unity中物体受伤时切换受伤图片_unity 枪伤

using UnityEngine;
public class Enemy : MonoBehaviour {
 
    private SpriteRenderer render;
    public Sprite[] spriteHit;
 
    public float hitTimer = 0.2f;
    private float resetHitTime;
 
void Start () {
        render = GetComponent<SpriteRenderer>();
        resetHitTime = hitTimer;//以后resetHitTime一直等于0.2f
        hitTimer = 0;
    }
void Update(){
   if (hitTimer > 0)
   {
      hitTimer -= Time.deltaTime;
      int frameIndex = (int)((resetHitTime - hitTimer) / (1f / explosionAnimationFrame));
      frameIndex = frameIndex % 2;
      render.sprite = spriteHit[frameIndex];
    }
}
public void BeHit()
    {
        hitTimer = resetHitTime;
    }
 
}