1.无参数的UnityEvent 

using UnityEngine;
using UnityEngine.Events;
using System.Collections;
 
public class ExampleClass : MonoBehaviour
{
    UnityEvent m_MyEvent;
 
    void Start()
    {
        if (m_MyEvent == null)
            m_MyEvent = new UnityEvent();
 
        m_MyEvent.AddListener(Ping);
    }
 
    void Update()
    {
        if (Input.anyKeyDown && m_MyEvent != null)
        {
            m_MyEvent.Invoke();
        }
    }
 
    void Ping()
    {
        Debug.Log("Ping");
    }
}

2.带有一个参数的UnityEvent 

using UnityEngine;
using UnityEngine.Events;
 
[System.Serializable]
public class MyIntEvent : UnityEvent<int>
{
}
 
public class ExampleClass : MonoBehaviour
{
    public MyIntEvent m_MyEvent;
 
    void Start()
    {
        if (m_MyEvent == null)
            m_MyEvent = new MyIntEvent();
 
        m_MyEvent.AddListener(Ping);
    }
 
    void Update()
    {
        if (Input.anyKeyDown && m_MyEvent != null)
        {
            m_MyEvent.Invoke(5);
        }
    }
 
    void Ping(int i)
    {
        Debug.Log("Ping" + i);
    }
}

3.四个参数

using UnityEngine;
using UnityEngine.Events;
 
 
[System.Serializable]
public class MyIntEvent : UnityEvent<int, int, int, int>
{
}
 
public class ExampleClass : MonoBehaviour
{
    public MyIntEvent m_MyEvent;
 
    void Start()
    {
        if (m_MyEvent == null)
            m_MyEvent = new MyIntEvent();
 
        m_MyEvent.AddListener(Ping);
    }
 
    void Update()
    {
        if (Input.anyKeyDown && m_MyEvent != null)
        {
            m_MyEvent.Invoke(5, 6, 7, 8);
        }
    }
 
    void Ping(int i, int j, int k, int l)
    {
        Debug.Log("Ping" + i + j + k + l);
    }
}

4.Action 用法

  Action<string> QYaction;
 public  void OnQYSX(string s,Action<string> action)
    {
        QYaction = action;//赋值给宁一个Action
       //action.Invoke(s);
        OnOpenQYSX(s);
    }
 private void OnQYName(string s)
    {
        QYaction.Invoke(s);
    }