使用BinaryFormatter统一保存整数数组

Question

我正在尝试使用Unity 2018中的二进制格式化程序将整数数组保存到.dat文件。

load函数可以正常工作，但是保存数组会产生异常

用于保存和加载数据的代码：

for loop

构造函数类：

passing the input to your API

这是我保存数据的代码块。我只是在编写用于保存功能的代码行：

using UnityEngine;
using System;
using System.Runtime.Serialization.Formatters.Binary;
using System.IO;

public class encryptAndDecrypt : MonoBehaviour
{

    private static encryptAndDecrypt instance ;

    private string DATA_PATH = "/AnsweredData.dat";
    private answeredData myData;
    public int hasAnswered;


    void Start()
    {
        instance = this;
    }


   public void saveData(int[] value)
    {
        FileStream file = null;

        try
        {

            BinaryFormatter bf = new BinaryFormatter();
            file = File.Create(Application.persistentDataPath + DATA_PATH);

            answeredData ad = new answeredData(value);
            bf.Serialize(file, ad);
            print("data Saved");
        }
        catch (Exception e)
        {
            if (e != null)
            {
                // handle exception
                Debug.Log(e.ToString());
            }
        }

        finally
        {

            if (file != null)
            {
                file.Close();
            }
        }
    }

    public void loadData(int location)
    {
        FileStream file = null;

        try
        {

            BinaryFormatter bf = new BinaryFormatter();
            file = File.Open(Application.persistentDataPath + DATA_PATH, FileMode.Open);
            myData = bf.Deserialize(file) as answeredData;
            Debug.Log("Load Complete");
            hasAnswered = myData.HasAnswered[location];
        }

        catch (Exception e)
        {
            if (e != null)
            {
                // handle exception
            }
        }

    }
}

但是当我运行游戏并尝试将数据保存到索引2或任何其他索引时，出现以下异常：

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

[Serializable]
public class answeredData {

    private int[] hasAnswered = new int[999];

    // Empty constructor
    public answeredData() { }

    // Constructor to take data
    public answeredData(int[] _hasAnswered)
    {
        hasAnswered = _hasAnswered;
    }

    // Public accessor to access values
    public int[] HasAnswered
    {
        get
        {
            return hasAnswered;
        }
        set
        {
            hasAnswered = value;
        }
    }
}