Unity3D的单例模式实现

游戏中有些数据需要在整个程序lifetime中一直保持，即便切换Scene等，也不能注销。这时就可以使用单例模式Singleton

下面是源自EasyTouch插件中的定义模版单例抽象类

 

using UnityEngine;

public abstract class MonoSingleton<T> : MonoBehaviour where T : MonoSingleton<T>
{
private static T m_Instance = null;

public static T instance
{
get
{
if( m_Instance == null )
{
m_Instance = GameObject.FindObjectOfType(typeof(T)) as T;
if( m_Instance == null )
m_Instance = new GameObject("Singleton of " + typeof(T).ToString(),
typeof(T)).GetComponent<T>();

}
return m_Instance;
}
}

private void Awake()
{
if( m_Instance == null )
m_Instance = this as T;
}

private void OnApplicationQuit()
{
m_Instance = null;
}
}

当我们需要一个单例，则

public class TaskManager : MonoSingleton<TaskManager>

{

       ...

}