Run Demo

using Com.Tencent.IM.Unity.UIKit;
using com.tencent.imsdk.unity;
using com.tencent.imsdk.unity.types;
using com.tencent.imsdk.unity.enums;
namespace Com.Tencent.IM.Unity.UIKit{
    public static void Init() {
      string SDKAppID = ""; // Get the `SDKAppID` from the Chat console
      SdkConfig sdkConfig = new SdkConfig();
    
      sdkConfig.sdk_config_config_file_path = Application.persistentDataPath + "/TIM-Config";
    
      sdkConfig.sdk_config_log_file_path = Application.persistentDataPath + "/TIM-Log";
    
      TIMResult res = TencentIMSDK.Init(long.Parse(SDKAppID), sdkConfig);
    }
}


public static void Login() {
  if (userid == "" || user_sig == "")
  {
      return;
  }
  TIMResult res = TencentIMSDK.Login(userid, user_sig, (int code, string desc, string json_param, string user_data)=>{
    // Process the login callback logic
  });
}

public static void MsgSendMessage() {
        string conv_id = ""; // The conversation ID of a one-to-one message is the `userID`, and that of a group message is the `groupID`.
        Message message = new Message
        {
          message_conv_id = conv_id,
          message_conv_type = TIMConvType.kTIMConv_C2C, // For a group message, this value is `TIMConvType.kTIMConv_Group`
          message_elem_array = new List<Elem>
          {
            new Elem
            {
              elem_type = TIMElemType.kTIMElem_Text,
              text_elem_content =  "This is an ordinary text message"
            }
          }
        };
        StringBuilder messageId = new StringBuilder(128); // messageId for getting message ID when message is sent

        TIMResult res = TencentIMSDK.MsgSendMessage(conv_id, TIMConvType.kTIMConv_C2C, message, messageId, (int code, string desc,                         string json_param, string user_data)=>{
          // Async message sending result
        });
          // The message ID returned when the message is sent
}

TIMResult res = TencentIMSDK.ConvGetConvList((int code, string desc, List<ConvInfo> info_list, string user_data)=>{
 // Process the async logic
});

// Pull historical one-to-one messages
// Do not set `msg_getmsglist_param_last_msg` for the first pull. It will pull the newest message if not set.
// `msg_getmsglist_param_last_msg` can be the last message in the returned message list for the second pull.
Message LastMessage = null;
string LastMessageID = "";
var get_message_list_param = new MsgGetMsgListParam();
TIMResult res = TencentIMSDK.MsgGetMsgList(conv_id, TIMConvType.kTIMConv_C2C, get_message_list_param, (params object[] parameters) => {
  // handle callback logic
  List<Message> messages = Utils.FromJson<List<Message>>((string)parameters[1]);    
   if (messages.Count > 0){      
    LastMessage = messages[messages.Count - 1];      
    LastMessageID.text = messages[messages.Count - 1].message_msg_id; 
  }else {     
    LastMessage = null;      
    LastMessageID.text = "";    
   }
  
});
// `msg_getmsglist_param_last_msg` can be the last message in the returned message list for the second pull.
var get_message_list_param = new MsgGetMsgListParam
    {
      msg_getmsglist_param_last_msg = LastMessage
    };
TIMResult res = TencentIMSDK.MsgGetMsgList(conv_id, TIMConvType.kTIMConv_Group, get_message_list_param, (int code, string desc, string user_data) => {
  // handle callback logic
});

TencentIMSDK.AddRecvNewMsgCallback((List<Message> message, string user_data) => {
  // Process new messages
});