Unity 动态切换图片

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

/// <summary>切换对象显示</summary>
public class SwitchObject : MonoBehaviour
{
    public GameObject[] goList;

    public Button nextButton;
    public Button previousButton;

    private void Awake()
    {
        previousButton.onClick.AddListener(Previous);
        nextButton.onClick.AddListener(Next);
    }

    private int index;

    private void OnEnable()
    {
        index = 0;
        changeObj();
    }

    public void Next()
    {
        index++;
        if (index > goList.Length - 1) index = goList.Length - 1;
        changeObj();
    }

    public void Previous()
    {
        index--;
        if (index < 0) index = 0;
        changeObj();
    }

    private void changeObj()
    {
        for(int i=0;i< goList.Length;i++)
        {
            goList[i].SetActive(i == index);
        }

        previousButton.interactable= (index != 0);
        nextButton.interactable = (index != goList.Length - 1);

        //previousButton.gameObject.SetActive(index != 0);
        //nextButton.gameObject.SetActive(index != goList.Length - 1);
    }
}