Facebook iOS SDK 4.x中没有FBSession

Question

FBSession新的Facebook iOS SDK v4.x中没有更多课程.如何确定用户是否已登录？提前致谢.

Answer 1

Vincent是对的,检查[FBSDKAccessToken currentAccessToken]以确定用户是否已登录.

Answer 2

要检查用户是否已登录,如果是,请导航到另一个视图:

if ([FBSDKAccessToken currentAccessToken]) {
    // User is logged in
    [self performSelector:@selector(accessGrantedNavigation)
               withObject:nil afterDelay:0.0];
}

-(void)accessGrantedNavigation{
    [self performSegueWithIdentifier: @"segueLoginFB" sender: self];
}

要注销:(虽然它不允许更改FB用户.我认为这是因为Safari已经负责该会话并且仍然是同一个用户.)

FBSDKLoginManager *manager = [[FBSDKLoginManager alloc] init];
    [manager logOut];

希望能帮助到你.