【Unity3D】【NGUI】grid下面的item的重复利用

NGUI讨论群：333417608

解决的问题

使用grid放置item的时候，每次数据可能都不一样，但是每次都删除grid下面的节点，之后动态创建新的item是比较浪费的。

写个简单的工具函数，原理很简单。

1、先获得grid下面的可用item

2、根据data的大小进行初始化

3、每次在可用的item列表里面获取新的item，如果不够用了，，就创建新的item

4、disable掉没用的item

附：每个grid下面预先要有一个名字包含“Template_”的模板item。这个模板不会被用，之前尝试过把这个模板也当做一个item正常使用，但是有些NGUI的widget会出现BUG。

using UnityEngine;using System.Collections.Generic;//qq group :333417608public class UITools{/* usage:List<GameObject> canUseList = UITools.GetCanUseItemList(gridRoot);for (int i=0; i<totalData.Length; ++i){GameObject go = UITools.GetNewItemObj(canUseList, gridRoot, prefab);// do init}UITools.UnActiveUnuseItem(canUseList);// prefab is the template */ static public GameObject GetNewItemObj (List<GameObject> canUseList, GameObject root, GameObject prefab){GameObject go = null;if (canUseList.Count > 0) {go = canUseList [0];canUseList.RemoveAt (0);} else {go = NGUITools.AddChild (root, prefab);}NGUITools.SetActiveSelf (go, true);return go;}static public T GetNewItemObj<T> (List<T> canUseList, GameObject root, GameObject prefab) where T : Component{T item = null;if (canUseList.Count > 0) {item = canUseList [0];canUseList.RemoveAt (0);} else {item = NGUITools.AddChild (root, prefab).GetComponent<T>();}item.name = string.Format("{0:D3}", 0);NGUITools.SetActiveSelf (item.gameObject, true);return item;}static public List<GameObject> GetCanUseItemList (GameObject root){List<GameObject> itemList = new List<GameObject> ();Transform rootT = root.transform;for (int i=0; i<rootT.childCount; ++i) {GameObject go = rootT.GetChild (i).gameObject;if (IsNotTemplateGameObject(go)){itemList.Add (go);}}return itemList;}static public List<T> GetCanUseItemList<T> (GameObject root) where T : Component{List<T> childrenList = new List<T> ();Transform rootT = root.transform;for (int i=0; i<rootT.childCount; ++i) {Transform child = rootT.GetChild (i);T t = child.GetComponent<T> ();if (t != null && IsNotTemplateGameObject(child.gameObject)) {childrenList.Add (t);}}return childrenList;}static public void UnActiveUnuseItem (List<GameObject> canUseList){foreach (var item in canUseList) {NGUITools.SetActiveSelf (item, false);}}static public void UnActiveUnuseItem<T> (List<T> canUseList) where T : Component{foreach (var item in canUseList) {NGUITools.SetActiveSelf (item.gameObject, false);}}static private bool IsNotTemplateGameObject(GameObject go){bool result = !go.name.ToLower().Contains("template_");if (!result && go.activeSelf){NGUITools.SetActiveSelf(go, false);}return result;}}

数最亮的星。如果有可能，我带你去远行。