UGUI背包系统（下）

             背包系统已经完结。花了2天时间完成了这个背包系统，因为工作的原因拖了两天。上效果图：

上代码：

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


public class Item : MonoBehaviour,IPointerEnterHandler,IPointerExitHandler,IBeginDragHandler,IDragHandler,IEndDragHandler,ICanvasRaycastFilter {

private static Transform  canvas;
private Transform nowParent;
private bool isRaycast = true;


// Use this for initialization
void Start () {


if(canvas == null){


canvas = GameObject.Find ("Canvas").transform;
}
}

// Update is called once per frame
void Update () {

  }
  
    
public void SetIcon(int id){


this.GetComponent<Image> ().sprite = KnapsackManager._instance.itemSprite [id];
}


public void OnPointerEnter(PointerEventData data){


KnapsackManager._instance.isShow = true;
}
  
public void OnPointerExit(PointerEventData data){


KnapsackManager._instance.isShow = false;
}


public void OnBeginDrag(PointerEventData data){


nowParent = transform.parent;
transform.parent = canvas;
isRaycast = false;
}


public void OnDrag(PointerEventData data){


transform.position = Input.mousePosition;
}


public void OnEndDrag(PointerEventData data){

GameObject go = data.pointerCurrentRaycast.gameObject;


//当拖在有格子的地方时
if (go != null) {


Debug.Log (go.name);
//如果拖拽空格子里，就放在空格子里
if (go.tag.Equals("ItemParent")) {

SetPosition (transform, go.transform);
} else if (go.tag == "Item") {


SetPosition (transform, go.transform.parent);
SetPosition (go.transform, nowParent);
} else {

SetPosition (transform, nowParent);
}
} else {


SetPosition (transform, nowParent);
}
isRaycast = true;
}


void SetPosition(Transform item,Transform parent){


item.parent = parent;
item.position = parent.position;
}


public bool IsRaycastLocationValid(Vector2 sp,Camera eventCamera){


return isRaycast;
}
}

这个只是参考的背包系统，想要做好一点你可以自己扩展功能，或者代码质量好点。