UE5 C++ UGameInstance 功能、作用及应用

说明以该命令行模式启动游戏的前提下的两个问题：

1.WITH_EDITOR中的代码会被编译

2.由于没有在编辑器中(即没有打开虚幻编辑器)，所以GIsEditor为false

WITH_EDITOR和WITH_EDITORONLY_DATA的区别

在论坛中找到的答案：

WITH_EDITORONLY_DATA in headers for wrapping reflected members.
WITH_EDITOR in CPP files for code.. Has nothing to do with reflection.

意思就是：

头文件中使用WITH_EDITORONLY_DATA包装反射的成员。

在CPP文件的代码中使用WITH_EDITOR，与反射无关。

callineditor

	
.h
    UFUNCTION(CallInEditor, Category = "Sky Creator|General")
	void SetEditorTimeOfDay(float NewValue);
	UFUNCTION(CallInEditor, Category = "Sky Creator|General")
	void SetEditorWeatherPreset(USkyCreatorWeatherPreset* NewValue);
	UFUNCTION(CallInEditor, Category = "Sky Creator|General")
	void SetEditorWeatherSettings(FSkyCreatorWeatherSettings NewValue);

.cpp


#define SKYCREATOR_DECLARE_SEQUENCER_SETFUNCTION_ANDUPDATE(MemberType, MemberName) void ASkyCreator::Set##MemberName(MemberType NewValue)\
{\
	if (MemberName != NewValue)\
	{\
		MemberName = NewValue;\
		UpdateSettings();\
	}\
}\

SKYCREATOR_DECLARE_SEQUENCER_SETFUNCTION(float, EditorTimeOfDay);
SKYCREATOR_DECLARE_SEQUENCER_SETFUNCTION_ANDUPDATE(USkyCreatorWeatherPreset*, EditorWeatherPreset);

SKYCREATOR_DECLARE_SEQUENCER_SETFUNCTION(float, SunriseTime);
SKYCREATOR_DECLARE_SEQUENCER_SETFUNCTION(float, SunsetTime);
SKYCREATOR_DECLARE_SEQUENCER_SETFUNCTION(float, SunDawnOffsetTim

//ue 5.2
namespace EWorldType
{
	enum Type
	{
		/** An untyped world, in most cases this will be the vestigial worlds of streamed in sub-levels */
		None,

		/** The game world */
		Game,

		/** A world being edited in the editor */
		Editor,

		/** A Play In Editor world */
		PIE,

		/** A preview world for an editor tool */
		EditorPreview,

		/** A preview world for a game */
		GamePreview,

		/** A minimal RPC world for a game */
		GameRPC,

		/** An editor world that was loaded but not currently being edited in the level editor */
		Inactive
	};
}