如何根据字典条目在Unity2D中换出子画面？

using UnityEngine;
using System.Collections.Generic;

public class ImageSwitcher : MonoBehaviour
{
    public Dictionary<string, Sprite> imageDictionary; // 存储字典条目和对应的子画面

    private SpriteRenderer spriteRenderer;

    private void Start()
    {
        spriteRenderer = GetComponent<SpriteRenderer>();
    }

    public void SwitchImage(string dictionaryEntry)
    {
        if (imageDictionary.ContainsKey(dictionaryEntry))
        {
            Sprite newSprite = imageDictionary[dictionaryEntry];
            spriteRenderer.sprite = newSprite;
        }
        else
        {
            Debug.LogError("Dictionary entry not found: " + dictionaryEntry);
        }
    }
}