tencent cloud

// 1. Set the listener
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Listen for push notifications
    [V2TIMManager.sharedInstance setAPNSListener:self];
    // Listen for unread conversation counts
    [[V2TIMManager sharedInstance] setConversationListener:self];
    return YES;
}

// 2. Save the unread count after it changes
- (void)onTotalUnreadMessageCountChanged:(UInt64)totalUnreadCount {
    self.unreadNumber = totalUnreadCount;
}

// 3. Report custom-defined unread count after the app is pushed to the background
/** After the application enters the background, customize the app's unread count. If not handled, the default app unread count is the sum of all conversation unread counts
 *  <pre>
 *
 *   - (uint32_t)onSetAPPUnreadCount {
 *       return 100;  // Custom-defined unread count
 *   }
 *
 *  </pre>
 */
- (uint32_t)onSetAPPUnreadCount {
    // 1. Get the custom-defined badge
    uint32_t customBadgeNumber = ...
    
    // 2. Add the IM message unread count
    customBadgeNumber += self.unreadNumber;
    
    // 3. Report to the IM server via IMSDK
    return customBadgeNumber;
}

let onTotalUnreadMessageCountUpdated = function(event) {
  const unreadCount = event.data; // Total unread count of the current session
  plus.runtime.setBadgeNumber(unreadCount); // Set the badge number
};
chat.on(TencentCloudChat.EVENT.TOTAL_UNREAD_MESSAGE_COUNT_UPDATED, onTotalUnreadMessageCountUpdated);