UE4 call_registered_handler 实现建议

UE4 中这里通过添加命令字的方式来调用用户sdk接口。文件链接这里的方式会随着用户接口增加，协议命令字会越来越多，命令字本身就偏框架底层，应尽量少变动。复用unity中 CALL_REGISTER_HANDLER 的方式这个是否更好， ret = engine.call_registered_handler('get_character_swip', str(params)) ret = engine.call_registered_handler('set_change_rotator',str(params)) ret = engine.call_registered_handler('get_character_scale',str(params)) 然后sdk 也是通过call_registered_handler传入的参数来调用对应的用户函数即可。 sdk 类似下面这样。我这里的方式也不是很美观，最好是能像unity 的方式 register 用户函数，然后也有GET_REGISTERED_HANDLERS 这样的协议。

    void FCommandHandler::HanldeCallRegisteredHandler()
    {
        UE_LOG(GALog, Log, TEXT("CallRegisteredHandler"));
        const TSharedPtr<FJsonObject>& object = ValuePtr->AsObject();
        FString cmd = object->GetStringField("name");
        FString args = object->GetStringField("args");
        FString result = ExecuteRegisteredHandler(cmd, args);
        CommandResponse.ReponseJsonType = ResponseDataType::STRING;
        CommandResponse.ResponseJson = FString::Printf(TEXT("%s"), *result);
        return;

    }

FString ExecuteRegisteredHandler(FString& cmd, FString& args)
    {
        UE_LOG(GALog, Log, TEXT("ExecuteRegisteredHandler  cmd %s ,arg %s"), *cmd, *args);
         if (cmd == FString("UWorldExec"))
        {
            for (TObjectIterator<UUserWidget> Itr; Itr; ++Itr)
            {
                UUserWidget* UserWidget = *Itr;

                if (UserWidget == nullptr || !UserWidget->GetIsVisible() || UserWidget->WidgetTree == nullptr) {
                    continue;
                }
                UWorld* World = Itr->GetWorld();

                if (World != nullptr && World -> GetPlayerControllerIterator())
                {

                    for (FConstPlayerControllerIterator Iterator = World->GetPlayerControllerIterator(); Iterator; ++Iterator)
                    {
                        APlayerController* PlayerController = Iterator->Get();
                        if (PlayerController && PlayerController->IsLocalPlayerController())
                        {
                            FString LevelName = World->GetMapName();
                            UE_LOG(GALog, Log, TEXT("ExecuteRegisteredHandler LevelName %s, cmd %s ,arg %s"), *LevelName, *cmd, *args);
                            FString result = PlayerController->ConsoleCommand(args);
                            UE_LOG(GALog, Log, TEXT("ExecuteRegisteredHandler exec_result %s"), *result);
                            return "true";
                        }
                    }
                    return "false";
                }
            }
        }
        else if (cmd == FString("SetComboBoxString"))
        {
            TArray<FString> array;
            args.ParseIntoArray(array, TEXT(","), true);
            if (array.Num() > 1)
            {
                return SetComboBoxString(array[0], array[1]);
            }
            return FString("invalid args");
        }
        else if (cmd == FString("GetSelectedOption"))
        {
            return GetSelectedOption(args);
        }
        else if (cmd == FString("GetAllOptions"))
        {
            return GetAllOptions(args);
        }
        else if (cmd == FString("GetWidgetBound"))
        {
            TArray<FString> array;
            args.ParseIntoArray(array, TEXT(","), true);
            if (array.Num() > 1)
            {
                return GetWidgetBound(array[0], array[1]);
            }
            FString content;
            return GetWidgetBound(args, content);
        }
        else {

            FName cmd2 = FName(*(cmd));
            FString outpar = callRegisterHandler(cmd2, args);
            return outpar;
        }
        return "false";
    }

Tencent / GAutomator

UE4 call_registered_handler 实现建议 #101