NGUI优化ScroolView中Grid子级太多导致的滑动问题

来源：互联网发布：收银软件交流群编辑：程序博客网时间：2024/06/05 17:04
当ScrollView中Grid子级太多的时候，会导致卡顿的效果。通过重写MultiRowWrapContent的函数即可有效解决。只需要在Grid上绑定这一个脚本，填写Item的数量，以及单元格大小，滑动的时候就会自动调整Item位置，来实现完美的显示效果。
using UnityEngine;public class MultiRowWrapContent : UIWrapContent{    /// <summary>    /// 根据数据设置大小    /// </summary>    /// <param name="showCount">最多显示的大小</param>    /// <param name="dataCount">数据长度</param>    public void SetCurData(int showCount,int dataCount)    {        minIndex = 0;        maxIndex = dataCount - 1;        if (maxIndex < (showCount-1))        {            maxIndex = showCount-1;        }    }    public void mFWrapContent()    {        //itemSizeH = 180;        mFirstTime = true;        SortBasedOnScrollMovement();        WrapContent();        mFirstTime = false;    }    protected override void ResetChildPositions()    {        for (int i = 0, imax = mChildren.Count; i < imax; ++i)        {            Transform t = mChildren[i];            int x = i * itemSize;            int y = 0;            if (!mHorizontal)            {                x = (i % RowNum) * itemSize;                y = -(i / RowNum) * itemSizeH;                int index = int.Parse(t.gameObject.name.Substring(4,2));//item00                if (index % 4 == 0)                    Debug.Log(i+t.gameObject.name+": " + y);            }            t.localPosition = new Vector3(x, y, 0);            UpdateItem(t, i);        }    }    protected override void UpdateItem(Transform item, int index)    {        if (onInitializeItem != null)        {            int yIndex = Mathf.Abs(Mathf.RoundToInt(item.localPosition.y / itemSize));            int xIndex = Mathf.Abs(Mathf.RoundToInt(item.localPosition.x / itemSize));            int realIndex = RowNum * yIndex + xIndex;            onInitializeItem(item.gameObject, index, realIndex);        }    }    public override void SortBasedOnScrollMovement()    {        if (!CacheScrollView()) return;        // Cache all children and place them in order        mChildren.Clear();        for (int i = 0; i < mTrans.childCount; ++i)        {            Transform t = mTrans.GetChild(i);            if (hideInactive && !t.gameObject.activeInHierarchy) continue;            mChildren.Add(t);        }        ResetChildPositions();    }    public override void WrapContent()    {        float extents = itemSize * (mChildren.Count / RowNum) * 0.5f;        Vector3[] corners = mPanel.worldCorners;        for (int i = 0; i < 4; ++i)        {            Vector3 v = corners[i];            v = mTrans.InverseTransformPoint(v);            corners[i] = v;        }        Vector3 center = Vector3.Lerp(corners[0], corners[2], 0.5f);        bool allWithinRange = true;        float ext2 = extents * 2f;        if (mHorizontal)        {            float min = corners[0].x - itemSize;            float max = corners[2].x + itemSize;            for (int i = 0, imax = mChildren.Count; i < imax; ++i)            {                Transform t = mChildren[i];                float distance = t.localPosition.x - center.x;                if (distance < -extents)                {                    Vector3 pos = t.localPosition;                    pos.x += ext2;                    distance = pos.x - center.x;                    int realIndex = Mathf.RoundToInt(pos.x / itemSize);                    if (minIndex == maxIndex || (minIndex <= realIndex && realIndex <= maxIndex))                    {                        t.localPosition = pos;                        UpdateItem(t, i);                    }                    else allWithinRange = false;                }                else if (distance > extents)                {                    Vector3 pos = t.localPosition;                    pos.x -= ext2;                    distance = pos.x - center.x;                    int realIndex = Mathf.RoundToInt(pos.x / itemSize);                    if (minIndex == maxIndex || (minIndex <= realIndex && realIndex <= maxIndex))                    {                        t.localPosition = pos;                        UpdateItem(t, i);                    }                    else allWithinRange = false;                }                else if (mFirstTime) UpdateItem(t, i);                if (cullContent)                {                    distance += mPanel.clipOffset.x - mTrans.localPosition.x;                    if (!UICamera.IsPressed(t.gameObject))                        NGUITools.SetActive(t.gameObject, (distance > min && distance < max), false);                }            }        }        else        {            extents = itemSizeH * (mChildren.Count / RowNum) * 0.5f;            ext2 = extents * 2f;            float min = corners[0].y - itemSizeH;            float max = corners[2].y + itemSizeH;            for (int i = 0, imax = mChildren.Count; i < imax; ++i)            {                Transform t = mChildren[i];                float distance = t.localPosition.y - center.y;                           if (distance < -extents)                {                    Vector3 pos = t.localPosition;                    pos.y += ext2;                    distance = pos.y - center.y;                    int yIndex = -Mathf.RoundToInt(pos.y / itemSizeH);                    int xIndex = -Mathf.RoundToInt(pos.x / itemSize);                    int realIndex = RowNum * yIndex;                                    if (minIndex == maxIndex || (minIndex <= realIndex && realIndex <= maxIndex))                    {                        t.localPosition = pos;                        UpdateItem(t, i);                    }                    else allWithinRange = false;                }                else if (distance > extents)                {                    Vector3 pos = t.localPosition;                    pos.y -= ext2;                    distance = pos.y - center.y;                 //   int realIndex = Mathf.RoundToInt(pos.y / itemSize);                  //  int yIndex = Mathf.Abs(Mathf.RoundToInt(pos.y / itemSize));                   // int xIndex = Mathf.Abs(Mathf.RoundToInt(pos.x / itemSize));                    int yIndex = -Mathf.RoundToInt(pos.y / itemSizeH);                    int xIndex = -Mathf.RoundToInt(pos.x / itemSize);                    int realIndex = RowNum * yIndex;                                        if (minIndex == maxIndex || (minIndex <= realIndex && realIndex <= maxIndex))                    {                        t.localPosition = pos;                        UpdateItem(t, i);                    }                    else allWithinRange = false;                }                else if (mFirstTime) UpdateItem(t, i);                if (cullContent)                {                    distance += mPanel.clipOffset.y - mTrans.localPosition.y;                    if (!UICamera.IsPressed(t.gameObject))                        NGUITools.SetActive(t.gameObject, (distance > min && distance < max), false);                }            }        }        mScroll.restrictWithinPanel = !allWithinRange;        mScroll.InvalidateBounds();    }}
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