工厂模式：以食物生产为例

1. 一个生产食物的工厂（此项 需要建立两个类：食物基类<Food>，工厂类<Factory>）

2. 可以生产不同的食物（此项 建立食物的具体子类，均继承食物的基类）

3. 运行程序生成不同的食物（此项 建立程序运行的主类 继承鱼MonoBehaviour，创建工厂类变量、食物基类变量，然后再Start方法里给食物基类变量赋值<通过传入参数的不同 将父类指向一个子类>）

 

using System.Collections;using System.Collections.Generic;using UnityEngine;/// 
/// 测试工厂模式/// 
// 创建实物的基类public class Food{    public virtual void ShowMe ()    {        Debug.Log ("这是实物基类");    }}// 西红柿类public class TomatoFood:Food{    public override void ShowMe ()    {        // 掉父类方法        base.ShowMe ();        Debug.Log ("TomatoFood");    }}// 鸡蛋public class EggFood:Food{    public override void ShowMe ()    {        base.ShowMe ();        Debug.Log ("EggFood");    }}public class Factory{    public Food MakeFood (string name)    {        if (name == "egg") {            return new EggFood ();        } else if (name == "tomato") {            return new TomatoFood ();        }        return null;    }}public class Main : MonoBehaviour{    Factory factory = new Factory ();    Food food1;    Food food2;    public void Start ()    {        food1 = factory.MakeFood ("egg");        food1.ShowMe ();        food2 = factory.MakeFood ("tomato");        food2.ShowMe ();    }}

 以Resources加载游戏物体为例

using System.Collections;using System.Collections.Generic;using UnityEngine;using UnityEngine.UI;public class SpriteFactory : MonoBehaviour{    public Object[] allSprit;    private int allIndex = 0;    private Transform canvasTransform;    /// 
    /// 加载 Resources 文件夹下的资源    /// 
    void Start ()    {        canvasTransform = GameObject.Find ("Canvas").transform;        LoadSprite ("Number");    }    void Update ()    {        if (Input.GetKeyDown (KeyCode.A)) {            allIndex++;            GameObject tempObj = GetImage (allIndex);            tempObj.transform.parent = canvasTransform;            tempObj.transform.position = new Vector3 (allIndex * 50, 0, 0);        }    }    /// 
    /// 加载Resources文件夹下指定名称的资源    /// 
    /// 指定名称    public void LoadSprite (string name)    {        allSprit = Resources.LoadAll (name);    }    /// 
    /// 加载指定索引的资源，并把该资源显示出来    /// 
    /// 
     
      返回一个新生成的物体，该物体显式刚刚加载的资源
         /// 给出要加载资源的一个索引    public GameObject GetImage (int index)    {        GameObject tempObj = new GameObject ("tempObj");        Image tempImage = tempObj.AddComponent ();        tempImage.sprite = allSprit [index] as Sprite;        return tempObj;    }}