ios Facebook login without open App

ios Facebook login without open App

I'm using this code to log a user in my app with facebook.
AppDelegate *appDelegate = (AppDelegate *)[[UIApplication
sharedApplication] delegate];
if (!appDelegate.session.isOpen) {
// create a fresh session object
appDelegate.session = [[FBSession alloc] init];
// if we don't have a cached token, a call to open here would cause UX
for login to
// occur; we don't want that to happen unless the user clicks the
login button, and so
// we check here to make sure we have a token before calling open
if (appDelegate.session.state == FBSessionStateCreatedTokenLoaded) {
// even though we had a cached token, we need to login to make the
session usable
[appDelegate.session openWithCompletionHandler:^(FBSession *session,
FBSessionState
status,
NSError *error) {
// we recurse here, in order to update buttons and labels
}];
}
}
and
// get the app delegate so that we can access the session property
AppDelegate *appDelegate = (AppDelegate *)[[UIApplication
sharedApplication] delegate];
// this button's job is to flip-flop the session from open to closed
if (appDelegate.session.isOpen) {
// if a user logs out explicitly, we delete any cached token
information, and next
// time they run the applicaiton they will be presented with log in UX
again; most
// users will simply close the app or switch away, without logging
out; this will
// cause the implicit cached-token login to occur on next launch of
the application
[appDelegate.session closeAndClearTokenInformation];
} else {
if (appDelegate.session.state != FBSessionStateCreated) {
// Create a new, logged out session.
appDelegate.session = [[FBSession alloc] init];
}
// if the session isn't open, let's open it now and present the login
UX to the user
[appDelegate.session openWithCompletionHandler:^(FBSession *session,
FBSessionState status,
NSError *error) {
// and here we make sure to update our UX according to the new
session state
}];
}
This code works correctly, but it always open the facebook app (or safari
facebook login if i haven't the app installed) to made the login. There is
a way to do a login from my app using only the fb account registered in
the phone settings?