using UnityEngine;
using System.Collections;
using UnityEngine.EventSystems;public class DragOnPic : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler
{//记录下自己的父物体.
    Transform myParent;//Panel，使拖拽是显示在最上方.
    Transform tempParent;CanvasGroup cg;RectTransform rt;//记录鼠标位置.
    Vector3 newPosition;void Awake(){//添加CanvasGroup组件用于在拖拽是忽略自己，从而检测到被交换的图片.cg = this.gameObject.AddComponent<CanvasGroup>();rt = this.GetComponent<RectTransform>();tempParent = GameObject.Find("Canvas").transform;}/// <summary>/// Raises the begin drag event./// </summary>public void OnBeginDrag(PointerEventData eventData){//拖拽开始时记下自己的父物体.myParent = transform.parent;//拖拽开始时禁用检测.cg.blocksRaycasts = false;this.transform.SetParent(tempParent);}/// <summary>/// Raises the drag event./// </summary>void IDragHandler.OnDrag(PointerEventData eventData){//推拽是图片跟随鼠标移动.RectTransformUtility.ScreenPointToWorldPointInRectangle(rt, Input.mousePosition, eventData.enterEventCamera, out newPosition);transform.position = newPosition;}/// <summary>/// Raises the end drag event./// </summary>public void OnEndDrag(PointerEventData eventData){//获取鼠标下面的物体.GameObject target = eventData.pointerEnter;//如果能检测到物体.if (target){//如果检测到图片，则交换父物体并重置位置.GameManager.SetParent(this.transform, target.transform, myParent);}else{this.transform.SetParent(myParent);this.transform.localPosition = Vector3.zero;}//拖拽结束时启用检测.cg.blocksRaycasts = true;//检测是否完成拼图.if (GameManager.CheckWin()){Debug.Log("Win!!!");}if (!GameManager.CheckWin()){Debug.Log("没拼好");}}}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;public class GameManager
{/// <summary>/// Randoms the array./// </summary>static public void RandomArray(Sprite[] sprites){for (int i = 0; i < sprites.Length; i++){//随机抽取数字中的一个位置，并将这张图片与第i张图片交换.int index = Random.Range(i, sprites.Length);Sprite temp = sprites[i];sprites[i] = sprites[index];sprites[index] = temp;}}/// <summary>/// Sets the parent./// </summary>static public void SetParent(Transform mine, Transform target, Transform oldParent){//如果检测到图片，则交换父物体并重置位置.switch (target.tag){case "Cell":mine.SetParent(target.parent);target.SetParent(oldParent);mine.localPosition = Vector3.zero;target.localPosition = Vector3.zero;break;default:mine.SetParent(oldParent);mine.localPosition = Vector3.zero;break;}}/// <summary>/// Checks is win./// </summary>static public bool CheckWin(){for (int i = 0; i < ImageCreater._instance.transform.childCount; i++){if (ImageCreater._instance.transform.GetChild(i).name != ImageCreater._instance.transform.GetChild(i).transform.GetChild(0).name){return false;}}return true;}
}

using UnityEngine;
using System.Collections;
using UnityEngine.UI;public class ImageCreater : MonoBehaviour
{//单例模式public static ImageCreater _instance;//存储裁剪好图片的数组.public Sprite[] sprites;//格子的预设体.public GameObject cellPrefab;void Start(){_instance = this;CreateImages();}private void CreateImages(){//将图片数组随机排列.
        GameManager.RandomArray(sprites);//生产图片.for (int i = 0; i < sprites.Length; i++){//通过预设体生成图片.GameObject cell = (GameObject)Instantiate(cellPrefab);//设置cell的名字方便检测是否完成拼图.cell.name = i.ToString();//获取cell的子物体.Transform image = cell.transform.GetChild(0);//设置显示的图片.image.GetComponent<Image>().sprite = sprites[i];//设置子物体的名称，方便检测是否完成拼图.int tempIndex = sprites[i].name.LastIndexOf('_');image.name = sprites[i].name.Substring(tempIndex + 1);//将Cell设置为Panel的子物体.cell.transform.SetParent(this.transform);//初始化大小.cell.transform.localScale = Vector3.one;}}}