GunMayhem-工厂模式优化枪械创建

原先的设计

在原来的实现方案中，使用了一个空物体WeaponPoolObj挂载了WeaponPool脚本，该脚本中利用Dictionary实现对武器名称和武器GameObject的管理。

问题：

• 每个地图场景都要有WeaponPoolObj这个物体
• Unity中的Dictionary不支持序列化，无法在编辑界面中手动添加武器键值对，要用代码添加
• 想实现Dictionary序列化，必须手动实现SerializableDictionary或第三方插件

优化：使用工厂模式优化枪械的创建

• 创建继承自ScriptableObject的WeaponFactory，方便在Inspector中编辑
• 在WeaponFactory中实现武器的创建GetWeapon
• 在角色和敌人的脚本中Resources.Load<WeaponFactory>，并在需要的时候调用GetWeapon方法获取武器

UML类图

代码实现

PlayerBehavior

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

public class PlayerBehave : MonoBehaviour
{
    private WeaponFactory weaponFactory;

    void Start()
    {
        weaponFactory = Resources.Load<WeaponFactory>("WeaponFactory");
        setBaseWeapon();
    }

    /// <summary>
    /// 设置武器
    /// </summary>
    /// <param name="name"></param>
    public void setWeapon(string name)
    {
        if (transform.Find("weapon") != null)
            Destroy(transform.Find("weapon").gameObject);

        GameObject temp = weaponFactory.GetWeapon(name);
        temp.transform.SetParent(transform);
        temp.transform.position = weaponPoint.position;
        temp.transform.localScale = Vector3.one;  //修复武器反向的Bug
        temp.name = "weapon";

        //设置武器阵营
        if (transform.Find("weapon") != null)
            transform.Find("weapon").GetComponent<weapon>().setTeam(playerInfo.getTeam());
        else Debug.Log(gameObject.name + " Weapon not found!");
    }

    /// <summary>
    /// 设置初始武器
    /// </summary>
    public void setBaseWeapon()
    {
        setWeapon(firstWeapon);
    }
}

WeaponFactory

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

[CreateAssetMenu(fileName = "WeaponFactory", menuName = "Factory/WeaponFactory")]
public class WeaponFactory : ScriptableObject
{
    #region pistol
    [SerializeField]
    private GameObject bull;
    [SerializeField]
    private GameObject glock;
    [SerializeField]
    private GameObject gold;
    [SerializeField]
    private GameObject m1911;
    #endregion

    #region rifle
    [SerializeField]
    private GameObject ak47;
    [SerializeField]
    private GameObject bizon;
    [SerializeField]
    private GameObject m12;
    [SerializeField]
    private GameObject p90;
    #endregion

    #region shotGun
    [SerializeField]
    private GameObject ithaca;
    [SerializeField]
    private GameObject ksg;
    [SerializeField]
    private GameObject leaver;
    [SerializeField]
    private GameObject sawnOff;
    #endregion

    #region sniper
    [SerializeField]
    private GameObject sniper501;
    [SerializeField]
    private GameObject awn;
    [SerializeField]
    private GameObject hk;
    [SerializeField]
    private GameObject m95;
    #endregion

    public GameObject GetWeapon(string GameObjectName)
    {
        switch (GameObjectName)
        {
            case "bull":
                return Instantiate(bull);
            case "glock":
                return Instantiate(glock);
            case "gold":
                return Instantiate(gold);
            case "m1911":
                return Instantiate(m1911);
            case "ak47":
                return Instantiate(ak47);
            case "bizon":
                return Instantiate(bizon);
            case "m12":
                return Instantiate(m12);
            case "p90":
                return Instantiate(p90);
            case "ithaca":
                return Instantiate(ithaca);
            case "ksg":
                return Instantiate(ksg);
            case "leaver":
                return Instantiate(leaver);
            case "sawnOff":
                return Instantiate(sawnOff);
            case "501":
                return Instantiate(sniper501);
            case "awn":
                return Instantiate(awn);
            case "hk":
                return Instantiate(hk);
            case "m95":
                return Instantiate(m95);
            default:
                Debug.LogWarning("GameObject:" + GameObjectName + "Not Found");
                return Instantiate(bull);
        }
    }
}

可优化的地方

GetWeapon采用字符串作为参数来判断生成哪种武器，编码中输入字符串时容易出错，可以改用枚举