorDomain Code=-1012 "The operation couldn’t be completed. (NSURLErrorDomain error -1012.)"
2011-10-17 19:09:32.927 League[13731:1b803] saved account? 0

回答1:

This error message is caused by using an incorrect token/secret combination. I was incorrectly trimming the user_id prefix off of the OAuth token.

来源：https://stackoverflow.com/questions/7800675/error-migrating-existing-oauth-credentials-to-acaccountstore