在unity中做一个记忆拼图，但是我有一个空错误

Question

我正在统一制作一个记忆拼图，当我点击我的记忆 UI 上的开始按钮时，它给了我一个错误。

错误： NullReferenceException：对象引用未设置到对象的实例 MemoryPuzzle+d__11.MoveNext ()（位于 Assets/Scripts/Memory Puzzle/MemoryPuzzle.cs:49） UnityEngine.SetupCoroutine.InvokeMoveNext (System.Collections.IEnumerator 枚举器, System.IntPtr returnValueAddress) (at <4014a86cbefb4944b2b6c9211c8fd2fc>:0) UnityEngine.MonoBehaviour:StartCoroutine(IEnumerator) MemoryPuzzle:StartGame()（位于 Assets/Scripts/Memory Puzzle/MemoryPuzzle.cs:102） UnityEngine.EventSystems.EventSystem:Update()（位于 Library/PackageCache/[email protected]/Runtime/EventSystem/EventSystem.cs:501）

脚本：

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

public class MemoryPuzzle : MonoBehaviour
{
    public Text instructionsText;
    public Button startButton;
    public Button resetButton;
    public AudioClip correctSound;
    public AudioClip incorrectSound;
    public GameObject door;
    public Button[] colorButtons;

    private List<Color> sequence;
    private int currentIndex;

    // Start is called before the first frame update
    void Start()
    {
        // Hide the reset button and door at the beginning of the game
        resetButton.gameObject.SetActive(false);

        // Set up the start button to initiate the game
        startButton.onClick.AddListener(StartGame);

        // Set up the color buttons to allow the player to input their sequence
        for (int i = 0; i < colorButtons.Length; i++)
        {
            int buttonIndex = i;
            colorButtons[i].onClick.AddListener(() => ColorButtonClicked(buttonIndex));
        }
    }

    // Generate a random sequence of colors
    void GenerateSequence()
    {
        sequence = new List<Color>();
        for (int i = 0; i < 4; i++)
        {
            sequence.Add(new Color(Random.value, Random.value, Random.value));
        }
    }

    // Display the sequence of colors to the player
    IEnumerator ShowSequence()
    {
        instructionsText.text = "Look!";
        yield return new WaitForSeconds(1f);

        for(int i = 0; i < sequence.Count; i++)
        {
            instructionsText.text = "Color " + (i + 1) + ":";
            yield return new WaitForSeconds(1f);

            colorButtons[0].GetComponent<Image>().color = sequence[i];
            yield return new WaitForSeconds(1f);

            colorButtons[0].GetComponent<Image>().color = Color.white;
            yield return new WaitForSeconds(0.5f);
        }

        instructionsText.text = "MEMORIZE";
        currentIndex = 0;
    }

    // Handle the player clicking a color button
    void ColorButtonClicked(int index)
    {
        if (sequence[currentIndex] == colorButtons[index].GetComponent<Image>().color)
        {
            currentIndex++;

            // Play a sound effect for correct input
            GetComponent<AudioSource>().PlayOneShot(correctSound);

            // If the player has input the entire sequence correctly, unlock the door and display a success message
            if (currentIndex == sequence.Count)
            {
                instructionsText.text = "Correct!";
                resetButton.gameObject.SetActive(false);
                door.SetActive(false);
            }
        }
        else
        {
            // Play a sound effect for incorrect input
            GetComponent<AudioSource>().PlayOneShot(incorrectSound);

            // Display an error message and reset the game
            instructionsText.text = "nope :(";
            StartCoroutine(ResetGame());
        }
    }

    // Start the game
    void StartGame()
    {
        // Hide the start button and display the instructions
        startButton.gameObject.SetActive(false);
        StartCoroutine(ShowSequence());
    }

    // Reset the game
    IEnumerator ResetGame()
    {
        // Wait for a few seconds before resetting the game
        yield return new WaitForSeconds(2f);

        // Hide the reset button and display the start button
        resetButton.gameObject.SetActive(false);
        startButton.gameObject.SetActive(true);

        // Generate a new sequence of colors
        GenerateSequence();
    }
}`

我绑定了一些东西，比如询问 ChatGPT，但没有运气。它应该在按钮上生成随机颜色，你必须通过单击按钮来匹配序列来记住图案。