You can observe your logs in the Unreal Editor by navigating to Window > Output Log. The Output Log window is located in the Unreal Editor. Logs are saved in a .txt file in your project's Saved/Logs directory; UE_LOG. UE_LOG is a macro that logs a formatted message into the log file. For example:

UE_LOG is a macro that outputs the log message into the log file. The first input parameter it takes is the name of the logging category. There are many of these categories already built into the engine, defined in CoreGlobals.h. You can also create your own custom logging categories.

日志（Logging）意味着在运行期间的某个时间保持事件、函数调用、变量值等的有序记录。 这通常以文本的形式保存在日志文件中。 日志对于 Unreal应用开发 的调试排错非常有帮助，本文涵盖UE4日志宏的语法、日志消息的格式化、自定义日志类别以及如何在屏幕输出日志等内容。 下面是一个简单的日志消息示例： 要利用日志语句中获得输出，请确保在测试更改之前编译项目。 …

Feb 3, 2021 · Passing a macro into a macro where the TEXT macro is putting an L in front of the “xxx” to make a unicode TCHAR array. /** #define UE_LOG(CategoryName, Verbosity, Format, ...) static_assert(TIsArrayOrRefOfType<decltype(Format), TCHAR>::Value, "Formatting string must be a TCHAR array.");

Jul 21, 2016 · UE_LOG(LogTemp, Warning, TEXT("%s"), *FPaths::GetPath("../")); should work with Unreal's version of Datatypes instead of using the std library. You can accept your own answer if it's correct :P And try to use Unreal's string, array, map...etc. instead of std ones since Unreal has its own magic...

ue_log를 통해 로그를 출력한다. 첫 번째 인자(로그 카테고리) 일반적으로 LogTemp를 쓰며, 사용자가 커스텀하여 사용이 가능하다.

Jan 22, 2024 · UE_LOG. Here's an example of a simple log output: UE_LOG (LogTemp, Display, TEXT ("This is a log to the console and log file")); The Unreal Engine has implemented the logging function via a macro. This macro expects 3 parameters: The category name. The log verbosity level. The text to be output. Category

Mar 6, 2024 · UE_LOGFMT provides modern string interpolation, offered in std::format, std::print and libraries like fmtlib and spdlog. As well as that, we see a way for customizing your Unreal log messages, included in your own C++ source files.

Apr 28, 2022 · This post assumes that you’re already familiar with the various UE logging facilities such as UE_LOG or GEngine->AddOnScreenDebugMessage and examines a few approaches on how we can make something better.

Nov 30, 2017 · Below are three ways of how to log messages. Below is the full .cpp file. The top two define calls are shortcuts to make logging messages easier.