UE4C++3 物体挨打后来回换色

#include "CoreMinimal.h"
#include "Engine/StaticMeshActor.h"
#include "TargetStaticMeshActor.generated.h"

/**
 * h中的文件
 */
UCLASS()
class LEAMCPP_API ATargetStaticMeshActor : public AStaticMeshActor
{
    GENERATED_BODY()
    
public:
    UPROPERTY(EditDefaultsOnly, Category = "TargetSetting")//定义两个材质，用于来回切换
        UMaterialInterface* TargetRed;
    UPROPERTY(EditDefaultsOnly, Category = "TargetSetting")
        UMaterialInterface* TBlue;

    ATargetStaticMeshActor();
    virtual void NotifyHit(class UPrimitiveComponent* MyComp, AActor* Other, 
        class UPrimitiveComponent* OtherComp, bool bSelfMoved, FVector HitLocation,
        FVector HitNormal, FVector NormalImpulse, const FHitResult& Hit) override;
};

// Fill out your copyright notice in the Description page of Project Settings.
//cpp里的文件

#include "TargetStaticMeshActor.h"
#include "Engine/Engine.h"
#include "LeamCppProjectile.h"

ATargetStaticMeshActor::ATargetStaticMeshActor()
{
    
}
static bool Ifc=true;//定义一个全局变量用于检测颜色以及换色
void ATargetStaticMeshActor::NotifyHit(class UPrimitiveComponent* MyComp, AActor* Other, class UPrimitiveComponent* OtherComp, bool bSelfMoved, FVector HitLocation, FVector HitNormal, FVector NormalImpulse, const FHitResult& Hit)
{
    Super::NotifyHit(MyComp, Other, OtherComp, bSelfMoved, HitLocation, HitNormal, NormalImpulse, Hit);
    if (Other == nullptr) return;

    ALeamCppProjectile* projectile = Cast<ALeamCppProjectile>(Other);
    if (projectile != nullptr) {
        class UStaticMeshComponent* staticMesh = GetStaticMeshComponent();
        if (Ifc) {//如果颜色为a，那么换成b
            staticMesh->SetMaterial(0, TargetRed);
            Ifc = false;
        }
        else {//如果颜色为b，换成a
            staticMesh->SetMaterial(0, TBlue);
            Ifc = true;
        }
        
        if (GEngine)
        {
            GEngine->AddOnScreenDebugMessage(-1, 15.0f, FColor::Yellow, TEXT("ALeamCppProjectile"));
        }
    }
    else {
        if (GEngine)
        {
            GEngine->AddOnScreenDebugMessage(-1, 15.0f, FColor::Yellow, TEXT("NotALeamCppProjectile"));
        }
    }
    if (GEngine)
    {
        GEngine->AddOnScreenDebugMessage(-1, 15.0f, FColor::Yellow, TEXT("NotifyHit"));
    }


}