Facebook Graph API request with ACAccountStore refer to https://gist.github.com/kenshin03/5487487 for the initAccount part

gistfile1.txt

- (void) likeFeed:(NSString*)graphID {
    
    InitAccountSuccessBlock successBlock = ^{
        NSString * likeURLString = [NSString stringWithFormat:@"https://graph.facebook.com/%@/likes", graphID];
        NSURL * feedURL = [NSURL URLWithString:likeURLString];
        
        SLRequest * request = [SLRequest requestForServiceType:SLServiceTypeFacebook requestMethod:SLRequestMethodPOST URL:feedURL parameters:nil];
        NSLog(@"request.URL: %@", request.URL);
        request.account = self.facebookAccount;
        [request performRequestWithHandler:^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error) {
            NSString * responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
            NSLog(@"responseString: %@", responseString);
        }];
    };
    
    if (self.facebookAccount == nil){
        [self initAccount:successBlock];
    }else{
        successBlock();
    }
}