在unity中有兩種單例類型,一種是普通單例,即普通c#類,另一種是繼承了MonoBehaviour的單例。
普通單例:
public abstract class CSharpSingletion<T> where T : new() {
private static T instance;
public static T Instance
{
get
{
if (instance == null)
{
instance = new T();
}
return instance;
}
}
}
繼承了MonoBehaviour的單例:
using UnityEngine;
using System.Collections;
public abstract class MonoSingletion<T> : MonoBehaviour where T : MonoBehaviour {
private static string rootName = "MonoSingletionRoot";
private static GameObject monoSingletionRoot;
private static T instance;
public static T Instance
{
get
{
if (monoSingletionRoot == null)
{
monoSingletionRoot = GameObject.Find(rootName);
if (monoSingletionRoot == null) Debug.Log("please create a gameobject named " + rootName);
}
if (instance == null)
{
instance = monoSingletionRoot.GetComponent<T>();
if (instance == null) instance = monoSingletionRoot.AddComponent<T>();
}
return instance;
}
}
}
第二種需要在場景中建立一個名為MonoSingletionRoot的空物體,才能使用。