Unity实现轻量化答题软件，随机题库，非SQL数据库加载形式

资源demo下载：
若看过代码还是一知半解，或者你就是不想打代码，那就去下载demo吧，连接奉上（support：Unity3D 2017.2.0f3）：下载地址

前言：
在做中国某科大的一个生物仿真实验时，校方要求随机题库，让学生做选择题，完成巩固知识。
因考虑到项目量较小，采取了文本加载的方式实现答题功能，未采取数据库的形式。

功能说明：
可随机抽选固定数量的题目，且不重复。

设置了两种题库加载方式，resources内部加载，和streamingAssets外部加载。
可上一题下一题，题目跳转。
题目回答错误时有提示按钮，点击可看正确答案。

记录每一题的已选选项，回看时若正确则提示正确，回看时若错误则提示正确选项。

计算正确率。

代码注释写的比较详细，就不一一讲解了，有问题请留言。
上代码：

/************************************************************
  FileName: AnswerQuestion.cs
  Author:Guido Kuo       Version :1.0        Date: 2019-01-18
  Description:Support Unity 2017.2
************************************************************/

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

namespace Assets.Scripts
{
    public class AnswerQuestion : MonoBehaviour
    {
        [Header("是否随机")]
        public bool IsRandom;
        [Header("抽取题目的数量")]
        [Range(1, 20)]
        public int TopicCount;
        /// 

        /// 题库每行的数据
        /// 
        private string[] _perLineData;
        /// 

        /// 创建二维不规则数组，因选项可能3个或4个，所以创建不规则数组
        /// 
        private string[][] _questionsArray;
        /// 

        /// 记录题目是否已经回答
        /// 
        private readonly List IsAnswer = new List();
        /// 

        /// 记录选择过的序号
        /// 
        private readonly List SelectAnswerIndex = new List();
        /// 

        /// 记录选择的是否正确
        /// 
        private readonly List SelectIsRight = new List();
        /// 

        /// 选择键
        /// 
        public List SelecToggles;
        /// 

        /// 选项
        /// 
        public List SelecAnswer;
        /// 

        /// 上一题按钮
        /// 
        private Button _beforeTopicBtn;
        /// 

        /// 下一题按钮
        /// 
        private Button _nextTopicBtn;
        /// 

        /// 错误提示按钮
        /// 
        private Button _tipsBtn;
        /// 

        /// 正确答案提示
        /// 
        private Text _tipCorrectText;
        /// 

        /// 题目序号
        /// 
        private Text _quesIndexText;
        /// 

        /// 题目内容
        /// 
        private Text _quesContent;
        /// 

        /// 正确率显示
        /// 
        private Text _accuracyText;
        /// 

        /// 第几题
        /// 
        private int _quesIndex = 0;
        /// 

        /// 题目总数量
        /// 
        private int _quesCount;
        /// 

        /// 回答正确的数量
        /// 
        private int _rightCount;
        /// 

        /// 已经大回答的题目数量
        /// 
        private int _answeredCount;
        void Awake()
        {
            _beforeTopicBtn = GameObject.Find("Canvas/BgPanel/Buttons/BeforeTopic").GetComponent();
            _nextTopicBtn = GameObject.Find("Canvas/BgPanel/Buttons/NextTopic").GetComponent();
            _tipsBtn = GameObject.Find("Canvas/BgPanel/Buttons/TipsButton").GetComponent();
            _tipCorrectText = GameObject.Find("Canvas/BgPanel/TipCorrectText").GetComponent();
            _quesIndexText = GameObject.Find("Canvas/BgPanel/QuesIndexText").GetComponent();
            _quesContent = GameObject.Find("Canvas/BgPanel/QuesContent").GetComponent();
            _accuracyText = GameObject.Find("Canvas/BgPanel/AccuracyText").GetComponent();
            for (int i = 0; i < 4; i++)
            {
                SelecToggles.Add(GameObject.Find("Canvas/BgPanel/SelecToggles").transform.GetChild(i).GetComponent());
                SelecAnswer.Add(SelecToggles[i].transform.GetChild(1).GetComponent());
            }
            _beforeTopicBtn.gameObject.SetActive(false);
            if (TopicCount==1)
                _nextTopicBtn.gameObject.SetActive(false);
        }
        void Start()
        {
            //CsvReadQuestions();
            StreamingReadQuestions();
            _beforeTopicBtn.onClick.AddListener(BeforeTopic);
            _nextTopicBtn.onClick.AddListener(NextTopic);
            _tipsBtn.onClick.AddListener(CorrectTip);
            for (int i = 0; i < 4; i++)
            {
                int count = i;
                SelecToggles[i].onValueChanged.AddListener(delegate (bool isOn)
                {
                    if (isOn)
                        JudgeSelect(count);
                });
            }
        }
        /// 

        /// 选择判断
        /// 
        /// 第几个选项
        void JudgeSelect(int selectIndex)
        {

            bool isRight = false;
            int selectCount = 0;
            for (int i = 0; i < 4; i++)
            {
                if (i == selectIndex)
                {
                    SelecToggles[i].isOn = true;
                    int index = _questionsArray[_quesIndex].Length - 1;//该二位数组的长度，减1获得最后一位的序号
                    int correctIndex = int.Parse(_questionsArray[_quesIndex][index]) - 1;//ArrayX[topicIndex][idx]获取到最后一位的正确答案标识，答案序号是0123，所以减1

                    if (i == correctIndex)
                    {
                        if (!IsAnswer[_quesIndex])
                            _tipCorrectText.text = "恭喜你，回答正确！请继续答题。";
                        isRight = true;
                    }
                    else
                    {
                        if (!IsAnswer[_quesIndex])
                            _tipCorrectText.text = "对不起，回答错误！请重新选择或查看提示。";
                        _tipsBtn.gameObject.SetActive(true);
                    }
                    selectCount = i;
                }
                else
                    SelecToggles[i].isOn = false;//单选题
            }
            if (IsAnswer[_quesIndex])
            {
                Debug.Log("已经回答");
            }
            else
            {
                _answeredCount++;
                if (isRight)
                    _rightCount++;
                IsAnswer[_quesIndex] = true;
                SelectAnswerIndex.Add(selectCount + 1);
                SelectIsRight.Add(isRight);
                _accuracyText.text = "正确率：" + ((float)_rightCount / _answeredCount * 100).ToString("f2") + "%";
            }

        }
        /// 

        ///  csv读取Resources内的题库
        /// 
        void CsvReadQuestions()
        {
            //csv二进制读取文件
            TextAsset questions = Resources.Load("面试题库");

            SaveTopicToArray(questions);
        }
        void SaveTopicToArray(TextAsset questions)
        {
            //读取题库中每行的数据
            _perLineData = questions.text.Split("\r"[0]);

            Read(IsRandom);

            _quesCount = _questionsArray.Length - 1;

            for (int i = 0; i <= _quesCount; i++)
                IsAnswer.Add(false);//根据题目数量添加记录值

            TopicSet();
        }
        /// 

        /// 外部加载读取题库
        /// 
        void StreamingReadQuestions()
        {
            //数据流读取文件
            string questions = File.ReadAllText(Application.streamingAssetsPath + "/面试题库.txt");
            SaveTopicToArray(questions);
        }

        void SaveTopicToArray(string questions)
        {
            //读取题库中每行的数据
            _perLineData = questions.Split("\r"[0]);

            Read(IsRandom);

            _quesCount = _questionsArray.Length - 1;

            for (int i = 0; i <= _quesCount; i++)
                IsAnswer.Add(false);//根据题目数量添加记录值

            TopicSet();
        }
        /// 

        /// 添加、判断数据
        /// 
        /// 
        void Read(bool isRandom)
        {
            if (isRandom)
            {
                //确定二位数组的个数
                _questionsArray = new string[TopicCount][];

                List saveRand = new List();
                int randomNum;
                int num = 0;
                //把数据存储到二维数组中
                while (saveRand.Count
        /// 题目设置
        /// 
        void TopicSet()
        {
            _tipsBtn.gameObject.SetActive(false);//初始隐藏提示按钮，错误时显示
            _tipCorrectText.text = "";
            for (int i = 0; i < 4; i++)
                SelecToggles[i].isOn = false;//开始时所有的选择默认为未选
            _quesIndexText.text = "第" + (_quesIndex + 1) + "题：";
            _quesContent.text = _questionsArray[_quesIndex][1];//题目内容  序号0是题目的序号。
            int selectCount = _questionsArray[_quesIndex].Length - 3;//有多少选项  减去3个分别是：序号、题目、正确答案标识
            for (int i = 0; i < selectCount; i++)
            {
                SelecToggles[i].gameObject.SetActive(true);
                SelecAnswer[i].text = _questionsArray[_quesIndex][i + 2];//设置题目的选项。从第三位开始
            }
            if (selectCount < SelecToggles.Count)//判断选项是否有4个，如果没有则隐藏多余的
            {
                for (int i = selectCount; i < SelecToggles.Count; i++)
                    SelecToggles[i].gameObject.SetActive(false);
            }
        }

        /// 

        /// 提示正确答案
        /// 
        void CorrectTip()
        {
            _tipCorrectText.text = "正确答案是：" + JudgeCorrectAnswer() + "";
        }

        /// 

        /// 正确答案的选项
        /// 
        /// 
        string JudgeCorrectAnswer()
        {
            int index = _questionsArray[_quesIndex].Length - 1;//该二位数组的长度，减1获得最后一位的序号
            int correctIndex = int.Parse(_questionsArray[_quesIndex][index]);//ArrayX[topicIndex][idx]获取到最后一位的正确答案标识
            string correctNum = "";
            switch (correctIndex)
            {
                case 1:
                    correctNum = "A";
                    break;
                case 2:
                    correctNum = "B";
                    break;
                case 3:
                    correctNum = "C";
                    break;
                case 4:
                    correctNum = "D";
                    break;
            }

            return correctNum;
        }
        /// 

        /// 上一题
        /// 
        void BeforeTopic()
        {
            if (_quesIndex > 0)
            {
                _quesIndex--;
                TopicSet();
                if (IsAnswer[_quesIndex])//已经答过题
                {
                    if (SelectIsRight[_quesIndex])//并且回答正确
                    {
                        _tipCorrectText.text = "本题已经回答过，且回答正确，请继续答题。";
                        SelecToggles[SelectAnswerIndex[_quesIndex] - 1].isOn = true;
                    }
                    else
                    {
                        SelecToggles[SelectAnswerIndex[_quesIndex] - 1].isOn = true;
                        _tipCorrectText.text = "本题已经回答过，回答错误，正确答案为：" + JudgeCorrectAnswer() + "";
                    }

                }
                if (_quesIndex != _quesCount)
                    _nextTopicBtn.gameObject.SetActive(true);
                if (_quesIndex==0)
                    _beforeTopicBtn.gameObject.SetActive(false);
            }
        }
        /// 

        /// 下一题
        /// 
        void NextTopic()
        {
            if (_quesIndex < _quesCount)
            {
                if (_quesIndex==0)
                {
                    _quesIndex++;
                    TopicSet();
                    if (IsAnswer[_quesIndex])//已经答过题
                    {
                        if (SelectIsRight[_quesIndex])//并且回答正确
                        {
                            _tipCorrectText.text = "本题已经回答过，且回答正确，请继续答题。";
                            SelecToggles[SelectAnswerIndex[_quesIndex - 1]].isOn = true;
                        }
                        else
                        {
                            SelecToggles[SelectAnswerIndex[_quesIndex] - 1].isOn = true;
                            _tipCorrectText.text = "本题已经回答过，回答错误，正确答案为：" + JudgeCorrectAnswer() + "";
                        }
                    }
                }
                else
                {
                    if (IsAnswer[_quesIndex])//已经答过题
                    {
                        if (SelectIsRight[_quesIndex])//并且回答正确
                        {
                            _tipCorrectText.text = "本题已经回答过，且回答正确，请继续答题。";
                            SelecToggles[SelectAnswerIndex[_quesIndex - 1]].isOn = true;
                        }
                        else
                        {
                            SelecToggles[SelectAnswerIndex[_quesIndex] - 1].isOn = true;
                            _tipCorrectText.text = "本题已经回答过，回答错误，正确答案为：" + JudgeCorrectAnswer() + "";
                        }
                    }
                    _quesIndex++;
                    TopicSet();
                }


                if (_quesIndex == _quesCount)
                    _nextTopicBtn.gameObject.SetActive(false);
                if (_quesIndex != 0)
                    _beforeTopicBtn.gameObject.SetActive(true);
            }
        }
    }
}