QuickBlox releases Privacy Lists API for iOS SDK today.
Privacy list API allows to enable or disable communication with other users in a chat. It also enables a user to create, modify, or delete its privacy lists, define a default list.
Now users can block other users. Blocked entities will be receiving an error when try to chat with a user.
Read Privacy Lists documentation for iOS
Download iOS SDK 1.9.2 to start using Privacy Lists API