Today we are announcing version 1.4.0 of the Google+ iOS SDK. Google+ iOS Announces Version 1.4.0 SDK With In-App Share & ID Token [googleplusplatform.blogspot.com]

In-app share box. Now your users can share with their Google+ circles, directly from your iOS app! In addition, the native in-app share box supports image and video attachments. If you've already implemented browser-based sharing, you can switch to the native in-app share box with a single line change:

2. ID token support. ID tokens allow you to securely verify the identity of users of your iOS clients to your application servers.