UGUI控件可拖拽移动类组件

由于Unity3d自带的UGUI不带拖拽功能,想要实现拖拽功能,必须自己实现拖拽类.所以我写了一个通用的UGUI拖拽组件,使用方便.

使用方法:

直接放到要拖拽的UI组件上,设置目标移动的对象即可,也可以不设置目标对象,默认是拖动对象自己.

using UnityEngine;using System.Collections;using UnityEngine.EventSystems;using UnityEngine.UI;public class DragBase : MonoBehaviour,IPointerDownHandler,IDragHandler{private Vector2 Local_Pointer_Position;private Vector3 Panel_Local_Position;public RectTransform targetObject; private RectTransform parentRectTransform;  //父窗口矩阵private RectTransform targetRectTransform; //移动目标矩阵void Awake(){if (targetObject == null) {targetObject=transform as RectTransform;}parentRectTransform = targetObject.parent as RectTransform;targetRectTransform=targetObject as RectTransform;}public void OnPointerDown(PointerEventData data){Panel_Local_Position = targetRectTransform.localPosition;RectTransformUtility.ScreenPointToLocalPointInRectangle(parentRectTransform, data.position, data.pressEventCamera, out Local_Pointer_Position);targetObject.gameObject.transform.SetAsLastSibling();//保证当前操作的对象能够优先渲染，即不会被其它对象遮挡住}public void OnDrag(PointerEventData data){Vector2 localPointerPosition;if (RectTransformUtility.ScreenPointToLocalPointInRectangle(parentRectTransform, data.position, data.pressEventCamera, out localPointerPosition)){Vector3 offsetToOriginal = localPointerPosition - Local_Pointer_Position;targetObject.localPosition = Panel_Local_Position + offsetToOriginal;}}}

以下是一个背包拖拽物品基础类,可以修改了变成可拖拽背包.

using UnityEngine;using System.Collections;using UnityEngine.EventSystems;using UnityEngine.UI;public class DragItem : MonoBehaviour,IPointerDownHandler,IDragHandler,IBeginDragHandler,IEndDragHandler {private Vector2 Local_Pointer_Position;private Vector3 Panel_Local_Position;public RectTransform targetObject; private RectTransform parentRectTransform;  //父窗口矩阵private RectTransform targetRectTransform; //移动目标矩阵private CanvasGroup canvasgroup;void Awake(){if (targetObject == null) {targetObject=transform as RectTransform;}//CanvasGroupcanvasgroup=GetComponent<CanvasGroup>();if(!canvasgroup)canvasgroup=gameObject.AddComponent("CanvasGroup")as CanvasGroup;//panelRectTransform = transform.parent as RectTransform;parentRectTransform = targetObject.parent as RectTransform;targetRectTransform=targetObject as RectTransform;}public void OnPointerDown(PointerEventData data){Panel_Local_Position = targetRectTransform.localPosition;RectTransformUtility.ScreenPointToLocalPointInRectangle(parentRectTransform, data.position, data.pressEventCamera, out Local_Pointer_Position);targetObject.gameObject.transform.SetAsLastSibling();//保证当前操作的对象能够优先渲染，即不会被其它对象遮挡住}public void OnBeginDrag (PointerEventData eventData){canvasgroup.blocksRaycasts = false;}public void OnDrag(PointerEventData data){//if (panelRectTransform == null || parentRectTransform == null)//return;//print (data.position);//检测到拖拽物品的下放物品.if (data.pointerEnter != null) {if(data.pointerEnter.name!="test")print (data.pointerEnter.name);}Vector2 localPointerPosition;if (RectTransformUtility.ScreenPointToLocalPointInRectangle(parentRectTransform, data.position, data.pressEventCamera, out localPointerPosition)){Vector3 offsetToOriginal = localPointerPosition - Local_Pointer_Position;targetObject.localPosition = Panel_Local_Position + offsetToOriginal;}}public void OnEndDrag (PointerEventData eventData){canvasgroup.blocksRaycasts = true;}}