Q: Google Drive Authentication is going to be expired on April 2016 - iOS Google Drive Login and Sharing 
I have implemented google drive login and sharing with the help of google Example which is given on their official website : https://github.com/googledrive/ios-quickeditor
But after login its showing "this authorization request will be expired on 20 Apr 2017" :

Please provide me alternate solution of this.
I have also created project with new Auth of google but could not able to get code of sharing PDF file with that Auth classes.

A: Try to use GIDSignIn request.Have solved my problems.
Also went to official: https://developers.google.com/identity/sign-in/ios/sign-in and implemented to my Project.Then used scope for GoogleDrive and that way received access to my Google Drive.
As far as I understand GIDSignIn uses singleton to get access to Google services.  that you doesn't need to implement OAuth 2.0 by hands any more.
