Check Facebook Connect Session on IOS

Question

With the new Facebook library, FBSession object is disappeared. How can i check if user has a valid session on his device immediately when he start the app without prompt to saf

Answer 1

After a successful login, you want to save the access token and expiration date, like this:

[[NSUserDefaults standardUserDefaults] setObject:_facebook.accessToken forKey:@"AccessToken"];
[[NSUserDefaults standardUserDefaults] setObject:_facebook.expirationDate forKey:@"ExpirationDate"];
[[NSUserDefaults standardUserDefaults] synchronize];

Then, when you load the app, you want to check if there is a saved token, like this:

_facebook = [[Facebook alloc] initWithAppId:@"[app_id]"];
_facebook.accessToken    = [[NSUserDefaults standardUserDefaults] stringForKey:@"AccessToken"];
_facebook.expirationDate = (NSDate *) [[NSUserDefaults standardUserDefaults] objectForKey:@"ExpirationDate"];
if (![_facebook isSessionValid]) {
    [_facebook authorize:_permissions delegate:self];
}
else {
    [_facebook requestWithGraphPath:@"me" andDelegate:self];
}

Hope this helps!