问题
I've been asked to implement sign in with Google so that users with Gmail accounts have an easier time signing in. In my research I found this time table that suggests that it's a better idea to implement sign in with Google Plus. Does that mean that
1) sign in with Google(with out having a google plus account) is going away?
2) users that do not have a Google plus account are forced to sign up to use new sign in with Google auth system?
"If your app authenticates users by any means other than the Google+ Sign-In button, we recommend you switch your app to Google+ Sign-In"
回答1:
The Google+ icon is a bit misleading, but I believe you do not need to have a Google+ profile for login.
According to this article, "Google+ Sign-In works for all users with a Google account, whether or not they have upgraded to Google+".
So this should answer your questions that sign in with Google without having a + account is not going away. Additionally, user will not be forced to sign up using the new sign in.
I added the google-plus tag to your question for more visibility.
Hope this helps!
来源：https://stackoverflow.com/questions/25813666/is-sign-in-with-google-being-replaced-with-sign-in-with-google