Unity 小记 —— 泛型单例

简单泛型单例

/// <summary>
/// 单例基类
/// </summary>
/// <typeparam name="T"></typeparam>
public class Singleton<T> : MonoBehaviour where T : Component
{
    private static bool appQuiting = false;
    private static T instance = null;
    public static T Instance
    {
        get {
            if (instance == null && !appQuiting)
            {
                var obj = GameObject.Find("Singleton Manager");
                if (obj == null)
                {
                    obj = new GameObject("Singleton Manager");
                    DontDestroyOnLoad(obj);
                }
                instance = obj.GetComponent<T>();
                if (instance == null)
                {
                    instance = obj.AddComponent<T>();
                    (instance as Singleton<T>).Init();
                }
            }
            return instance;
        }
        set => instance = value;
    }
    /// <summary>
    /// 初始化函数
    /// </summary>
    protected virtual void Init() { }
    
    private void OnApplicationQuit()
    {
        appQuiting = true;
    }
}

用例：

public class Test01 : MonoBehaviour
{
    private void Start()
    {
        MyClass.Instance.SetName("(⊙_⊙)?");
    }
}

public class MyClass : Singleton<MyClass>
{
    public string Name { get; set; }
    public void SetName(string name)
    {
        Name = name;
    }
}