Facebook Wall Post just after Facebook Signup iOS- facebook SDK 3.2 - iphone

Question

Facebook SDK 3.2
I need to post a wall post on facebook just after sign-in with faceboook.
Here is the Code i am using:
Here i have a opened the Session For Facebook:
- (IBAction)FBSignup:(id)sender {
[[AppDelegate sharedObject] openSession:^(FBSession *session, FBSessionState state, NSError *error) {
[self sessionStateChanged:session state:state error:error];
}];
}
On State Change, I am populating Data with [self populateUserDetails] and then trying to post on facebook wall as well with [self postOnFB] but there is no post on facebook wall.
- (void)sessionStateChanged:(FBSession *)session
state:(FBSessionState) state
error:(NSError *)error
{
switch (state) {
case FBSessionStateOpen:
[self populateUserDetails];
[self postOnFB];
break;
case FBSessionStateClosed:
case FBSessionStateClosedLoginFailed:
[FBSession.activeSession closeAndClearTokenInformation];
break;
default:
break;
}
[[NSNotificationCenter defaultCenter]
postNotificationName:SCSessionStateChangedNotification
object:session];
if (error) {
UIAlertView *alertView = [[UIAlertView alloc]
initWithTitle:#"Error"
message:error.localizedDescription
delegate:nil
cancelButtonTitle:#"OK"
otherButtonTitles:nil];
[alertView show];
}
}
Here i am populting data with the facebook user object where i need to.
- (void)populateUserDetails
{
if (FBSession.activeSession.isOpen) {
[[FBRequest requestForMe] startWithCompletionHandler:
^(FBRequestConnection *connection, NSDictionary<FBGraphUser> *user, NSError *error) {
if (!error) {
///////////////////////////////
// Populating Data Where Needed
///////////////////////////////
// [self postOnFB];
}
}];
}
}
Here i try to post the wall post with [self postOnFB] it gives error:
Terminating app due to uncaught exception
'com.facebook.sdk:InvalidOperationException', reason: 'FBSession: It
is not valid to reauthorize while a previous reauthorize call has not
yet completed.
Here i am posting to the wall.
- (void)postOnFB{
// Ask for publish_actions permissions in context
if ([FBSession.activeSession.permissions
indexOfObject:#"publish_actions"] == NSNotFound) {
// No permissions found in session, ask for it
[FBSession.activeSession requestNewPublishPermissions:[NSArray arrayWithObject:#"publish_actions"]
defaultAudience:FBSessionDefaultAudienceFriends
completionHandler:^(FBSession *session, NSError *error) {
if (!error) {
[self fbPostSettings];
}
}];
} else {
// If permissions present, publish the story
[self fbPostSettings];
}
}
setting parameters for facebook wall post:
- (void)fbPostSettings{
NSDictionary * facebookParams = [[NSMutableDictionary alloc] initWithObjectsAndKeys:
kFacebookPostLink, #"link",
kFacebookPostImage, #"picture",
kFacebookPostName, #"name",
kFacebookPostCaption, #"caption",
kFacebookPostDescription, #"description",
nil];
[FBRequestConnection startWithGraphPath:#"me/feed"
parameters:facebookParams
HTTPMethod:#"POST"
completionHandler:^(FBRequestConnection *connection,
id result,
NSError *error) {
NSString *alertText;
if (error) {
alertText = [NSString stringWithFormat:
#"error: domain = %#, code = %d",
error.domain, error.code];
} else {
alertText = [NSString stringWithFormat:
#"Posted action, id: %#",
[result objectForKey:#"id"]];
}
NSLog(#"%#",alertText);
}];
}
- (void)sessionStateChanged:(NSNotification*)notification {
[self populateUserDetails];
}
If i call postOnFB on some button action selector (after completion of data population through facebook user object), it post fine on the wall. But i need to post it just after i get the user object in startWithCompletionHandler:
^(FBRequestConnection *connection, NSDictionary *user, NSError *error) method.
Please help. Thank you everyone :)

Answer 1

Instead of opening session and then requesting publish permissions, directly ask for publish permissions to open the session
[FBSession openActiveSessionWithPublishPermissions:[NSArray arrayWithObjects:#"publish_stream",
nil] defaultAudience:FBSessionDefaultAudienceEveryone allowLoginUI:YES completionHandler:^(FBSession *session,
FBSessionState state, NSError *error) {
if (FBSession.activeSession.isOpen && !error) {
[self fbPostSettings];
}];