Facebook Graph API for pages using iOS SDK - ios

Question

I'm trying to retrieve the conversations that the page had with it's users/visitors. I was able to retrieve the conversations for the page using the below call. I do have the right page access token in the 'pgAccessToken' variable.
NSMutableDictionary *params = [[NSMutableDictionary alloc] init];
[params setObject:pgAccessToken forKey:#"access_token"];
[params setObject:#"fields" forKey:#"fields"];
FBSDKGraphRequest *request = [[FBSDKGraphRequest alloc]
initWithGraphPath:#"/{page-id}/conversations"
parameters:nil tokenString:pgAccessToken
version:nil HTTPMethod:#"GET"];
[request startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error) {
NSLog(#"Output : %#", result);
}];
I was able to receive a list of conversations.
{
"data": [
{
"created_time": "2015-12-12T02:24:21+0000",
"id": "m_mid.1449888061289:b3ec94g1ec0729d776"
},
{
"created_time": "2015-12-12T02:23:08+0000",
"id": "m_mid.1449887988645:94905084ecfdf89812"
}
],
"paging": {
"previous": "https://graph.facebook.com/v2.5/t_mid.1448167619182:200955bd99614aa136/messages?format=json&access_token={MYACCESSTOKEN}&limit=25&since=1449887061&__paging_token={MYPAGINGTOKEN}&__previous=1",
"next": "https://graph.facebook.com/v2.5/t_mid.1448167619182:2009335d99614aa136/messages?format=json&access_token={MYACCESSTOKEN}&limit=25&until=1448167619&__paging_token={MYPAGINGTOKEN}"
}
}
Now I'm trying to receive messages in the conversation. Which I can get by hitting the node '{conversation-id}/messages' but it just gives me a timestamp and message id as part of the response.
What I want is not just the time stamp and message id, but instead the from, to and message contents. I tried the Graph API Explorer but it would still return the same data when I use the following different nodes.
/{conversation-id}/messages
/{message-id}
Can any one help ?
++++UPDATE++++
FIGURED IT OUT. PASTED BELOW IS THE ANSWER IF SOMEBODY ELSE COMES ACROSS THE SAME ISSUE.
Finally figured this out after a few tries with Graph API Explorer tool on facebook developer page.
The way to get more fields is by supplying the fields I wanted in addition to the default that were being sent to me.
NSString *pgAccessToken = [[NSUserDefaults standardUserDefaults] objectForKey:#"PAGE_ACCESS_TOKEN"]; //I have my page accesstoken stored here.
NSMutableDictionary *params = [[NSMutableDictionary alloc] init];
[params setObject:#"message_count,updated_time,participants,snippet" forKey:#"fields"];
FBSDKGraphRequest *request = [[FBSDKGraphRequest alloc]
initWithGraphPath:#"/{page-id}/conversations"
parameters:params tokenString:pgAccessToken
version:nil HTTPMethod:#"GET"];
__weak MessagesTableViewController *weakSelf = self;
[request startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error) {
NSLog(#"Output : %#", result);
//Process your result here, add to local array, reload table etc.
}];