如题，当一个类中的属性发生了改变，从而引发的事件。
这里我们定义一个属性show，当这个属性发生改变的时候，引发了模型的visibility事件。
virtual void PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent) override;由父类继承而来，专门处理属性改变的事件。
1 // Fill out your copyright notice in the Description page of Project Settings.
2
3 #pragma once
4
5 #include "CoreMinimal.h"
6 #include "Engine/StaticMeshActor.h"
7 #include "UObject/ConstructorHelpers.h"
8 #include "Host.generated.h"
9
13 UCLASS()
14 class MYPROJECT11_API AHost : public AStaticMeshActor
15 {
16 GENERATED_BODY()
17
18 public:
19 AHost();
20 UPROPERTY(EditAnywhere)
21 bool show;
22 virtual void PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent) override;
23 UStaticMeshComponent* myMesh;
24 };
源文件：
1 // Fill out your copyright notice in the Description page of Project Settings.
2
3
4 #include "Host.h"
5 #include "Components/StaticMeshComponent.h"
6
7 AHost::AHost() {
8 PrimaryActorTick.bCanEverTick = true;
9 show = true;
10 myMesh = GetStaticMeshComponent();
11
12 auto asset = ConstructorHelpers::FObjectFinder<UStaticMesh>(TEXT("StaticMesh'/Engine/BasicShapes/Cone.Cone'"));
13
14 if (asset.Succeeded()) {
15 myMesh->SetStaticMesh(asset.Object);
16 myMesh->SetGenerateOverlapEvents(true);
17 myMesh->SetVisibility(show);
18 myMesh->SetMobility(EComponentMobility::Movable);
19 myMesh->SetCollisionEnabled(ECollisionEnabled::QueryAndPhysics);
20 myMesh->SetCollisionObjectType(ECC_WorldDynamic);
21 }
22
23 }
24
25 void AHost::PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent)
26 {
27 if (PropertyChangedEvent.Property != nullptr) {
28 const FName PropertyName = PropertyChangedEvent.Property->GetFName(); //获得该类所有属性的名字
29
30 //const FString PropertyName = PropertyChangedEvent.Property->GetName();
31 //PropertyName == GET_MEMBER_NAME_STRING_CHECKED(AHost,show)
32
33 if (PropertyName == GET_MEMBER_NAME_CHECKED(AHost,show)) { //当这个属性名字属于AHost类,且属性名字为show时候，myMesh改变visibility。
34 myMesh->SetVisibility(show);
35 }
36 }
37 Super::PostEditChangeProperty(PropertyChangedEvent); //调用父类的PostEditChangeProperty方法。
38
39 }
其实很多情况可以直接通过包含来完成，这种方式只是更加安全。
原文链接：https://blog.csdn.net/weixin_43654485/article/details/108151949