iphone development: cannot open active Facebook session with publish permission - iphone

Question

In my app I want to post a image on my wall however I think i miss something. I did lots of research and end up with that code. Actually it sometimes working but generally when the code is running since there is no session with publish_action permission, second part of the code is working but the problem is I always get error log at the second part, so I cant proceed...Do you have any idea why I cant open active session with publish permissions?
if ([[FBSession activeSession]isOpen]) {
/*
* if the current session has no publish permission we need to reauthorize
*/
if ([[[FBSession activeSession]permissions]indexOfObject:#"publish_actions"] == NSNotFound) {
[[FBSession activeSession] requestNewPublishPermissions:[NSArray arrayWithObject:#"publish_action"] defaultAudience:FBSessionDefaultAudienceOnlyMe
completionHandler:^(FBSession *session,NSError *error){
action();
}];
}else{
[self publishStory];
}
}else{
/*
* open a new session with publish permission
*/
[FBSession openActiveSessionWithPublishPermissions:[NSArray arrayWithObject:#"publish_actions"]
defaultAudience:FBSessionDefaultAudienceOnlyMe
allowLoginUI:YES
completionHandler:^(FBSession *session, FBSessionState status, NSError *error) {
if (!error && status == FBSessionStateOpen) {
[self publishStory];
}else{
NSLog(#"error");
}
}];
}

Answer 1

In the first part of the code when you are requesting new publish permissions you have
[NSArray arrayWithObject:#"publish_action"] ....
If i am not not mistaken I think that should be [NSArray arrayWithObject:#"publish_actions"]
Here is code snip from facebook docs
https://developers.facebook.com/docs/technical-guides/iossdk/errors/
// Method that requests permissions needed to make the API call.
- (void)requestPermissionCallAPI {
[FBSession.activeSession
requestNewPublishPermissions:[NSArray arrayWithObject:#"publish_actions"]
defaultAudience:FBSessionDefaultAudienceEveryone
completionHandler:^(FBSession *session, NSError *error) {
if (error) {
// Handle new permissions request errors
[self handleRequestPermissionError:error];
} else {
// Make API call
...
}
}];
}