Release 5.9.1872 @2021.12.20 - Enhanced Edition - 增强版 · TencentCloud/TIMSDK

Added support for sending targeted group messages.
Added support for COS download authentication.
Added support for AES encryption channels of persistent connections.
Added support for access point anti-islanding for the connection logic.
Added support for backend configuration of COS file upload and download concurrence.
Added the option of giving priority to IPv6 in a dual-stack network.
Added the feature of displaying the 20 historical messages before a user joins an audio-video group (AVChatRoom). Users must activate the Flagship Edition package before they can use the feature.
Added support for backend configuration of the maximum number of roaming messages when a user gets historical group messages.
Optimized the description of some error codes.
Fixed the issue where the backend returned Failed for quickly clearing unread messages if there were deleted group conversations in the local storage.
Fixed the issue where when a user sent through RESTful API messages excluded from the unread count, the SDK occasionally failed to clear the unread count when issuing a read report.
Fixed the issue where when a user logged in again after quickly entering or leaving a group through RESTful API during offline, an error occurred occasionally when the user got the joined group list.
Fixed the issue where when a user sent messages excluded from unread count when the recipient is offline, the unread count was occasionally inaccurate after the recipient was online again.

Added support for selecting a country/region on the login page.
Added the feature of clearing initialization operations performed before a user accepts the privacy agreement.

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