How to check if a user likes a page?

Question

I want to check if the user has liked my page or not. Here, I initialise the request for a list of likes the user has...

NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];

if ([defaults objectForKey:@"FBAccessTokenKey"] && [defaults objectForKey:@"FBExpirationDateKey"])
{
    [self.facebook setAccessToken:[defaults objectForKey:@"FBAccessTokenKey"]];
    [self.facebook setExpirationDate:[defaults objectForKey:@"FBExpirationDateKey"]];
}

if (![self.facebook isSessionValid])
{
    [self.facebook authorize:[[NSArray alloc] initWithObjects:@"publish_stream, user_likes", nil]];
}
else
{
[self.facebook requestWithGraphPath:@"me/likes" andParams:nil andHttpMethod:@"POST" andDelegate:self];    
}

The code executes to requestWithGraphPath. However it never works, I get "The operation couldn’t be completed. (facebookErrDomain error 10000.)".

Why are you POSTing to /me/likes? – Igy Jun 03 '12 at 15:59 — Igy, Jun 03 '12 at 15:59
Because I don't know how to do it... – ABCD Jun 04 '12 at 11:31 — ABCD, Jun 04 '12 at 11:31

score 6 · Accepted Answer · edited May 23 '17 at 12:30

You need a get request to for likes not a POST so your problem I think is here:

[self.facebook requestWithGraphPath:@"me/likes" andParams:nil andHttpMethod:@"POST" andDelegate:self];

this needs to be:

[self.facebook requestWithGraphPath:@"me/likes" andParams:nil andHttpMethod:@"GET" andDelegate:self];

This will give you the full list of likes. If you want to find a single like, however, it looks like you'll have to do an FQL query to:

https://api.facebook.com/method/fql.query?query=SELECT+user_id%2Cobject_id%2C+post_id+FROM+like+WHERE+user_id%3Dme%28%29%20and%20object_id=<OBJECT_ID_TO_CHECK>&access_token=<YOUR_ACCESS_TOKEN>

Execute this through the iOS SDK like this mentions: https://stackoverflow.com/a/6372236 and if you get anything back the user has liked it. Let me know if this helps. Thanks!

Edit: You actually can do a single query with the graph api. It's like this:

https://graph.facebook.com/me/likes/<OBJECT_ID>

So just plop your object id into the request:

[self.facebook requestWithGraphPath:@"me/likes/<OBJECT_ID>" andParams:nil andHttpMethod:@"GET" andDelegate:self];

and you should be good.

How to check if a user likes a page?

1 Answers1