Log

使用UE_LOG时，前面的频道可以使用

CORE_API DECLARE_LOG_CATEGORY_EXTERN(YourChannel, Log, All);

声明自定义频道与类型

官方自带的声明，可以在\Engine\Source\Runtime\Core\Public\CoreGlobals.h中查看

CORE_API DECLARE_LOG_CATEGORY_EXTERN(LogHAL, Log, All);
CORE_API DECLARE_LOG_CATEGORY_EXTERN(LogSerialization, Log, All);
CORE_API DECLARE_LOG_CATEGORY_EXTERN(LogUnrealMath, Log, All);
CORE_API DECLARE_LOG_CATEGORY_EXTERN(LogUnrealMatrix, Log, All);
CORE_API DECLARE_LOG_CATEGORY_EXTERN(LogContentComparisonCommandlet, Log, All);
CORE_API DECLARE_LOG_CATEGORY_EXTERN(LogNetPackageMap, Warning, All);
CORE_API DECLARE_LOG_CATEGORY_EXTERN(LogNetSerialization, Warning, All);
CORE_API DECLARE_LOG_CATEGORY_EXTERN(LogMemory, Log, All);
CORE_API DECLARE_LOG_CATEGORY_EXTERN(LogProfilingDebugging, Log, All);
CORE_API DECLARE_LOG_CATEGORY_EXTERN(LogCore, Log, All);
CORE_API DECLARE_LOG_CATEGORY_EXTERN(LogOutputDevice, Log, All);

CORE_API DECLARE_LOG_CATEGORY_EXTERN(LogSHA, Warning, All);
CORE_API DECLARE_LOG_CATEGORY_EXTERN(LogStats, Log, All);
CORE_API DECLARE_LOG_CATEGORY_EXTERN(LogStreaming, Display, All);
CORE_API DECLARE_LOG_CATEGORY_EXTERN(LogInit, Log, All);
CORE_API DECLARE_LOG_CATEGORY_EXTERN(LogExit, Log, All);
CORE_API DECLARE_LOG_CATEGORY_EXTERN(LogExec, Warning, All);
CORE_API DECLARE_LOG_CATEGORY_EXTERN(LogScript, Warning, All);
CORE_API DECLARE_LOG_CATEGORY_EXTERN(LogLocalization, Error, All);
CORE_API DECLARE_LOG_CATEGORY_EXTERN(LogLongPackageNames, Log, All);
CORE_API DECLARE_LOG_CATEGORY_EXTERN(LogProcess, Log, All);
CORE_API DECLARE_LOG_CATEGORY_EXTERN(LogLoad, Log, All);

使用:

int intVar = 5;
float floatVar = 3.7f;
FString fstringVar = "an fstring variable";
UE_LOG(LogTemp, Warning, TEXT("Text, %d %f %s"), intVar, floatVar, *fstringVar );