设置HP条UI

概述

设置常见的生命值条，

实现过程

设置UI/image作为形状
设置UI/Image作为背景
设置UI/image（healthfill）作为填充图片，层数低于背景
设置heathfill的imagetype为filled
fillmethod为horizontal

 [SerializeField] private Image healthFill;
 public void AddHealth(int healAmount)
    {
        health += healAmount;
        if (health > maxHealth)
            health = maxHealth;
        healthFill.fillAmount = health / maxHealth;
    }