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我得到了要执行的代码行-

ACAccountStore *account = [[ACAccountStore alloc] init];
    ACAccountType *accountType = [account accountTypeWithAccountTypeIdentifier:
                                  ACAccountTypeIdentifierTwitter];

    [account requestAccessToAccountsWithType:accountType options:nil
                                  completion:^(BOOL granted, NSError *error)
    {
        if (granted == YES)
        {
            NSArray *arrayOfAccounts = [account
                                        accountsWithAccountType:accountType];

            if ([arrayOfAccounts count] > 0)
            {
                ACAccount *twitterAccount = [arrayOfAccounts lastObject];

                NSDictionary *message = @{@"status": @"My First Twitter post from iOS6"};

                NSURL *requestURL = [NSURL
                                     URLWithString:@"http://api.twitter.com/1/statuses/update.json"];

                SLRequest *postRequest = [SLRequest
                                          requestForServiceType:SLServiceTypeTwitter
                                          requestMethod:SLRequestMethodPOST
                                          URL:requestURL parameters:message];

                postRequest.account = twitterAccount;

                [postRequest performRequestWithHandler:^(NSData *responseData,
                                                         NSHTTPURLResponse *urlResponse, NSError *error)
                 {
                     NSLog(@"Twitter HTTP response: %i", [urlResponse 
                                                          statusCode]);
                 }];
            }
        }
    }];

当我将帐户类型对象传递给accountsWithAccountType:方法时,我得到了一个空数组。当我开始调试此代码时,我得到了以下帐户类型对象的描述。

accountType的打印说明:

标识符:com.apple.twitter

描述:推特

对象ID:x-coredata://C4E0FB79-AAAF-4E87-92AD-C80137717067/AccountType/p25

支持认证 YES

支持MultipleAccounts 是

支持的数据类(空)

同步数据类(空)

我有什么遗漏吗?请帮我解决这个问题。提前致谢。

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