Parse.com-使用Fb身份验证时更新PFUser的电子邮件

Question

I'm receiving PFUser properly while log in or sign up through Facebook. My permission array:

NSArray *permissionsArray = @[ @"user_about_me",@"email"];

In Parse Data browser, I can see that a user got created with some long string username and proper authData etc. But email field is still empty.

Do I need to make separate call to fill email field for the newly created PFUser ? If Yes then what are the proper steps.

Another question, how forgot password mechanism work for facebook authenticated user in Parse.com ? Do I need to fill email value first by calling graph api and then use that email address for forgot password feature ?

Answer 1

You need to make a separate call to fill the email attribute. Once the user is authenticated, you can call the startForMeWithCompletionHandler: method of FBRequestConnection class to get the user info and then save it to the current user. Your calls should look like this:

NSArray *permissionsArray = @[ @"user_about_me",@"email"];
[PFFacebookUtils logInWithPermissions:permissionsArray block:^(PFUser *user, NSError *error) {
    if (!error && user) {
        [FBRequestConnection startForMeWithCompletionHandler:^(FBRequestConnection *connection, id result, NSError *error) {
            if (!error) {
                [[PFUser currentUser] setObject:[result objectForKey:@"email"]
                                         forKey:@"email"];
                [[PFUser currentUser] saveInBackground];
            }
        }];
    }
}];

About the forgot password for Facebook users, it doesn't make sense since if the user forgot the password, it should change it on Facebook. But, if you call requestPasswordResetForEmail: method, it would send instructions for changing the password to the user since the email exists. Take into account that the logInWithUsername:password: uses the attribute username to log in the user, not the email, and that value it is probably unknown for Facebook users in your app.