There is no more class FBSession
in new Facebook iOS SDK v4.x. How can I find out whether user is logged in or not now? Thanks in advance.
Vincent是对的,检查[FBSDKAccessToken currentAccessToken]以确定用户是否已登录。
To check if the user logged in and if so, navigate to another view:
if ([FBSDKAccessToken currentAccessToken]) {
// User is logged in
[self performSelector:@selector(accessGrantedNavigation)
withObject:nil afterDelay:0.0];
}
-(void)accessGrantedNavigation{
[self performSegueWithIdentifier: @"segueLoginFB" sender: self];
}
To log out: (although it doesn't allow to change FB user. I think it is because Safari already takes care of that session and remains the same user.)
FBSDKLoginManager *manager = [[FBSDKLoginManager alloc] init];
[manager logOut];
Hope it helps.
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