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03-UnrealEngine/Gameplay/UObject/UnrealSpecifiers/Specifier/UPROPERTY/Network/ReplicatedUsing/ReplicatedUsing.md

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+# ReplicatedUsing
+
+- **功能描述：** 指定一个通知回调函数，在属性通过网络更新后执行。
+- **元数据类型：** string="abc"
+- **引擎模块：** Network
+- **作用机制：** 在PropertyFlags中加入[CPF_Net](../../../../Flags/EPropertyFlags/CPF_Net.md), [CPF_RepNotify](../../../../Flags/EPropertyFlags/CPF_RepNotify.md)
+- **常用程度：** ★★★★★
+
+ReplicatedUsing 可以接受无参数的函数，或是带一个参数的函数携带旧值。一般在OnRep函数里，做一些开启关闭的相应操作，比如enabled的复制就会触发相应的后续逻辑。
+
+## 测试代码：
+
+```jsx
+UCLASS(Blueprintable, BlueprintType)
+class INSIDER_API AMyProperty_Network :public AActor
+{
+public:
+	GENERATED_BODY()
+protected:
+	UFUNCTION()
+		void OnRep_MyInt(int32 oldValue);
+UPROPERTY(EditAnywhere, BlueprintReadWrite, ReplicatedUsing = OnRep_MyInt)
+		int32 MyInt_ReplicatedUsing = 123;
+};
+
+void AMyProperty_Network::GetLifetimeReplicatedProps(TArray<FLifetimeProperty>& OutLifetimeProps) const
+{
+	Super::GetLifetimeReplicatedProps(OutLifetimeProps);
+	DOREPLIFETIME(AMyProperty_Network, MyInt_ReplicatedUsing);
+}
+```
+
+在蓝图中等价于RepNotify的作用。
+
+![Untitled](Untitled.png)