Unity 2D 鼠标点击事件 Debug.Log 获取方法名称

在Unity中，你可以使用Delegate的GetInvocationList()方法获取事件的所有注册方法，并使用Method.Name属性获取方法的名称。以下是一个示例代码：

using UnityEngine;

public class InputManager : MonoBehaviour
{
    public delegate void MouseClickEventHandler();
    public event MouseClickEventHandler OnMouseLeftClick;

    private void Update()
    {
        if (Input.GetMouseButtonDown(0))
        {
            OnMouseLeftClick?.Invoke();
        }
    }
}

public class PlacementManager : MonoBehaviour
{
    private void Start()
    {
        InputManager inputManager1 = GetComponent<InputManager>();
        PlacementManager placementManager1 = GetComponent<PlacementManager>();

        inputManager1.OnMouseLeftClick += placementManager1.StartChange;
        Debug.Log("OnMouseLeftClick is currently assigned to: " + GetDelegateMethodName(inputManager1.OnMouseLeftClick));
    }

    private string GetDelegateMethodName(Delegate del)
    {
        if (del == null)
        {
            return "No method assigned";
        }

        string methodName = "";
        foreach (Delegate subDel in del.GetInvocationList())
        {
            methodName += subDel.Method.Name + ", ";
        }

        return methodName.TrimEnd(',', ' ');
    }

    private void StartChange()
    {
        // Method assigned to OnMouseLeftClick
    }
}

此示例中，我们在Start()方法中使用GetDelegateMethodName()方法获取inputManager1.OnMouseLeftClick事件的注册方法的名称，并使用Debug.Log()输出到控制台。