Unity：通过Facebook SDK获取Facebook电子邮件

Question

I'm using facebook SDK for my app login, and try to access id, name and email. I follow the reference from facebook developer FB.LogInWithReadPermissions

public void FBLogin(){
    FB.LogInWithReadPermissions (new List<string>(){"public_profile","email","user_friends"}, AuthCallback);
}

private void AuthCallback (ILoginResult result) {
    if (FB.IsLoggedIn) {
        // AccessToken class will have session details
        var aToken = Facebook.Unity.AccessToken.CurrentAccessToken;
        // Print current access token's User ID

        // Print current access token's granted permissions
        foreach (string perm in aToken.Permissions) {
            Debug.Log(perm);
        }
        FB.API ("/me?fields=id,name,email",HttpMethod.GET, GetFacebookInfo);
    } else {
        Debug.Log("User cancelled login");
    }
}

public void GetFacebookInfo(IResult result){
    if (result.Error == null) {
        Debug.Log (result.ResultDictionary ["id"].ToString ());
        Debug.Log (result.ResultDictionary ["name"].ToString ());
        Debug.Log (result.ResultDictionary ["email"].ToString ());
    } else {
        Debug.Log (result.Error);
    }
}

Error I get in Debug.Log (result.ResultDictionary ["email"].ToString ());

KeyNotFoundException: The given key was not present in the dictionary.

Did I miss something ? How can I able to get the email. Thanks a lot.

Answer 1

Try to change the line

    FB.API ("/me?fields=id,name,email",HttpMethod.GET, GetFacebookInfo);

into

        FB.API ("/me?fields=id,name,email", HttpMethod.GET, GetFacebookInfo, new Dictionary<string, string> () { });

I remember having the same error and it worked for me.

Answer 2

If you are using a test user, then you must add the 'email' permission to the test user.

Go to 'facebook for developers' and select your app ('Wizard's Run' for me):

Then go to 'Test Users'

Then go to the user that you want to test with and select 'Change permissions this test user granted to app'

If 'email' isn't already listed, then enter 'email' and Update.