Publish Feed with SSO in Facebook (IOS) - iphone

Question

I am working on Facebook integration and trying for Single Sign-On with publish feed functionality.
I am using latest FacebookSDK. I have Facebook's Hackbook example code but, i am new to all this so it is being difficult to understand completely all this things.
While searching on SSO i got some code, It is working fine. Here is the code i am using (At the end of this page there is a source code attached)
FBUtils.h and FBUtils.m class
ViewController.m
- (IBAction)publishFeed:(id)sender {
//For SSO
[[FBUtils sharedFBUtils] initializeWithAppID:#"3804765878798776"];
NSArray *permision = [NSArray arrayWithObjects:#"read_stream",#"publish_stream", nil];
[[FBUtils sharedFBUtils] LoginWithPermisions:permision];
[FBUtils sharedFBUtils].delegate = self;
FBSBJSON *jsonWriter = [FBSBJSON new];
/// for publishfeed
NSArray* actionLinks = [NSArray arrayWithObjects:[NSDictionary dictionaryWithObjectsAndKeys:
#"Get Started",#"name",#"https://itunes.apple.com?ls=1&mt=8",#"link", nil], nil];
NSString *actionLinksStr = [jsonWriter stringWithObject:actionLinks];
// Dialog parameters
NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
#"I have lot of fun preparing.", #"name",
#" exam", #"caption",
#" ", #"description",
#"https://itunes.apple.com", #"link",
#"http://mypng", #"picture",
actionLinksStr, #"actions",
nil];
AppDelegate *delegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
[[delegate facebook] dialog:#"feed"
andParams:params
andDelegate:self];
When i tap Facebook button in my app it is redirect me to Facebook and then retuning back to my app. Now , what i want is to fire publishFeed event right after returning back to the app and it should ask direct for post or cancel options to the user. But it is asking for login again like this.
Can any one help me in this or please suggest me the right way.
Your Suggestions would be a great help.

Answer 1

In your method, you're not checking if the app has permissions to publish post and if the user logged in before. So, every time you call this method, the app wants you to login. I think that is the problem.
If I'm right, you need to add permission and login control in your method like this. This is my sample code from another project, you can get the logic behind it.
- (IBAction)facebookShare:(id)sender
{
AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
// You check the active session here.
if (FBSession.activeSession.isOpen)
{
// You check the permissions here.
if ([FBSession.activeSession.permissions
indexOfObject:#"publish_actions"] == NSNotFound) {
// No permissions found in session, ask for it
[FBSession.activeSession
reauthorizeWithPublishPermissions:
[NSArray arrayWithObject:#"publish_actions"]
defaultAudience:FBSessionDefaultAudienceFriends
completionHandler:^(FBSession *session, NSError *error) {
if (!error) {
// If permissions granted, publish the story
[self postFacebook];
[[[UIAlertView alloc] initWithTitle:#"Result"
message:#"Posted in your wall."
delegate:self
cancelButtonTitle:#"OK"
otherButtonTitles:nil]
show];
}
}];
} else {
// If permissions present, publish the story
[self postFacebook]; // ------> This is your post method.
[[[UIAlertView alloc] initWithTitle:#"Sonuç"
message:#"Duvarında paylaşıldı."
delegate:self
cancelButtonTitle:#"Tamam"
otherButtonTitles:nil]
show];
}
}
else
{
// If there is no session, ask for it.
[appDelegate openSessionWithAllowLoginUI:YES];
}
// NSLog(#"Post complete.");
}