tencent cloud

V2TIMManager.getMessageManager().findMessages(messageIDList, new V2TIMValueCallback<List<V2TIMMessage>>() {
   @Override
   public void onSuccess(List<V2TIMMessage> v2TIMMessages) {}
    @Override
   public void onError(int code, String desc) {}
});

[V2TIMManager.sharedInstance findMessages:messageIDList
                                       succ:^(NSArray<V2TIMMessage *> *msgs) {
   // 查询消息成功
} fail:^(int code, NSString *desc) {
   // 查询消息失败
}];

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_;
};
auto callback = new ValueCallback<V2TIMMessageVector>{};
callback->SetCallback(
   [=](const V2TIMMessageVector& messageVector) {
       // 查询消息成功
       delete callback;
   },
   [=](int error_code, const V2TIMString& error_message) {
       // 查询消息失败
       delete callback;
   });
V2TIMManager::GetInstance()->GetMessageManager()->FindMessages(messageIDList, callback);