c# - 其他对象上的 Unity3D IPointerDownHandler

Question

我有这样的代码

using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;
public class Area : MonoBehaviour, IPointerDownHandler
{
    public Image Area;
    public void OnPointerDown(PointerEventData data){ //some code...}
}

如果我在图像上添加类它工作正常，但我想将类添加到 gameMaganer 对象并将图像设置为公共(public)值 Area 并在其上获取 OnPointerDown。可能吗？

Answer 1

您尝试做的事情仅用一个脚本是不可能的。您至少需要两个脚本:

1. 图像上的一个，实现 IPointerDownHandler 接口(interface)并引发事件，以便您的第二个脚本可以收听它
2. 另一个游戏对象，监听第一个脚本引发的事件:

---

using UnityEngine;
using UnityEngine.EventSystems;

[System.Serializable]
public class PointerEvent : UnityEngine.Events.UnityEvent<PointerEventData> {} ;

public class PointerDownHandler : MonoBehaviour, IPointerDownHandler
{
    public PointerEvent OnPointerDownEvent ;
    public void OnPointerDown(PointerEventData data)
    {
        if( OnPointerDownEvent != null )
            OnPointerDownEvent.Invoke( data ) ;
    }
}

---

using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;
public class Area : MonoBehaviour
{
    public PointerDownHandler PointerDownHandler;

    private void Start()
    {
        OnPointerDownEvent.AddListener( OnPointerDown ) ;
    }

    public void OnPointerDown(PointerEventData data){ //some code...}
}