首先我们创建GameData脚本用来处理玩家的数据

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class GameData : Singleton<GameData> 
{
    public bool isGameOver = false;
    /// <summary>
    /// 场景中防御塔的数量
    /// </summary>
    public int TowerCount = 0;
    /// <summary>
    /// 玩家ID
    /// </summary>
    public int id = 0;
    /// <summary>
    /// 金钱数
    /// </summary>
    public float money = 300;
    /// <summary>
    /// 分数
    /// </summary>
    public float score = 0;
    /// <summary>
    /// 关卡等级
    /// </summary>
    public int level = 1;
    /// <summary>
    /// 水晶血池
    /// </summary>
    public float HP = 100;
    /// <summary>
    /// 怪物生成频率，游戏难度
    /// </summary>
    private float NanDu = 5;

    public void SetData(int id, float money, int level,float score) 
    {
        this.id = id;
        this.money = money;
        this.level = level;
        this.score = score;
        NanDu = NanDu * Mathf.Pow(0.8f,level-1);
        EnemyCreatePos.Instance.CreateSpeed = NanDu;
        GameObject.Find("hp").GetComponent<Text>().text = HP + "";
        GameObject.Find("JinBi").GetComponent<Text>().text = money + "";
        GameObject.Find("level").GetComponent<Text>().text = "LEVEL  " +level + "";
        GameObject.Find("ScoreNum").GetComponent<Text>().text = score + "";
    }

    //高塔血量处理
    public void TakeDamage() 
    {
        HP -= 5;     
        if (HP <= 0) 
        {
            HP = 0;
            isGameOver = true;
            GameMode.Instance.GameOver();
        }
        GameObject.Find("hp").GetComponent<Text>().text = HP + "";
    }

    //金币处理
    public void AddMoney(float num) 
    {
        money += num;
        GameObject.Find("JinBi").GetComponent<Text>().text = money + "";
    }

    public void RemoveMoney(float num) 
    {
        money -= num;
        GameObject.Find("JinBi").GetComponent<Text>().text = money + "";
    }      
        
    //分数处理
    public void DealScore() 
    {
        score += 10;        
        GameObject.Find("ScoreNum").GetComponent<Text>().text = score + "";
        //GameObject.Find("level").GetComponent<Text>().text = "Level  "+level + "";
    }
    //扣分
    public void IncreaseScore()
    {
        score -= 15;
        if (score < 0) 
        {
            score = 0;
        }
        GameObject.Find("ScoreNum").GetComponent<Text>().text = score + "";
    }

    //提示信息

}

然后我们创建DataAdpter脚本，用来数据本地化，即在游戏结束后保存信息

using UnityEngine;
using System.Data;
using Mono.Data.Sqlite;

public class DataAdpter : Singleton<DataAdpter>
{

    public  SqliteConnection Con = new SqliteConnection();
    public  SqliteCommand  Cmd = new SqliteCommand();
    public  DataSet Set = new DataSet();
    public  SqliteDataAdapter  Adp;
    public DataAdpter() 
   {
        Con.ConnectionString = "Data Source = dataP.db";
        Con.Open();
        Cmd.Connection = Con;
    }

    public void CreateTable() 
    {
        //Cmd.CommandText = "create table message(id int(10),money float(20),level int(10),score float(20))";
        Cmd.CommandText = "create table paihangbang(name char(20),score float(20));";
        //Cmd.CommandText = "create table paihangbang(id INTEGER primary key AUTOINCREMENT,name char(20),score float(20))";
        Cmd.ExecuteNonQuery();
    }
 
    public void Add(string name,float score)
    {       
        Cmd.CommandText = "insert into paihangbang(name,score) values('" + name + "',"  +score+ ")";
        Cmd.ExecuteNonQuery();
    }
    //低于最低分的数据删除
    public void Delete(float lowScore,bool po)
    {
        if (po)
        {
            Cmd.CommandText = "delete from paihangbang where score <='" + lowScore + "';";
        }
        else {
            Cmd.CommandText = "delete from paihangbang where score <'" + lowScore + "';";
        }
        
        Cmd.ExecuteNonQuery();
    }

    public void Update(int id,float money,float level,float score)
    {
        //update myte set money = 44 where id = 1;
        //Cmd.CommandText = "update message set money = " + money + ",level = " + level+",score =" +score + " where id = " + id;
        //Cmd.ExecuteNonQuery();
    }
    public ItemData[]  Select()
    {
        Adp = new SqliteDataAdapter ("Select * from paihangbang order by score desc", Con);
        Set = new DataSet();
        Adp.Fill(Set, "paihangbang");
        ItemData[] str = new ItemData[10];
        for (int i = 0; i < str.Length; i++) 
        {
            str[i] = new ItemData();
        }
        if (Set.Tables["paihangbang"].Rows.Count > 0)
        {
            for (int i = 0; i < Set.Tables["paihangbang"].Rows.Count; i++) 
            {
                str[i].name = Set.Tables["paihangbang"].Rows[i]["name"].ToString();
                str[i].score =float.Parse(Set.Tables["paihangbang"].Rows[i]["score"].ToString());
            }
            //str[0] = int.Parse(Set.Tables["paihangbang"].Rows[0]["id"].ToString());
            //str[1] = float .Parse(Set.Tables["paihangbang"].Rows[0]["money"].ToString());
            //str[2]=float .Parse(Set.Tables["paihangbang"].Rows[0]["level"].ToString());
            //str[3] = float.Parse(Set.Tables["paihangbang"].Rows[0]["score"].ToString());
            return str;
        }
        else
        {
            return null ;
        }
    }
    public bool  isTrue()
    {
        string sqlCommandString = @"USE AdventureWorks SELECT name FROM sys.sysobjects WHERE type='U' ORDER BY name";
        //Adp = new SqliteDataAdapter("select * from sqlite_master where type = 'table' and name = 'login'", Con);
        if (sqlCommandString.Equals(null) )
        { 
      
        return true;
        }
        else
        {
            return false;
        }

        Cmd.ExecuteNonQuery();

    }

}

我们来更改一些之前存在的小bug及做一些小改动：
（1）CreatTower脚本：点击图片后，如果点的不是基座，应该清空当前储存的防御塔名字，而不是点了空白后，点击防御塔仍能正常创建。

添加清空代码

（2）EnemyCreatePos脚本，增加随关卡增加怪物生成速度变快的代码，提高难度。

增加难度