为EventTrigger添加自定义事件

           //tempObject 为需要添加事件的物体
            GameObject tempObject;//！！！
            EventTrigger trigger = tempObject.AddComponent<EventTrigger>();
            EventTrigger.Entry entry = new EventTrigger.Entry();
            entry.eventID = EventTriggerType.PointerDown;  //定义为哪种触发事件
            entry.callback.AddListener((data) => { OnDragDelegate((PointerEventData)data, tempObject); });
            trigger.triggers.Add(entry);


    public void OnDragDelegate(PointerEventData data, GameObject go)
    {
        dragGO = go;
    }

为按钮添加自定义事件

using UnityEngine;
using UnityEngine.UI;

public class Example : [MonoBehaviour]
{
    //Make sure to attach these Buttons in the Inspector
    public Button m_YourFirstButton, m_YourSecondButton;

    void Start()
    {
        Button btn1 = m_YourFirstButton.GetComponent<Button>();
        Button btn2 = m_YourSecondButton.GetComponent<Button>();

        //Calls the TaskOnClick/TaskWithParameters method when you click the Button
        btn1.onClick.AddListener(TaskOnClick);
        btn2.onClick.AddListener(delegate {TaskWithParameters("Hello"); });
    }

    void TaskOnClick()
    {
        //Output this to console when the Button is clicked
        [Debug.Log](https://docs.unity3d.com/ScriptReference/Debug.Log.html)("You have clicked the button!");
    }

    void TaskWithParameters(string message)
    {
        //Output this to console when the Button is clicked
        [Debug.Log](https://docs.unity3d.com/ScriptReference/Debug.Log.html)(message);
    }
}