FBSDKGraphRequest in a bolts framework never calls block

Question

I have the following code:

[[[PFFacebookUtils logInInBackgroundWithAccessToken:[FBSDKAccessToken currentAccessToken]] continueWithSuccessBlock:^id(BFTask *task) {

    PFUser *user = task.result;

    return user;

}] continueWithSuccessBlock:^id(BFTask *task) {

    BFTaskCompletionSource *source = [BFTaskCompletionSource taskCompletionSource];

    FBSDKGraphRequest *request = [[FBSDKGraphRequest alloc] initWithGraphPath:@"me" parameters:nil];

    [request startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error) {

        if (error) {
            [source setError:error];
            return;
        }

        [source setResult:result];
    }];

    return source.task;
}];

The FBSDKGraphRequest works fine outside of the Bolts task, but inside the task the startWithCompletionHandler is not being called.

Any ideas?

Answer 1

I found a workaround. Just wrap it within a main thread block. It will work like a charm.

dispatch_async(dispatch_get_main_queue(), ^{
    FBSDKGraphRequest *request = [[FBSDKGraphRequest alloc] initWithGraphPath:@"me" parameters:nil];

    [request startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error) {

        if (error) {
            [source setError:error];
            return;
        }

        [source setResult:result];
    }];
});

Answer 2

We had the same exact issue and we used the same solution but I can not seem to find any posts which explain why this is happening.