iOS 6 SDK SLRequest returning '400' - iphone

Question

Let me make this clear. I am NOT using the Facebook SDK. I'm using iOS SDK's Social.framework, and ACAccountStore to access Facebook accounts, and post with it/them.
I use the same code to post on Twitter. It works 100%. But for some reason regardless of what I do for Facebook integration, I get a "400" error when I try to post.
My method is:
ACAccountStore *account = [[ACAccountStore alloc] init];
ACAccountType *facebookAccountType = [account accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierFacebook];
// Specify App ID and permissions
NSDictionary *options = #{ ACFacebookAppIdKey: #"MY_APP_ID",ACFacebookPermissionsKey: #[#"publish_stream", #"publish_actions"],ACFacebookAudienceKey: ACFacebookAudienceFriends };
[account requestAccessToAccountsWithType:facebookAccountType options:options
completion:^(BOOL granted, NSError *error)
{
if (granted == YES)
{
NSDictionary *parameters = #{#"message": string999};
NSURL *feedURL = [NSURL URLWithString:#"https://graph.facebook.com/me/feed"];
SLRequest *feedRequest = [SLRequest
requestForServiceType:SLServiceTypeFacebook
requestMethod:SLRequestMethodPOST
URL:feedURL
parameters:parameters];
acct.accountType = facebookAccountType;
// Post the request
[feedRequest setAccount:acct];
// Block handler to manage the response
[feedRequest performRequestWithHandler:^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error)
{
if (granted && error == nil) {
} else {
NSLog(#"Facebook response, HTTP response: %i %#", [urlResponse statusCode], [error description]);
[self closeShareMenu];
}
}];
}
}
I don't know where I'm going wrong! It's so annoying! I've set up my app correctly in Facebook Developers and all! Please help -_-'

Answer 1

Following up to the chat session held between #fguchelaar and yours truly yesterday; I was able to ascertain the following solution for this issue.
Add the following in your iOS completion handler:
NSString *temp = [[NSString alloc] initWithData:data encoding: NSUTF8StringEncoding];
NSLog(temp);
//'data' is your 'responseData' (or another object name) that you declare in your completion handler.
This will allow you to see the exact cause of the issue printed to the Debug Console. Now depending on the issue presented, you'll need to grab a Facebook account from the Array of Accounts generated when you call this handler in the iPhone SDK. Not at any prior stage whatsoever, as the Access Token will likely expire and give you this '400' error.
In my case; the error printed was: error:{'400' A valid access token is required… which vastly annoyed me as my prior method to access and check the current Twitter account was working perfectly. And my theory was that it should work just as well for Facebook. Why should the access token be instantaneously revoked if I'm grabbing the account a split second before?
The way I solved my issue (depending on the reason for your error the answer can vary) was to use a for loop to check the newly created array of accounts, with the sole purpose of finding the account there with the same identifier string as the one I saved into NSData/NSKeyedArchiver.
for(ACAccount *a in arrayOfAccounts) {
if([a.identifier isEqualToString:storedAccount.identifier]) {
//set the account to be used
accountToBeUsed = a;
//don't forget to break the For loop once you have your result.
break;
} else {
//This else{} block is not strictly necessary, but here you could set an account if no account was found with a matching identifier.
}
}
For it to work, it's recommended to declare an ACAccount object in your View Controller's .h file, add a #property and #synthesize it, so it can be assigned within the for loop and used after the break; statement.
This effectively solved my whole issue with the '400' error. It was inexplicably frustrating for about six hours of my day, so I hope that my explanation helps anybody who happens to stumble across this issue, and my question here on Stack Overflow :)
Regards,
cocotutch