tencent cloud

// 群成员 user1 和 user2
List<String> atUserList = new ArrayList<>();
atUserList.add("user1");
atUserList.add("user2");
// 创建群@消息
V2TIMMessage v2TIMMessage = V2TIMManager.getMessageManager().createTextAtMessage(message, atUserList);
// 发送群@消息
V2TIMManager.getMessageManager().sendMessage(v2TIMMessage, null, "toGroupID",  V2TIMMessage.V2TIM_PRIORITY_DEFAULT, false, null,  new V2TIMSendCallback<V2TIMMessage>() {
 @Override
 public void onError(int code, String desc) {
     // 群@消息发送失败
 }
 @Override
 public void onSuccess(V2TIMMessage v2TIMMessage) {
     // 群@消息发送成功
 }
 @Override
 public void onProgress(int progress) {
 }
});

// 创建一条群 @ 消息，@ 群成员 "xixi" 和 "yahaha"
V2TIMMessage *atMsg = [[V2TIMManager sharedInstance] createTextAtMessage:@"这是一条群 @ 文本消息" atUserList:@[@"xixi", @"yahaha"]];
// 发送群 @ 消息
[[V2TIMManager sharedInstance] sendMessage:atMsg receiver:nil groupID:@"groupA" priority:V2TIM_PRIORITY_NORMAL onlineUserOnly:NO offlinePushInfo:nil progress:nil succ:nil fail:nil];

class SendCallback final : public V2TIMSendCallback {
public:
   using SuccessCallback = std::function<void(const V2TIMMessage&)>;
   using ErrorCallback = std::function<void(int, const V2TIMString&)>;
   using ProgressCallback = std::function<void(uint32_t)>;
    SendCallback() = default;
   ~SendCallback() override = default;
    void SetCallback(SuccessCallback success_callback, ErrorCallback error_callback,
                    ProgressCallback progress_callback) {
       success_callback_ = std::move(success_callback);
       error_callback_ = std::move(error_callback);
       progress_callback_ = std::move(progress_callback);
   }
    void OnSuccess(const V2TIMMessage& message) override {
       if (success_callback_) {
           success_callback_(message);
       }
   }
   void OnError(int error_code, const V2TIMString& error_message) override {
       if (error_callback_) {
           error_callback_(error_code, error_message);
       }
   }
   void OnProgress(uint32_t progress) override {
       if (progress_callback_) {
           progress_callback_(progress);
       }
   }
private:
   SuccessCallback success_callback_;
   ErrorCallback error_callback_;
   ProgressCallback progress_callback_;
};
V2TIMStringVector atUserList;
atUserList.PushBack("user1");
atUserList.PushBack("user2");
V2TIMMessage message = V2TIMManager::GetInstance()->GetMessageManager()->CreateTextAtMessage(
   u8"这是一条群 @ 文本消息", atUserList);
auto callback = new SendCallback{};
callback->SetCallback(
   [=](const V2TIMMessage& message) {
       // 群@消息发送成功
       delete callback;
   },
   [=](int error_code, const V2TIMString& error_message) {
       // 群@消息发送失败
       delete callback;
   },
   [=](uint32_t progress) {});
V2TIMManager::GetInstance()->GetMessageManager()->SendMessage(
   message, "denny", {}, V2TIMMessagePriority::V2TIM_PRIORITY_NORMAL, false, {}, callback);

//获取群@数据列表
List<V2TIMGroupAtInfo> atInfoList = conversation.getGroupAtInfoList();
// 解析@类型（@我，@所有人, @我且@所有人）
boolean atMe = false;
boolean atAll = false;
String atTips = "";
for(V2TIMGroupAtInfo atInfo : atInfoList){
 if (atInfo.getAtType() == V2TIMGroupAtInfo.TIM_AT_ME){
   atMe = true;
   continue;
 }
 if (atInfo.getAtType() == V2TIMGroupAtInfo.TIM_AT_ALL){
   atAll = true;
   continue;
 }
}
// 根据@类型，提示
if (atMe && !atAll) {
   atTips = "[有人@我]";
} else if (!atMe && atAll) {
   atTips = "[@所有人]";
} else if (atMe && atAll) {
   atTips = "[有人@我][@所有人]";
}

// 获取群@数据列表
NSArray<V2TIMGroupAtInfo *> *atInfoList = conversation.groupAtInfolist;
// 解析@类型（@我，@所有人, @我且@所有人）
BOOL atMe = NO;         // 是否@我
BOOL atAll = NO;        // 是否@所有人
NSString *atTipsStr = @"";
for (V2TIMGroupAtInfo *atInfo in atInfoList) {
   switch (atInfo.atType) {
       case V2TIM_AT_ME:
           atMe = YES;
           break;
       case V2TIM_AT_ALL:
           atAll = YES;
           break;
       case V2TIM_AT_ALL_AT_ME:
           atMe = YES;
           atAll = YES;
           break;
       default:
           break;
   }
}
// 根据@类型，提示
if (atMe && !atAll) {
   atTipsStr = @"[有人@我]";
}
if (!atMe && atAll) {
   atTipsStr = @"[@所有人]";
}
if (atMe && atAll) {
   atTipsStr = @"[有人@我][@所有人]";
}

// 获取群@数据列表
V2TIMGroupAtInfoVector groupAtInfolist = conversation.groupAtInfolist;
// 解析@类型（@我，@所有人, @我且@所有人）
bool atMe = false;
bool atAll = false;
std::string atTips = "";
for (size_t i = 0; i < groupAtInfolist.Size(); ++i) {
   const V2TIMGroupAtInfo& atInfo = groupAtInfolist[i];
   switch (atInfo.atType) {
       case V2TIM_AT_ME:
           atMe = true;
           break;
       case V2TIM_AT_ALL:
           atAll = true;
           break;
       case V2TIM_AT_ALL_AT_ME:
           atMe = true;
           atAll = true;
           break;
       default:
           break;
   }
}
// 根据@类型，提示
if (atMe && !atAll) {
   atTips = u8"[有人@我]";
} else if (!atMe && atAll) {
   atTips = u8"[@所有人]";
} else if (atMe && atAll) {
   atTips = u8"[有人@我][@所有人]";
}