代码为探索而来，不是最优代码，请按需使用。
Unity3d引擎版本：Uinty3d 20233.2.3f1
补充一下图片如何改成Texture2D：
1、将图片导入unity。
2、选择图片，按下图操作，点击应用即可。
脚本代码：
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
public class ImgVolumeScrpt : MonoBehaviour,IPointerClickHandler
{
//Texture2D texture_CPR_btn_Sound_Open = Resources.Load<Texture2D>("Images/CPR_btn_Sound_Open");
public Texture2D texture_btn_Sound_Open;
public Texture2D texture_btn_Sound_Off;
private bool isOpen = true;
public void OnPointerClick(PointerEventData eventData)
{
UnityEngine.UI.Image img =this.GetComponent("Image") as UnityEngine.UI.Image;
if(!isOpen)
{
Sprite sprite = Sprite.Create(texture_btn_Sound_Open, new Rect(0, 0, texture_btn_Sound_Open.width, texture_btn_Sound_Open.height), new Vector2(1.0f, 1.0f));
img.sprite = sprite;
}
else
{
Sprite sprite = Sprite.Create(texture_btn_Sound_Off, new Rect(0, 0, texture_btn_Sound_Off.width, texture_btn_Sound_Off.height), new Vector2(1.0f, 1.0f));
img.sprite = sprite;
}
isOpen = !isOpen;
}
// Start is called before the first frame update
void Start()
{
}
// Update is called once per frame
void Update()
{
}
}
