Facebook App Invite "FBSDKAppInviteContent" not recognized

I am currently trying to implement Facebook's new "App Invites for iOS". I'm using Objective C and I have added the following frameworks:

• Bolts.framework


• FBSDKCoreKit.framework


• FacebookSDK.framework

I have also imported <FBSDKCoreKit/FBSDKCoreKit.h> and <FacebookSDK/FacebookSDK.h>. It's like the code isn't recognized, why? I get the following errors:

What do I need to do so that I can use FBSDKAppInviteContent. Also, is there a special URL or PHP/JS equivalent?