纯C++事件

一、创建多播委托类型及对象

1、AUECpp_Sender.h

cpp 复制代码
	//声明一个参数多播委托的类型,一定要F开头
	DECLARE_MULTICAST_DELEGATE_OneParam(FUECpp_Broadcast, int);
	//创建对象
	FUECpp_Broadcast UECpp_Broadcast;

2、AUECpp_Sender.cpp

cpp 复制代码
	//发送广播
	UECpp_Broadcast.Broadcast(FMath::RandRange(0, 100));

二、订阅及取消订阅

1、AUECpp_Receiver.h

cpp 复制代码
protected:
	virtual void BeginPlay() override;

public:
	void OnReceived(int Param);	

2、AUECpp_Receiver.cpp

cpp 复制代码
#include "UECpp_Sender.h"
#include "Kismet/GameplayStatics.h"
#include "Engine/Engine.h"
#include "TimerManager.h"

void AUECpp_Receiver::BeginPlay()
{
	Super::BeginPlay();
	//订阅
	AUECpp_Sender* PlayerPawn = Cast<AUECpp_Sender>(UGameplayStatics::GetPlayerPawn(this, 0));
	FDelegateHandle DelegateHandle = PlayerPawn->UECpp_Broadcast.AddUObject(this, &AUECpp_Receiver::OnReceived);

	//计时器
	FTimerHandle TimerHandle;
	auto Lambda = [PlayerPawn, DelegateHandle, this]()
		{
			//取消订阅
			PlayerPawn->UECpp_Broadcast.Remove(DelegateHandle);
			//取消指定类里所有订阅
			PlayerPawn->UECpp_Broadcast.RemoveAll(this->GetPrivateStaticClass());
			//取消所有订阅
			PlayerPawn->UECpp_Broadcast.Clear();
		};
	GetWorld()->GetTimerManager().SetTimer(TimerHandle, FTimerDelegate::CreateLambda(Lambda), 5.0f, false);
}

void AUECpp_Receiver::OnReceived(int Param)
{
	GEngine->AddOnScreenDebugMessage(INDEX_NONE, 10.0f, FColor::Green, FString::Printf(TEXT("%i"), Param));
}
相关推荐
ue星空5 小时前
月2期学习笔记
学习·游戏·ue5
曼巴UE51 天前
UE5 制作游戏框架的部分经验积累(持续更新)
游戏·ue5
CandyU22 天前
UE5 基础应用 —— 10 - 控制台命令
ue5
平行云4 天前
Paraverse平行云实时云渲染助力第82届威尼斯电影节XR沉浸式体验
unity·云原生·ue5·xr·实时云渲染
一眼万里*e5 天前
用ai写了个UE5插件
c++·ue5
成都渲染101云渲染66665 天前
电脑配置不足怎么办,告别硬件束缚,川翔云电脑
ue5·电脑
m0_552200826 天前
《UE5_C++多人TPS完整教程》学习笔记47 ——《P48 瞄准行走(Aim Walking)》
c++·游戏·ue5
会思考的猴子9 天前
UE5 PCG 笔记(三) Normal To Density 节点
笔记·ue5
吴梓穆14 天前
UE5 UI遮罩
ue5
枯萎穿心攻击14 天前
Unity VS UE 性能工具与内存管理
开发语言·游戏·unity·ue5·游戏引擎·虚幻·虚幻引擎