创建带有垃圾桶的拖放系统以删除对象

我在创建一个脚本时遇到了麻烦，该脚本允许将游戏对象拖放到屏幕的垃圾区域，从而破坏了游戏对象。我在onDrop函数中哪里出问题了？基本上，我想说的是，当将GameObject扔到垃圾桶上时，它将成为垃圾桶的子代，一旦成为子代，它就会被销毁。这种逻辑有意义吗？

using System.Collections;
using UnityEngine.EventSystems;

namespace MyNamespace
{
    public class DropZone : MonoBehaviour, IDropHandler, IPointerEnterHandler, IPointerExitHandler 
    {
        public void OnPointerEnter(PointerEventData eventData)
        {
            if(eventData.pointerDrag == null)
                return;

            DragHandling dragHandling = eventData.pointerDrag.GetComponent<DragHandling>();

            if(dragHandling != null)
            {
                dragHandling.placeholderParent = this.transform;        // change parent based on drop zone
            } 
        }

    public void OnPointerExit(PointerEventData eventData)
    {
        if(eventData.pointerDrag == null)
            return;

        DragHandling dragHandling = eventData.pointerDrag.GetComponent<DragHandling>();
        if(dragHandling != null && dragHandling.placeholderParent == this.transform)
        {
            dragHandling.placeholderParent = dragHandling.parentToReturnTo;     // change parent based on drop zone
        } 
    }

    public void OnDrop(PointerEventData eventData)
    {
        Debug.Log(eventData.pointerDrag.name + " was dropped on " + gameObject.name);

        DragHandling dragHandling = eventData.pointerDrag.GetComponent<DragHandling>();

        if(dragHandling != null)
        {
            dragHandling.parentToReturnTo = this.transform;     // change parent based on drop zone
        }  

        if (this.transform.parent.gameObject == dragHandling.trashCan) 
        {
            Destroy(this);
        }
    }
}

这是我用来获取变量的脚本：

using UnityEngine;
using UnityEngine.UI;
using System.Collections;
using UnityEngine.EventSystems;
using System.Collections.Generic;

public class DragHandling : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler, IPointerClickHandler
{
    public Transform placeholderParent = null;
    public Transform parentToReturnTo = null;

    GameObject placeholder = null;

    public GameObject trashCan;
    public Transform trashCanTrans;
    public GameObject partsPanel;
    public Transform partsPanelTrans;
    public GameObject buildBoard;
    public GameObject dragLayer;

    void Awake ()
    {
        dragLayer = GameObject.FindGameObjectWithTag("DragLayer");
        buildBoard = GameObject.FindGameObjectWithTag("Board");
        partsPanel = GameObject.FindGameObjectWithTag("Parts");
        trashCan = GameObject.FindGameObjectWithTag("Trash");

        partsPanelTrans = partsPanel.transform;
        // trashCanTrans = trashCan.transform;
    }

    #region IPointerClickHandler implementation

    public void OnPointerClick (PointerEventData eventData)
    {
        if(this.transform.parent.gameObject == buildBoard)
        {
            this.transform.SetAsLastSibling();
        }

    }

    #endregion

    #region IBeginDragHandler implementation

    public void OnBeginDrag (PointerEventData eventData)
    {
        // this.transform.SetAsLastSibling();

        // create placeholder gap and hold correct position in layout
        placeholder = new GameObject();
        placeholder.transform.SetParent(this.transform.parent);
        placeholder.transform.SetSiblingIndex(this.transform.GetSiblingIndex());

        LayoutElement le = placeholder.AddComponent<LayoutElement>();               // add layout element

        le.preferredWidth = this.GetComponent<LayoutElement>().preferredWidth;      
        le.preferredHeight = this.GetComponent<LayoutElement>().preferredHeight;
        le.flexibleWidth = 0;
        le.flexibleHeight = 0;

        parentToReturnTo = this.transform.parent;                   // store current parent location
        placeholderParent = parentToReturnTo;                       // set placeholder gameobject transform

        GetComponent<CanvasGroup>().blocksRaycasts = false;         // turn off image raycasting when dragging image in order to see what's behind the image            
    }

    #endregion

    #region IDragHandler implementation

    public void OnDrag (PointerEventData eventData)
    {
        this.transform.position = eventData.position;               // set object coordinates to mouse coordinates
        this.transform.SetParent(dragLayer.transform);              // pop object to draglayer to move between dropzones
    }

    #endregion

    #region IEndDragHandler implementation

    public void OnEndDrag (PointerEventData eventData)
    {
        this.transform.SetParent(parentToReturnTo);                                 // Snaps object back to orginal parent if dropped outside of a dropzone
        this.transform.SetSiblingIndex(placeholder.transform.GetSiblingIndex());    // Returns card back to placeholder location

        GetComponent<CanvasGroup>().blocksRaycasts = true;                          // turn on Raycast blocking

        Destroy(placeholder);                                                       // kill the placeholder if object hits a drop zone or returns to parts panel
    }

    #endregion
}

好的，我做了一些更改，现在，当我将游戏对象拖到垃圾箱时，它会被销毁，但垃圾箱也是如此。我一直在努力使其运作，但仍然没有运气。这是我现在所拥有的，但仍无法正常工作。

公共无效OnDrop（PointerEventData eventData）{Debug.Log（eventData.pointerDrag.name +“被放置在” + gameObject.name）上；

    DragHandling dragHandling = eventData.pointerDrag.GetComponent<DragHandling>();

    if(dragHandling != null)
    {
        dragHandling.parentToReturnTo = this.transform;     // change parent based on drop zone

        if (this.transform.gameObject == dragHandling.trashCan) 
        {
            Debug.Log("You've dragged something into the trash!");

            Destroy(this.transform.gameObject);
        }
    }  
}