19,血量条UMG从蓝图到c++

核心是用 C++ 基类封装逻辑，蓝图派生类负责布局 / 样式，彻底解耦。

原来的umg

改后

// Fill out your copyright notice in the Description page of Project Settings.

#pragma once

#include "CoreMinimal.h"

#include "Blueprint/UserWidget.h"

#include "PlayerHPBarWidget.generated.h"

class UProgressBar;

UCLASS()

class ROUGHLIKE1_API UPlayerHPBarWidget : public UUserWidget

{

GENERATED_BODY()

public:

UPROPERTY(meta = (BindWidget))

UProgressBar* P_HP;

复制代码

UFUNCTION(BlueprintCallable, Category = "UI")
void UpdateHeadBar(float curHP, float maxHP);

};

// Fill out your copyright notice in the Description page of Project Settings.

#include "umg/PlayerHPBarWidget.h"

#include <Components/ProgressBar.h>

void UPlayerHPBarWidget::UpdateHeadBar(float curHP, float maxHP)

{

if (!P_HP)

{

return;

}

if (maxHP <= 0.0f)

{

return;

}

if (curHP <= 0.0f)

{

return;

}

float percent = curHP / maxHP;

percent = FMath::Clamp(percent, 0.0f, 1.0f);

P_HP->SetPercent(percent);

}