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# NetMulticast
- **功能描述:** 定义一个多播RPC函数在服务器和客户端上都执行。对应的实现函数会添加_Implementation后缀。
- **元数据类型:** bool
- **引擎模块:** Network
- **作用机制:** 在FunctionFlags中加入[FUNC_Net](../../../../Flags/EFunctionFlags/FUNC_Net.md)、[FUNC_NetMulticast](../../../../Flags/EFunctionFlags/FUNC_NetMulticast.md)
- **常用程度:★★★★★**
定义一个多播RPC函数在服务器和客户端上都执行。对应的实现函数会添加_Implementation后缀。
RPC执行的规则参考文档[https://docs.unrealengine.com/4.27/zh-CN/InteractiveExperiences/Networking/Actors/RPCs/](https://docs.unrealengine.com/4.27/zh-CN/InteractiveExperiences/Networking/Actors/RPCs/)
![Untitled](Untitled.png)
## 测试代码:
```cpp
UCLASS(Blueprintable, BlueprintType)
class INSIDER_API AMyFunction_Network :public AActor
{
public:
GENERATED_BODY()
public:
UFUNCTION(BlueprintCallable, NetMulticast, Reliable)
void MyFunc_NetMulticast();
};
void AMyFunction_Network::MyFunc_NetMulticast_Implementation()
{
UInsiderLibrary::PrintFuncStatus(this, TEXT("MyFunc_NetMulticast_Implementation"));
}
```
测试蓝图PIE模式一个ListenServer+2Client
![Untitled](Untitled.png)
## 测试输出结果:
```cpp
LogInsider: Display: 46715a00 MyFunc_NetMulticast_Implementation BP_Network_C_1 NM_ListenServer Local:ROLE_Authority Remote:ROLE_SimulatedProxy
LogInsider: Display: 46e65000 MyFunc_NetMulticast_Implementation BP_Network_C_1 NM_Client Local:ROLE_SimulatedProxy Remote:ROLE_Authority
LogInsider: Display: 29aaaa00 MyFunc_NetMulticast_Implementation BP_Network_C_1 NM_Client Local:ROLE_SimulatedProxy Remote:ROLE_Authority
LogInsider: Display: 4ff44600 OtherMulticastFunc BP_Network_C_1 NM_ListenServer Local:ROLE_Authority Remote:ROLE_SimulatedProxy
LogInsider: Display: 3bf89b00 OtherMulticastFunc BP_Network_C_1 NM_Client Local:ROLE_SimulatedProxy Remote:ROLE_Authority
LogInsider: Display: 29d68700 OtherMulticastFunc BP_Network_C_1 NM_Client Local:ROLE_SimulatedProxy Remote:ROLE_Authority
```
在一个Server Owned的Actor上发出Multicast RPC事件调用可以见到在3个端都得到了调用。

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