更新：支持群名片更改事件；

examples/CMakeLists.txt

@@ -28,4 +28,5 @@ api_exe(MessageType)
 api_exe(FetchEventsViaHTTP)
 api_exe(GroupMemberInfo)
 api_exe(GroupNameChange)
-api_exe(GroupConfig)
+api_exe(GroupConfig)
+api_exe(MemberCardChange)

examples/MemberCardChange.cpp

@@ -0,0 +1,39 @@
+#include <iostream>
+#include <ctime>
+// 使用静态库必须要在引入 mirai.h 前定义这个宏
+#define MIRAICPP_STATICLIB
+#include <mirai.h>
+
+int main()
+{
+	using namespace std;
+	using namespace Cyan;
+	system("chcp 65001");
+	MiraiBot bot("127.0.0.1", 539);
+	while (true)
+	{
+		try
+		{
+			bot.Auth("INITKEY7A3O1a9v", 1589588851_qq);
+			break;
+		}
+		catch (const std::exception& ex)
+		{
+			cout << ex.what() << endl;
+		}
+		MiraiBot::SleepSeconds(1);
+	}
+	cout << "成功登录 bot。" << endl;
+
+
+	// 由于服务器并不会告知名片变动, 此事件只能由 mirai 在发现变动时才广播. 不要依赖于这个事件.
+	bot.On<MemberCardChangeEvent>(
+		[&](MemberCardChangeEvent e)
+		{
+			cout << e.Member.MemberName << "(" << e.Member.QQ.ToInt64() << ") 的群名片被修改了" << endl;
+			cout << e.OriginName << ", " << e.CurrentName << endl;
+		});
+
+	bot.EventLoop();
+	return 0;
+}

include/events/events.hpp

@@ -19,6 +19,7 @@
 // 群组相关事件
 #include "group_recall_event.hpp"
 #include "group_mute_all_event.hpp"
+#include "member_card_change_event.hpp"
 #include "member_join_request_event.hpp"
 #include "member_join_event.hpp"
 #include "member_leave_kick.hpp"

include/events/member_card_change_event.hpp

@@ -0,0 +1,65 @@
+#pragma once
+#ifndef mirai_cpp_events_member_card_change_hpp_H_
+#define mirai_cpp_events_member_card_change_hpp_H_
+
+#include <nlohmann/json.hpp>
+#include "event_interface.hpp"
+#include "defs/group.hpp"
+#include "defs/group_member.hpp"
+
+namespace Cyan
+{
+	/**
+	 * \brief 群名片修改事件(由于服务器并不会告知名片变动, 此事件只能由 mirai 在发现变动时才广播. 不要依赖于这个事件.)
+	 */
+	class MemberCardChangeEvent : public EventBase
+	{
+	public:
+		string OriginName;
+		string CurrentName;
+		GroupMember_t Member;
+		GroupMember_t Operator;
+
+		static MiraiEvent GetMiraiEvent()
+		{
+			return MiraiEvent::MemberCardChangeEvent;
+		}
+
+		bool OperatorIsBot() const
+		{
+			return operator_is_null_;
+		}
+
+		virtual bool Set(const json& j) override
+		{
+			this->OriginName = j["origin"].get<string>();
+			this->CurrentName = j["current"].get<string>();
+			this->Member.Set(j["member"]);
+			if (!j["operator"].is_null())
+			{
+				this->Operator.Set(j["operator"]);
+				this->operator_is_null_ = false;
+			}
+			return true;
+		}
+		virtual json ToJson() const override
+		{
+			json j = json::object();
+			j["type"] = "MemberCardChangeEvent";
+			j["origin"] = this->OriginName;
+			j["current"] = this->CurrentName;
+			j["member"] = this->Member.ToJson();
+			if (!operator_is_null_)
+				j["operator"] = this->Operator.ToJson();
+			else
+				j["operator"] = nullptr;
+			return j;
+		}
+
+	private:
+		bool operator_is_null_ = true;
+	};
+
+}
+
+#endif // !mirai_cpp_events_member_card_change_hpp_H_

include/events/mirai_event.hpp

@@ -35,7 +35,8 @@ namespace Cyan
 		BotLeaveEventActive,					// Bot 主动离开群
 		BotLeaveEventKick,					// Bot 被剔出群
 		Message,								// 通用消息事件
-		BotInvitedJoinGroupRequestEvent		// Bot被邀请入群申请
+		BotInvitedJoinGroupRequestEvent,		// Bot被邀请入群申请
+		MemberCardChangeEvent				// 群成员群名片被修改事件
 	};
 
 	inline MiraiEvent MiraiEventStr(const std::string& miraiEvent)
@@ -65,6 +66,7 @@ namespace Cyan
 		if (miraiEvent == "GroupNameChangeEvent") return MiraiEvent::GroupNameChangeEvent;
 		if (miraiEvent == "GroupMuteAllEvent") return MiraiEvent::GroupMuteAllEvent;
 		if (miraiEvent == "BotInvitedJoinGroupRequestEvent") return MiraiEvent::BotInvitedJoinGroupRequestEvent;
+		if (miraiEvent == "MemberCardChangeEvent") return MiraiEvent::MemberCardChangeEvent;
 		return MiraiEvent::Default;
 	}
 
@@ -133,6 +135,9 @@ namespace Cyan
 		case Cyan::MiraiEvent::BotInvitedJoinGroupRequestEvent:
 			result = "BotInvitedJoinGroupRequestEvent";
 			break;
+		case Cyan::MiraiEvent::MemberCardChangeEvent:
+			result = "MemberCardChangeEvent";
+			break;
 		default:
 			result = "Default";
 			break;