Facebook Integration and data fetching not working - ios

Question

I have used the following code to fetch data from the Facebook to my app.
I have did all the other stuff in app delegate and plist.
This sometimes works and fetched data and sometimes don't. Can anyone help me with this. I can't figure what the problem is!
- (IBAction)facebook:(id)sender
{
FBLoginView *loginView=[[FBLoginView alloc]init];
loginView.delegate=self;
loginView.readPermissions = #[#"first_name",
#"last_name",
#"location",
#"id",
#"access_token"];
NSArray* permissions = [NSArray arrayWithObjects: #"email", nil];
loginView.readPermissions=permissions;
[FBSession openActiveSessionWithAllowLoginUI:YES];
[FBRequestConnection
startForMeWithCompletionHandler:^(FBRequestConnection *connection,
id<FBGraphUser> user1,
NSError *error) {
if (!error) {
firstname=user1.first_name;
lastname=user1.last_name;
city=[user1.location objectForKey:#"name"];
email=user1[#"email"];
fbid=user1.id;
Loggedin=#"Y";
[[NSUserDefaults standardUserDefaults]setObject:Loggedin forKey:#"token"];
[[NSUserDefaults standardUserDefaults]synchronize];
}
if (![fbid isEqualToString:#""])
{
[self performSegueWithIdentifier: #"Facebooksegue" sender: self];
}
NSLog(#"%#",firstname);
NSLog(#"%#",lastname);
NSLog(#"%#",city);
NSLog(#"%#",email);
NSLog(#"%#",fbid);
}];
}
My AppDelegate
- (BOOL)application:(UIApplication *)application
openURL:(NSURL *)url
sourceApplication:(NSString *)sourceApplication
annotation:(id)annotation {
// attempt to extract a token from the url
return [FBAppCall handleOpenURL:url sourceApplication:sourceApplication];
}
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
[FBSession class];
return YES;
}

Answer 1

I had a similar situation and I had used almost the same code as you did.
My problem was with the test Facebook id which I had used. I hadn't had it verified so it didn't respond with the email. Try using another account and it might work. If not check whether your app is authorized with the Facebook account synchronized with your account in the settings.
Hope this helps.

Answer 2

Go to the blue project icon at the top left, select your target, go to build settings, find other linker flags, add -ObjC. This will make it so that the entire framework gets statically linked and thus you can reference FBLoginView in the storyboard successfully.