02.继承MonoBehaviour的单例模式基类

一、基本写法

using System.Collections;
using System.Collections.Generic;
using UnityEngine;public class NewBehaviourScript : MonoBehaviour
{private static NewBehaviourScript instance;public static NewBehaviourScript GetInstance(){return instance;}private void Awake(){instance = this;//脚本挂载在游戏对象上，运行时赋值}
}

二、改进后

using System.Collections;
using System.Collections.Generic;
using UnityEngine;public class SingletonMono<T> : MonoBehaviour where T:MonoBehaviour
{// Start is called before the first frame updateprivate static T instance;public static T GetInstance(){return instance;}protected virtual void Awake(){instance = this as T;}
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;public class NewBehaviourScript : SingletonMono<NewBehaviourScript>
{private void Start(){NewBehaviourScript.GetInstance();}protected override void Awake(){base.Awake();}
}

继承了MonoBehaviour的单例模式对象，需要我们自己保证它的唯一性，不要重复挂载一个脚本，否则它的唯一性就会被破坏。

三、自动创建对象并挂载脚本的方法，不用手动挂载脚本，防止重复挂载

using System.Collections;
using System.Collections.Generic;
using UnityEngine;public class SingletonAutoMono<T> : MonoBehaviour where T : MonoBehaviour
{// Start is called before the first frame updateprivate static T instance;public static T GetInstance(){if (instance == null){GameObject obj = new GameObject();//设置对象的名字为脚本名obj.name = typeof(T).ToString();GameObject.DontDestroyOnLoad(obj);instance = obj.AddComponent<T>();}return instance;}}

测试脚本

using System.Collections;
using System.Collections.Generic;
using UnityEngine;public class NewBehaviourScript : SingletonAutoMono<NewBehaviourScript>
{public void Test(){Debug.Log(NewBehaviourScript.GetInstance().name);}
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;public class Test : MonoBehaviour
{// Start is called before the first frame updatevoid Start(){NewBehaviourScript.GetInstance().Test();}}