一、获取指定的单个会话
你可以调用 getConversation(Java / Swift / Objective-C / C++) 获取单个会话的信息，会话信息是一个 V2TIMConversation 对象。
示例代码如下：
JavaSwiftObjective-CC++String conversationID = "conversationID";V2TIMManager.getConversationManager().getConversation(conversationID, new V2TIMValueCallback<V2TIMConversation>() { @Override public void onSuccess(V2TIMConversation v2TIMConversation) { Log.i("imsdk", "success"); } @Override public void onError(int code, String desc) { Log.i("imsdk", "failure, code:" + code + ", desc:" + desc); }});V2TIMManager.shared.getConversationList(nextSeq: 0, count: Int32.max) { list, nextSeq, isFinished in list.forEach { item in print(item.description) }} fail: { code, desc in print("getConversationList fail, \\(code), \\(desc)")}[V2TIMManager.sharedInstance getConversation:@"conversationID" // 要查询的会话 ID succ:^(V2TIMConversation *conv) { // 获取成功，返回 V2TIMConversation 对象} fail:^(int code, NSString *desc) { // 获取失败}];template <class T>class ValueCallback final : public V2TIMValueCallback<T> {public: using SuccessCallback = std::function<void(const T&)>; using ErrorCallback = std::function<void(int, const V2TIMString&)>; ValueCallback() = default; ~ValueCallback() override = default; void SetCallback(SuccessCallback success_callback, ErrorCallback error_callback) { success_callback_ = std::move(success_callback); error_callback_ = std::move(error_callback); } void OnSuccess(const T& value) override { if (success_callback_) { success_callback_(value); } } void OnError(int error_code, const V2TIMString& error_message) override { if (error_callback_) { error_callback_(error_code, error_message); } }private: SuccessCallback success_callback_; ErrorCallback error_callback_;};V2TIMString conversationID = u8"conversationID";auto callback = new ValueCallback<V2TIMConversation>{};callback->SetCallback( [=](const V2TIMConversation& conversation) { // 获取单个会话成功 delete callback; }, [=](int error_code, const V2TIMString& error_message) { // 获取单个会话失败 delete callback; });V2TIMManager::GetInstance()->GetConversationManager()->GetConversation(conversationID, callback);
二、获取指定的多个会话
getConversationList(Java / Swift / Objective-C / C++) 获取指定的会话列表，列表中存储的是 V2TIMConversation 对象。
示例代码如下：
JavaSwiftObjective-CC++List<String> conversationIDList = new ArrayList<>();conversationIDList.add("conversationID1");conversationIDList.add("conversationID1");V2TIMManager.getConversationManager().getConversationList(conversationIDList, new V2TIMValueCallback<List<V2TIMConversation>>() { @Override public void onSuccess(List<V2TIMConversation> conversationList) { Log.i("imsdk", "success"); } @Override public void onError(int code, String desc) { Log.i("imsdk", "failure, code:" + code + ", desc:" + desc); }});V2TIMManager.shared.getConversationList(conversationIDList: ["conversationID1", "conversationID2"]) { list in list.forEach { item in print(item.description) }} fail: { code, desc in print("getConversationList fail, \\(code), \\(desc)")}[V2TIMManager.sharedInstance getConversationList:@[@"convID1", @"convID2"] // 要查询的会话 ID 列表 succ:^(NSArray<V2TIMConversation *> *list) { // 获取成功，list 中包含 V2TIMConversation 对象} fail:^(int code, NSString *desc) { // 获取失败}];template <class T>class ValueCallback final : public V2TIMValueCallback<T> {public: using SuccessCallback = std::function<void(const T&)>; using ErrorCallback = std::function<void(int, const V2TIMString&)>; ValueCallback() = default; ~ValueCallback() override = default; void SetCallback(SuccessCallback success_callback, ErrorCallback error_callback) { success_callback_ = std::move(success_callback); error_callback_ = std::move(error_callback); } void OnSuccess(const T& value) override { if (success_callback_) { success_callback_(value); } } void OnError(int error_code, const V2TIMString& error_message) override { if (error_callback_) { error_callback_(error_code, error_message); } }private: SuccessCallback success_callback_; ErrorCallback error_callback_;};V2TIMStringVector conversationIDList;conversationIDList.PushBack(u8"conversationID1");conversationIDList.PushBack(u8"conversationID2");auto callback = new ValueCallback<V2TIMConversationVector>{};callback->SetCallback( [=](const V2TIMConversationVector& conversationList) { // 获取多个会话成功 delete callback; }, [=](int error_code, const V2TIMString& error_message) { // 获取多个会话失败 delete callback; });V2TIMManager::GetInstance()->GetConversationManager()->GetConversationList(conversationIDList, callback);