说明

1. C++
   
2. 治疗机制
   
   • 受到伤害则延缓治疗；不再受到伤害才会自动治疗
     
   • 使用定时器实现
     
3. 获取定时器管理对象
   
   • UActorComponent::GetOwner > AActor::GetWorldTimerManager
     
   • UActorComponent::GetWorld > UWorld::GetTimerManager
     

实现自动治疗

添加治疗参数

protected

参数	名称
使能自动治疗	AutoHeal
首次治疗延后时长	HealDelay
恢复生命值周期	HealRate
单次恢复量	HealModifier

ShootThemUp: Components/STUHealthComponent.h

Copy 1UPROPERTY(EditDefaultsOnly)
 2bool AutoHeal = true;
 3
 4UPROPERTY(EditDefaultsOnly, meta = (EditCondition = "AutoHeal"))
 5float HealRate = 1.0f;
 6
 7UPROPERTY(EditDefaultsOnly, meta = (EditCondition = "AutoHeal"))
 8float HealDelay = 3.0f;
 9
10UPROPERTY(EditDefaultsOnly, meta = (EditCondition = "AutoHeal"))
11float HealModifier = 5.0f;

添加定时器

添加数据成员

private

ShootThemUp: Components/STUHealthComponent.h

Copy1FTimerHandle HealTimer;

搭建框架

• 添加空的回调函数

  ShootThemUp: Components/STUHealthComponent.cpp
  

  Copy1void USTUHealthComponent::OnHeal() {}

• 定时器接口

  ShootThemUp: Components/STUHealthComponent.cpp
  

  1. 头文件
     

     Copy1#include "Engine/World.h"
     2#include "TimerManager.h"

  2. 开启定时器
     

     Copy 1void USTUHealthComponent::StartHealTimer()
      2{
      3    if (AutoHeal && GetWorld())
      4    {
      5        GetWorld()->GetTimerManager().SetTimer(HealTimer, 
      6                                               this,
      7                                               &USTUHealthComponent::OnHeal,
      8                                               HealRate, 
      9                                               true, 
     10                                               HealDelay);
     11    }
     12}

  3. 关闭定时器
     

     Copy1void USTUHealthComponent::StopHealTimer()
     2{
     3    if (AutoHeal && GetWorld())
     4    {
     5        GetWorld()->GetTimerManager().ClearTimer(HealTimer);
     6    }
     7}

  4. 接口声明
     
     private

ShootThemUp: Components/STUHealthComponent.h
     

• 回调函数声明

  private

ShootThemUp: Components/STUHealthComponent.h
  

回调函数实现

ShootThemUp: Components/STUHealthComponent.cpp

Copy1void USTUHealthComponent::OnHeal()
2{
3    SetHealth(Health + HealModifier);
4    if (FMath::IsNearlyEqual(Health, MaxHealth))
5    {
6        StopHealTimer();
7    }
8}

游戏角色受到伤害延缓治疗

ShootThemUp: Components/STUHealthComponent.cpp

Copy 1void USTUHealthComponent::OnTakeAnyDamage(AActor *DamagedActor, float Damage, const UDamageType *DamageType, AController *InstigatedBy,
 2                                          AActor *DamageCauser)
 3{
 4    if (Damage <= 0.0f || IsDead())
 5        return;
 6
 7    if (!FMath::IsNearlyEqual(Health, MaxHealth))
 8        StopHealTimer();
 9
10    // Health -= Damage;
11    SetHealth(Health - Damage);
12    UE_LOG(LogHealthComponent, Display, TEXT("Damage: %.0f"), Damage);
13
14    if (DamageType)
15    {
16        if (DamageType->IsA<USTUFireDamageType>())
17        {
18            UE_LOG(LogHealthComponent, Display, TEXT("So Hooooooot !!!"));
19        }
20        else if (DamageType->IsA<USTUIceDamageType>())
21        {
22            UE_LOG(LogHealthComponent, Display, TEXT("So Cooooooooold !!!"));
23        }
24    }
25
26    if (IsDead())
27    {
28        OnDeath.Broadcast();
29    }
30    else
31    {
32        StartHealTimer();
33    }
34}

重写IsDead

ShootThemUp: Components/STUHealthComponent.h

Copy1bool IsDead() const { return FMath::IsNearlyZero(Health); }