vault backup: 2024-10-12 17:19:45

03-UnrealEngine/Gameplay/UObject/UnrealSpecifiers/Meta/DetailsPanel/EditConditionHides/EditConditionHides.md

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+# EditConditionHides
+
+- **功能描述：** 在已经有EditCondition的情况下，指定该属性在EditCondition不满足的情况下隐藏起来。
+- **使用位置：** UPROPERTY
+- **元数据类型：** bool
+- **关联项：** [EditCondition](../EditCondition/EditCondition.md)
+- **常用程度：** ★★★★★
+
+在已经有EditCondition的情况下，指定该属性在EditCondition不满足的情况下隐藏起来。
+
+## 测试代码：
+
+```cpp
+UCLASS(BlueprintType)
+class INSIDER_API UMyProperty_EditCondition_Test :public UObject
+{
+	GENERATED_BODY()
+public:
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = Property)
+	bool MyBool;
+
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = Property, meta = (EditConditionHides, EditCondition = "MyBool"))
+	int32 MyInt_EditCondition_Hides = 123;
+
+public:
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = PropertyExpression)
+	int32 MyFirstInt = 123;
+
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = PropertyExpression)
+	int32 MySecondInt = 123;
+
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = PropertyExpression, meta = (EditConditionHides, EditCondition = "(MyFirstInt+MySecondInt)==500"))
+	int32 MyInt_EditConditionExpression_Hides = 123;
+};
+```
+
+## 测试效果：
+
+下面的图中可以明显见到两个属性随着条件的满足显示了出来。
+
+![EditConditionHides](EditConditionHides.gif)
+
+## 原理：
+
+其实就是加了个是否显示的判断。
+
+```cpp
+bool FPropertyNode::IsOnlyVisibleWhenEditConditionMet() const
+{
+	static const FName Name_EditConditionHides("EditConditionHides");
+	if (Property.IsValid() && Property->HasMetaData(Name_EditConditionHides))
+	{
+		return HasEditCondition();
+	}
+
+	return false;
+}
+```