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03-UnrealEngine/Gameplay/UObject/UnrealSpecifiers/Meta/Blueprint/NotInputConfigurable/NotInputConfigurable.md

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+# NotInputConfigurable
+
+- **功能描述：** 让一些UInputModifier和UInputTrigger不能在ProjectSettings里配置。
+- **使用位置：** UCLASS
+- **引擎模块：** Blueprint
+- **元数据类型：** bool
+- **限制类型：** UInputModifier和UInputTrigger的子类
+- **常用程度：** ★
+
+让一些UInputModifier和UInputTrigger不能在ProjectSettings里配置。
+
+## 源码例子：
+
+```cpp
+UCLASS(NotBlueprintable, meta = (DisplayName = "Chorded Action", NotInputConfigurable = "true"))
+class ENHANCEDINPUT_API UInputTriggerChordAction : public UInputTrigger
+{}
+
+UCLASS(NotBlueprintable, meta = (DisplayName = "Combo (Beta)", NotInputConfigurable = "true"))
+class ENHANCEDINPUT_API UInputTriggerCombo : public UInputTrigger
+{}
+```
+
+## 测试代码：
+
+```cpp
+UCLASS( meta = (NotInputConfigurable = "true"))
+class INSIDER_API UMyInputTrigger_NotInputConfigurable :public UInputTrigger
+{
+	GENERATED_BODY()
+public:
+	UPROPERTY(EditAnywhere)
+	float MyFloat = 123;
+};
+
+UCLASS( meta = ())
+class INSIDER_API UMyInputTrigger_Configurable :public UInputTrigger
+{
+	GENERATED_BODY()
+public:
+	UPROPERTY(EditAnywhere)
+	float MyFloatConfigurable = 123;
+};
+
+```
+
+## 测试效果：
+
+可见只有UMyInputTrigger_Configurable 可以编辑默认值。
+
+![Untitled](Untitled.png)
+
+## 原理：
+
+UEnhancedInputDeveloperSettings的UI定制化会收集UInputModifier和UInputTrigger的CDO对象，然后根据NotInputConfigurable过滤掉一些不能配置的。
+
+```cpp
+
+	GatherNativeClassDetailsCDOs(UInputModifier::StaticClass(), ModifierCDOs);
+	GatherNativeClassDetailsCDOs(UInputTrigger::StaticClass(), TriggerCDOs);
+	
+	
+void FEnhancedInputDeveloperSettingsCustomization::GatherNativeClassDetailsCDOs(UClass* Class, TArray<UObject*>& CDOs)
+{
+			// Strip objects with no config stored properties
+		CDOs.RemoveAll([Class](UObject* Object) {
+			UClass* ObjectClass = Object->GetClass();
+			if (ObjectClass->GetMetaData(TEXT("NotInputConfigurable")).ToBool())
+			{
+				return true;
+			}
+			while (ObjectClass)
+			{
+				for (FProperty* Property : TFieldRange<FProperty>(ObjectClass, EFieldIteratorFlags::ExcludeSuper, EFieldIteratorFlags::ExcludeDeprecated))
+				{
+					if (Property->HasAnyPropertyFlags(CPF_Config))
+					{
+						return false;
+					}
+				}
+		
+				// Stop searching at the base type. We don't care about configurable properties lower than that.
+				ObjectClass = ObjectClass != Class ? ObjectClass->GetSuperClass() : nullptr;
+			}
+			return true;
+		});
+}
+```