Objective-c facebook graph api pagination - ios

Question

I'm developing an iOS app that includes a facebook feed of a users wall. Using the graph api with the following URL:
feedURL = [NSString stringWithFormat:#"https://graph.facebook.com/%#/feed?
access_token=%#&since=%#&until=%#",kFaceBookID,FBSession.activeSession.accessToken,
[dateRange objectForKey:#"since"], [dateRange objectForKey:#"until"]];
I get back data that only one result and a dictionary entry for paging. When I do a NSURLRequest with the "next" URL I get back 0 results. If I cut and paste that same URL into a web browser I get back 25 results. Any ideas on why?
Here is the code I am using:
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSString *nextPageURL;
NSError *jsonError;
if (!jsonError) {
NSDictionary *rDict = [NSJSONSerialization JSONObjectWithData:_postData
options:0
error:&jsonError];
nextPageURL = [[rDict objectForKey:#"paging"]objectForKey:#"next"];
NSArray *rArray = [rDict objectForKey:#"data"];
DLog(#"Posts Dictionary = %#\n\n",rDict);
for (NSDictionary *rPost in rArray) {
FBPost *post = [[FBPost alloc]initFBPostWithDictionary:rPost];
[feedsArray addObject:post];
}
}
else
{
ALog(#"json error = %#",[jsonError localizedDescription]);
[activity stopAnimating];
NSString *errorMessage = [NSString stringWithFormat:#"Facebook status request failed with error: %#\nCheck your network connection and try again later",[jsonError localizedDescription]];
[self quit:errorMessage];
}
[feedsTable reloadData];
if (nextPageURL && [feedsArray count] < 30) {
DLog(#"Next Feed URL = %#",nextPageURL);
NSURLRequest *request = [NSURLRequest requestWithURL: [NSURL URLWithString:nextPageURL]];
if (![[NSURLConnection alloc] initWithRequest:request delegate:self]) {
ALog(#"Connection failed for request: %#",request);
}
}
}

Answer 1

I am answering my own question as I took another look at the entire logic and completely changed my approach to use [FBRequestConnection...] instead. Here is the code if anyone is interested. Note that I fetch one weeks worth of feed messages at a time to improve the tableview performance.
- (void) fetchFBFeedsForDateRange:(NSDictionary *)dateRange;
{
_postData = [[NSMutableData alloc]init];
//since, until is a decremented one week at a time date range.
NSDictionary *params = [NSDictionary dictionaryWithObjectsAndKeys:
[dateRange objectForKey:#"since"], #"since",
[dateRange objectForKey:#"until"], #"until",
nil];
NSString *gPath = [NSString stringWithFormat:#"%#/feed",kFaceBookID];
[FBRequestConnection startWithGraphPath:gPath
parameters:params
HTTPMethod:#"GET"
completionHandler:^(FBRequestConnection *connection, id result, NSError *error) {
if (!error) {
NSArray *rArray = [result objectForKey:#"data"];
//DLog(#"Posts Array = %#\n\n",rArray);
for (NSDictionary *rPost in rArray) {
FBPost *post = [[FBPost alloc]initFBPostWithDictionary:rPost];
if (post.type) {
if (!post.skip) {
[feedsArray addObject:post];
}
}
}
[feedsTable reloadData];
if ([feedsArray count] < kFaceBookMaxPostsToDisplay) {
[self performSelector:#selector(fetchPreviousWeek)];
}
else
{
[activity stopAnimating];
}
}
else
{
[activity stopAnimating];
NSString *errorMessage = [NSString stringWithFormat:#"Facebook status request failed with error: %#\nCheck your network connection and try again later",[error localizedDescription]];
[self quit:errorMessage];
}
}];
}