[Unity3D学习]NGUI UIScrollView UIGrid性能优化

2014.06.20

之前用UIGrid 发现如果数据量大了。NGUI就会创建大量的GameObject. 这样肯定对性能消耗影响巨大，所以我自己优化了一下。这样效率可以提高很多。当然，优化过后UIGrid还是有一些不足，可惜暂时没有思路，以后有思路了。再接着继续。直接贴代码。

Demo : game.gamerisker.com/grid/

DownLoad : GridDemo 访问密码: o7bf

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

/// <summary>
/// @author : YangDan
/// @date : 2014-6-20
/// 
/// CustomGrid,这个类主要做了一件事,就是优化了,NGUI UIGrid 在数据量很多都时候,
///创建过多都GameObject对象,造成资源浪费.
/// 该类需要和 CustomScrollView.cs 以及 CustomDragScrollView.cs一起使用;
/// CustomScrollView 类只上把bounds字段给暴露出来，因为bounds都大小需要在外面设置了.
/// CustomDragScrollView 类 没有修改,
///因为默认都UIDragScrollView 默认里面调用都上UIScrollView 
///不能与我们都CustomScrollView兼容.
/// 所以只是将里面都UIScrollView 改为 CustomScrollView.
/// Item 是一个渲染操作类.可以自己定义,或者不要,并没有影响.
/// </summary>
/// 
public class CustomGrid : UIWidgetContainer
{
    public GameObject Item;

    public int m_cellHeight = 60;

    public int m_cellWidth = 700;

    private float m_height;

    private int m_maxLine;

    private Item[] m_cellList;

    private CustomScrollView mDrag;

    private float lastY = -1;

    private List<string> m_listData;

    private Vector3 defaultVec;

    void Awake()
    {
        m_listData = new List<string>();

        defaultVec = new Vector3(0, m_cellHeight, 0);

        mDrag = NGUITools.FindInParents<CustomScrollView>(gameObject);

        m_height = mDrag.panel.height;

        m_maxLine = Mathf.CeilToInt(m_height / m_cellHeight) + 1;

        m_cellList = new Item[m_maxLine];

        CreateItem();
    }

    void Update()
    {
        if (mDrag.transform.localPosition.y != lastY)
        {
            Validate();

            lastY = mDrag.transform.localPosition.y;
        }
    }

    private void UpdateBounds(int count)
    {
        Vector3 vMin = new Vector3();
        vMin.x = -transform.localPosition.x;
        vMin.y = transform.localPosition.y - count * m_cellHeight;
        vMin.z = transform.localPosition.z;
        Bounds b = new Bounds(vMin, Vector3.one);
        b.Encapsulate(transform.localPosition);

        mDrag.bounds = b;
        mDrag.UpdateScrollbars(true);
        mDrag.RestrictWithinBounds(true);
    }

    public void AddItem(string name)
    {
        m_listData.Add(name);

        Validate();

        UpdateBounds(m_listData.Count);
    }

    private void Validate()
    {
        Vector3 position = mDrag.panel.transform.localPosition;

        float _ver = Mathf.Max(position.y, 0);

        int startIndex = Mathf.FloorToInt(_ver / m_cellHeight);
        int endIndex = Mathf.Min(m_listData.Count, startIndex + m_maxLine);

        Item cell;
        int index = 0;
        for (int i = startIndex; i < startIndex + m_maxLine; i++)
        {
            cell = m_cellList[index];

            if (i < endIndex)
            {
                cell.text = m_listData[i];
                cell.transform.localPosition = new Vector3(0, i * -m_cellHeight, 0);
                cell.gameObject.SetActive(true);
            }
            else
            {
                cell.transform.localPosition = defaultVec;
            }

            index++;
        }
    }

    private void CreateItem()
    {
        for (int i = 0; i < m_maxLine; i++)
        {
            GameObject go;
            go = Instantiate(Item) as GameObject;
            go.transform.parent = transform;
            go.transform.localScale = Vector3.one;
            go.SetActive(false);
            go.name = "Item" + i;
            Item item = go.GetComponent<Item>();
            item.Init();
            m_cellList[i] = item;
        }
    }
}

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using UnityEngine;

using System.Collections;

using System.Collections.Generic;

/// <summary>

/// @author : YangDan

/// @date : 2014-6-20

///

/// CustomGrid,这个类主要做了一件事,就是优化了,NGUI UIGrid 在数据量很多都时候,

///创建过多都GameObject对象,造成资源浪费.

/// 该类需要和 CustomScrollView.cs 以及 CustomDragScrollView.cs一起使用;

/// CustomScrollView 类只上把bounds字段给暴露出来，因为bounds都大小需要在外面设置了.

/// CustomDragScrollView 类没有修改,

///因为默认都UIDragScrollView 默认里面调用都上UIScrollView

///不能与我们都CustomScrollView兼容.

/// 所以只是将里面都UIScrollView 改为 CustomScrollView.

/// Item 是一个渲染操作类.可以自己定义,或者不要,并没有影响.

/// </summary>

///

public class CustomGrid : UIWidgetContainer

{

public GameObject Item;

public int m_cellHeight = 60;

public int m_cellWidth = 700;

private float m_height;

private int m_maxLine;

private Item[] m_cellList;

private CustomScrollView mDrag;

private float lastY = -1;

private List<string> m_listData;

private Vector3 defaultVec;

void Awake()

{

m_listData = new List<string>();

defaultVec = new Vector3(0, m_cellHeight, 0);

mDrag = NGUITools.FindInParents<CustomScrollView>(gameObject);

m_height = mDrag.panel.height;

m_maxLine = Mathf.CeilToInt(m_height / m_cellHeight) + 1;

m_cellList = new Item[m_maxLine];

CreateItem();

}

void Update()

{

if (mDrag.transform.localPosition.y != lastY)

{

Validate();

lastY = mDrag.transform.localPosition.y;

}

private void UpdateBounds(int count)

{

Vector3 vMin = new Vector3();

vMin.x = -transform.localPosition.x;

vMin.y = transform.localPosition.y - count * m_cellHeight;

vMin.z = transform.localPosition.z;

Bounds b = new Bounds(vMin, Vector3.one);

b.Encapsulate(transform.localPosition);

mDrag.bounds = b;

mDrag.UpdateScrollbars(true);

mDrag.RestrictWithinBounds(true);

}

public void AddItem(string name)

{

m_listData.Add(name);

Validate();

UpdateBounds(m_listData.Count);

}

private void Validate()

{

Vector3 position = mDrag.panel.transform.localPosition;

float _ver = Mathf.Max(position.y, 0);

int startIndex = Mathf.FloorToInt(_ver / m_cellHeight);

int endIndex = Mathf.Min(m_listData.Count, startIndex + m_maxLine);

Item cell;

int index = 0;

for (int i = startIndex; i < startIndex + m_maxLine; i++)

{

cell = m_cellList[index];

if (i < endIndex)

{

cell.text = m_listData[i];

cell.transform.localPosition = new Vector3(0, i * -m_cellHeight, 0);

cell.gameObject.SetActive(true);

}

else

{

cell.transform.localPosition = defaultVec;

}

index++;

}

private void CreateItem()

{

for (int i = 0; i < m_maxLine; i++)

{

GameObject go;

go = Instantiate(Item) as GameObject;

go.transform.parent = transform;

go.transform.localScale = Vector3.one;

go.SetActive(false);

go.name = "Item" + i;

Item item = go.GetComponent<Item>();

item.Init();

m_cellList[i] = item;

}

using UnityEngine;
using System.Collections;

/// <summary>
/// 主初始化类
/// </summary>
public class Main : MonoBehaviour 
{
    public int count;
    public bool isUpdate = true;


    private CustomGrid grid;
    private int index = 0;
    private int i = 0;
    private UILabel label;

    void Awake()
    {
        grid = GetComponentInChildren<CustomGrid>();

        label = transform.FindChild("back/back/Label").GetComponent<UILabel>();
    }

	void Start () 
    {
        while (i < count)
        {
            Add("" + i++);
        }

        label.text = string.Format("创建 {0} 个Item", i.ToString());
	}

    

    void Update()
    {
        if (isUpdate)
        {

            if (index % 30 == 0)
            {
                Add(i.ToString());
                i++;

                label.text = string.Format("创建 {0} 个Item", i.ToString());
            }

            index++;
        }
    }

    private void Add(string text)
    {
        grid.AddItem(text);
    }
}

using UnityEngine;

using System.Collections;

/// <summary>

/// 主初始化类

/// </summary>

public class Main : MonoBehaviour

{

public int count;

public bool isUpdate = true;

private CustomGrid grid;

private int index = 0;

private int i = 0;

private UILabel label;

void Awake()

{

grid = GetComponentInChildren<CustomGrid>();

label = transform.FindChild("back/back/Label").GetComponent<UILabel>();

}

void Start ()

{

while (i < count)

{

Add("" + i++);

}

label.text = string.Format("创建 {0} 个Item", i.ToString());

}

void Update()

{

if (isUpdate)

{

if (index % 30 == 0)

{

Add(i.ToString());

i++;

label.text = string.Format("创建 {0} 个Item", i.ToString());

}

index++;

}

private void Add(string text)

{

grid.AddItem(text);

}

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System.Text.RegularExpressions;

/// <summary>
/// 子渲染处理类
/// </summary>
public class Item : MonoBehaviour 
{
    private UILabel label;

    public void Init()
    {
        label = transform.FindChild("Label").GetComponent<UILabel>();
    }

    /// <summary>
    /// 文本内容
    /// </summary>
    public string text
    {
        set 
        {
            label.text = value;
        }
    }
}

using UnityEngine;

using System.Collections;

using System.Collections.Generic;

using System.Text.RegularExpressions;

/// <summary>

/// 子渲染处理类

/// </summary>

public class Item : MonoBehaviour

{

private UILabel label;

public void Init()

{

label = transform.FindChild("Label").GetComponent<UILabel>();

}

/// <summary>

/// 文本内容

/// </summary>

public string text

{

set

{

label.text = value;

}

using UnityEngine;

/// <summary>
/// 自定义ScrollView 和 UIScrollView 基本相同
/// </summary>
public class CustomScrollView : MonoBehaviour
{
	public enum Movement
	{
		Horizontal,
		Vertical,
		Unrestricted,
		Custom,
	}

	public enum DragEffect
	{
		None,
		Momentum,
		MomentumAndSpring,
	}

	public enum ShowCondition
	{
		Always,
		OnlyIfNeeded,
		WhenDragging,
	}

	public delegate void OnDragFinished ();


	public Movement movement = Movement.Vertical;


	public DragEffect dragEffect = DragEffect.MomentumAndSpring;


	public bool restrictWithinPanel = true;


	public bool disableDragIfFits = false;

	public bool smoothDragStart = true;

	public bool iOSDragEmulation = true;

	public float scrollWheelFactor = 0.25f;

	public float momentumAmount = 35f;
	
	public UIScrollBar horizontalScrollBar;

	public UIScrollBar verticalScrollBar;

	public ShowCondition showScrollBars = ShowCondition.OnlyIfNeeded;

	public Vector2 customMovement = new Vector2(1f, 0f);

	public Vector2 relativePositionOnReset = Vector2.zero;

	public OnDragFinished onDragFinished;

	[HideInInspector][SerializeField] Vector3 scale = new Vector3(0f, 0f, 0f);

	Transform mTrans;
	UIPanel mPanel;
	Plane mPlane;
	Vector3 mLastPos;
	bool mPressed = false;
	Vector3 mMomentum = Vector3.zero;
	float mScroll = 0f;
	Bounds mBounds;
    //bool mCalculatedBounds = false;
	bool mShouldMove = false;
	bool mIgnoreCallbacks = false;
	int mDragID = -10;
	Vector2 mDragStartOffset = Vector2.zero;
	bool mDragStarted = false;

	public UIPanel panel { get { return mPanel; } }

	public Bounds bounds
	{
		get
		{
            return mBounds;
		}
        set
        {
            mBounds = value;
        }
	}

	public bool canMoveHorizontally
	{
		get
		{
			return movement == Movement.Horizontal ||
				movement == Movement.Unrestricted ||
				(movement == Movement.Custom && customMovement.x != 0f);
		}
	}

	public bool canMoveVertically
	{
		get
		{
			return movement == Movement.Vertical ||
				movement == Movement.Unrestricted ||
				(movement == Movement.Custom && customMovement.y != 0f);
		}
	}

	public virtual bool shouldMoveHorizontally
	{
		get
		{
			float size = bounds.size.x;
			if (mPanel.clipping == UIDrawCall.Clipping.SoftClip) size += mPanel.clipSoftness.x * 2f;
			return size > mPanel.width;
		}
	}

	public virtual bool shouldMoveVertically
	{
		get
		{
			float size = bounds.size.y;
			if (mPanel.clipping == UIDrawCall.Clipping.SoftClip) size += mPanel.clipSoftness.y * 2f;
			return size > mPanel.height;
		}
	}

	protected virtual bool shouldMove
	{
		get
		{
			if (!disableDragIfFits) return true;

			if (mPanel == null) mPanel = GetComponent<UIPanel>();
			Vector4 clip = mPanel.finalClipRegion;
			Bounds b = bounds;

			float hx = (clip.z == 0f) ? Screen.width  : clip.z * 0.5f;
			float hy = (clip.w == 0f) ? Screen.height : clip.w * 0.5f;

			if (canMoveHorizontally)
			{
				if (b.min.x < clip.x - hx) return true;
				if (b.max.x > clip.x + hx) return true;
			}

			if (canMoveVertically)
			{
				if (b.min.y < clip.y - hy) return true;
				if (b.max.y > clip.y + hy) return true;
			}
			return false;
		}
	}

	public Vector3 currentMomentum { get { return mMomentum; } set { mMomentum = value; mShouldMove = true; } }

	void Awake ()
	{
		mTrans = transform;
		mPanel = GetComponent<UIPanel>();

		if (mPanel.clipping == UIDrawCall.Clipping.None)
			mPanel.clipping = UIDrawCall.Clipping.ConstrainButDontClip;
		
		if (movement != Movement.Custom && scale.sqrMagnitude > 0.001f)
		{
			if (scale.x == 1f && scale.y == 0f)
			{
				movement = Movement.Horizontal;
			}
			else if (scale.x == 0f && scale.y == 1f)
			{
				movement = Movement.Vertical;
			}
			else if (scale.x == 1f && scale.y == 1f)
			{
				movement = Movement.Unrestricted;
			}
			else
			{
				movement = Movement.Custom;
				customMovement.x = scale.x;
				customMovement.y = scale.y;
			}
			scale = Vector3.zero;
#if UNITY_EDITOR
			UnityEditor.EditorUtility.SetDirty(this);
#endif
		}
		if (Application.isPlaying) mPanel.onChange += OnPanelChange;
	}

	void OnDestroy ()
	{
		if (Application.isPlaying && mPanel != null)
			mPanel.onChange -= OnPanelChange;
	}

	void OnPanelChange () { UpdateScrollbars(true); }

	void Start ()
	{
		if (Application.isPlaying)
		{
			UpdateScrollbars(true);

			if (horizontalScrollBar != null)
			{
				EventDelegate.Add(horizontalScrollBar.onChange, OnHorizontalBar);
				horizontalScrollBar.alpha = ((showScrollBars == ShowCondition.Always) || shouldMoveHorizontally) ? 1f : 0f;
			}

			if (verticalScrollBar != null)
			{
				EventDelegate.Add(verticalScrollBar.onChange, OnVerticalBar);
				verticalScrollBar.alpha = ((showScrollBars == ShowCondition.Always) || shouldMoveVertically) ? 1f : 0f;
			}
		}
	}

	public bool RestrictWithinBounds (bool instant) { return RestrictWithinBounds(instant, true, true); }

	public bool RestrictWithinBounds (bool instant, bool horizontal, bool vertical)
	{
		Bounds b = bounds;
		Vector3 constraint = mPanel.CalculateConstrainOffset(b.min, b.max);

		if (!horizontal) constraint.x = 0f;
		if (!vertical) constraint.y = 0f;

		if (constraint.magnitude > 1f)
		{
			if (!instant && dragEffect == DragEffect.MomentumAndSpring)
			{
				Vector3 pos = mTrans.localPosition + constraint;
				pos.x = Mathf.Round(pos.x);
				pos.y = Mathf.Round(pos.y);
				SpringPanel.Begin(mPanel.gameObject, pos, 13f);
			}
			else
			{
				MoveRelative(constraint);
				mMomentum = Vector3.zero;
				mScroll = 0f;
			}
			return true;
		}
		return false;
	}

	public void DisableSpring ()
	{
		SpringPanel sp = GetComponent<SpringPanel>();
		if (sp != null) sp.enabled = false;
	}

	public virtual void UpdateScrollbars (bool recalculateBounds)
	{
		if (mPanel == null) return;

		if (horizontalScrollBar != null || verticalScrollBar != null)
		{
			if (recalculateBounds)
			{
                //mCalculatedBounds = false;
				mShouldMove = shouldMove;
			}

			Bounds b = bounds;
			Vector2 bmin = b.min;
			Vector2 bmax = b.max;

			if (horizontalScrollBar != null && bmax.x > bmin.x)
			{
				Vector4 clip = mPanel.finalClipRegion;
				float extents = clip.z * 0.5f;

				if (mPanel.clipping == UIDrawCall.Clipping.SoftClip)
					extents -= mPanel.clipSoftness.x;

				float min = clip.x - extents - b.min.x;
				float max = b.max.x - extents - clip.x;

				float width = bmax.x - bmin.x;
				min = Mathf.Clamp01(min / width);
				max = Mathf.Clamp01(max / width);

				float sum = min + max;
				mIgnoreCallbacks = true;
				horizontalScrollBar.barSize = 1f - sum;
				horizontalScrollBar.value = (sum > 0.001f) ? min / sum : 0f;
				mIgnoreCallbacks = false;
			}

			if (verticalScrollBar != null && bmax.y > bmin.y)
			{
				Vector4 clip = mPanel.finalClipRegion;
				float extents = clip.w * 0.5f;

				if (mPanel.clipping == UIDrawCall.Clipping.SoftClip)
					extents -= mPanel.clipSoftness.y;

				float min = clip.y - extents - bmin.y;
				float max = bmax.y - extents - clip.y;

				float height = bmax.y - bmin.y;
				min = Mathf.Clamp01(min / height);
				max = Mathf.Clamp01(max / height);
				float sum = min + max;

				mIgnoreCallbacks = true;
				verticalScrollBar.barSize = 1f - sum;
				verticalScrollBar.value = (sum > 0.001f) ? 1f - min / sum : 0f;
				mIgnoreCallbacks = false;
			}
		}
		else if (recalculateBounds)
		{
            //mCalculatedBounds = false;
		}
	}

	public virtual void SetDragAmount (float x, float y, bool updateScrollbars)
	{
		DisableSpring();

		Bounds b = bounds;
		if (b.min.x == b.max.x || b.min.y == b.max.y) return;

		Vector4 clip = mPanel.finalClipRegion;
		clip.x = Mathf.Round(clip.x);
		clip.y = Mathf.Round(clip.y);
		clip.z = Mathf.Round(clip.z);
		clip.w = Mathf.Round(clip.w);

		float hx = clip.z * 0.5f;
		float hy = clip.w * 0.5f;
		float left = b.min.x + hx;
		float right = b.max.x - hx;
		float bottom = b.min.y + hy;
		float top = b.max.y - hy;

		if (mPanel.clipping == UIDrawCall.Clipping.SoftClip)
		{
			left -= mPanel.clipSoftness.x;
			right += mPanel.clipSoftness.x;
			bottom -= mPanel.clipSoftness.y;
			top += mPanel.clipSoftness.y;
		}

		float ox = Mathf.Lerp(left, right, x);
		float oy = Mathf.Lerp(top, bottom, y);

		ox = Mathf.Round(ox);
		oy = Mathf.Round(oy);

		if (!updateScrollbars)
		{
			Vector3 pos = mTrans.localPosition;
			if (canMoveHorizontally) pos.x += clip.x - ox;
			if (canMoveVertically) pos.y += clip.y - oy;
			mTrans.localPosition = pos;
		}

		if (canMoveHorizontally) clip.x = ox;
		if (canMoveVertically) clip.y = oy;

		Vector4 cr = mPanel.baseClipRegion;
		mPanel.clipOffset = new Vector2(clip.x - cr.x, clip.y - cr.y);

		if (updateScrollbars) UpdateScrollbars(false);
	}

	public void ResetPosition()
	{
		if (NGUITools.GetActive(this))
		{
            //mCalculatedBounds = false;
			SetDragAmount(relativePositionOnReset.x, relativePositionOnReset.y, false);
			SetDragAmount(relativePositionOnReset.x, relativePositionOnReset.y, true);
		}
	}

	void OnHorizontalBar ()
	{
		if (!mIgnoreCallbacks)
		{
			float x = (horizontalScrollBar != null) ? horizontalScrollBar.value : 0f;
			float y = (verticalScrollBar != null) ? verticalScrollBar.value : 0f;
			SetDragAmount(x, y, false);
		}
	}

	void OnVerticalBar ()
	{
		if (!mIgnoreCallbacks)
		{
			float x = (horizontalScrollBar != null) ? horizontalScrollBar.value : 0f;
			float y = (verticalScrollBar != null) ? verticalScrollBar.value : 0f;
			SetDragAmount(x, y, false);
		}
	}


	public virtual void MoveRelative (Vector3 relative)
	{
		mTrans.localPosition += relative;
		Vector2 co = mPanel.clipOffset;
		co.x -= relative.x;
		co.y -= relative.y;
		mPanel.clipOffset = co;
		UpdateScrollbars(false);
	}

	public void MoveAbsolute (Vector3 absolute)
	{
		Vector3 a = mTrans.InverseTransformPoint(absolute);
		Vector3 b = mTrans.InverseTransformPoint(Vector3.zero);
		MoveRelative(a - b);
	}

	public void Press (bool pressed)
	{
		if (smoothDragStart && pressed)
		{
			mDragStarted = false;
			mDragStartOffset = Vector2.zero;
		}

		if (enabled && NGUITools.GetActive(gameObject))
		{
			if (!pressed && mDragID == UICamera.currentTouchID) mDragID = -10;

            //mCalculatedBounds = false;
			mShouldMove = shouldMove;
			if (!mShouldMove) return;
			mPressed = pressed;

			if (pressed)
			{
				// Remove all momentum on press
				mMomentum = Vector3.zero;
				mScroll = 0f;

				// Disable the spring movement
				DisableSpring();

				// Remember the hit position
				mLastPos = UICamera.lastHit.point;

				// Create the plane to drag along
				mPlane = new Plane(mTrans.rotation * Vector3.back, mLastPos);

				// Ensure that we're working with whole numbers, keeping everything pixel-perfect
				Vector2 co = mPanel.clipOffset;
				co.x = Mathf.Round(co.x);
				co.y = Mathf.Round(co.y);
				mPanel.clipOffset = co;

				Vector3 v = mTrans.localPosition;
				v.x = Mathf.Round(v.x);
				v.y = Mathf.Round(v.y);
				mTrans.localPosition = v;
			}
			else
			{
				if (restrictWithinPanel && mPanel.clipping != UIDrawCall.Clipping.None && dragEffect == DragEffect.MomentumAndSpring)
					RestrictWithinBounds(false, canMoveHorizontally, canMoveVertically);

				if (!smoothDragStart || mDragStarted)
				{
					if (onDragFinished != null)
						onDragFinished();
				}
			}
		}
	}

	public void Drag ()
	{
		if (enabled && NGUITools.GetActive(gameObject) && mShouldMove)
		{
			if (mDragID == -10) mDragID = UICamera.currentTouchID;
			UICamera.currentTouch.clickNotification = UICamera.ClickNotification.BasedOnDelta;

			// Prevents the drag "jump". Contributed by 'mixd' from the Tasharen forums.
			if (smoothDragStart && !mDragStarted)
			{
				mDragStarted = true;
				mDragStartOffset = UICamera.currentTouch.totalDelta;
			}

			Ray ray = smoothDragStart ?
				UICamera.currentCamera.ScreenPointToRay(UICamera.currentTouch.pos - mDragStartOffset) :
				UICamera.currentCamera.ScreenPointToRay(UICamera.currentTouch.pos);

			float dist = 0f;

			if (mPlane.Raycast(ray, out dist))
			{
				Vector3 currentPos = ray.GetPoint(dist);
				Vector3 offset = currentPos - mLastPos;
				mLastPos = currentPos;

				if (offset.x != 0f || offset.y != 0f)
				{
					offset = mTrans.InverseTransformDirection(offset);

					if (movement == Movement.Horizontal)
					{
						offset.y = 0f;
						offset.z = 0f;
					}
					else if (movement == Movement.Vertical)
					{
						offset.x = 0f;
						offset.z = 0f;
					}
					else if (movement == Movement.Unrestricted)
					{
						offset.z = 0f;
					}
					else
					{
						offset.Scale((Vector3)customMovement);
					}
					offset = mTrans.TransformDirection(offset);
				}

				// Adjust the momentum
				mMomentum = Vector3.Lerp(mMomentum, mMomentum + offset * (0.01f * momentumAmount), 0.67f);

				// Move the scroll view
				if (!iOSDragEmulation)
				{
					MoveAbsolute(offset);	
				}
				else
				{
					Vector3 constraint = mPanel.CalculateConstrainOffset(bounds.min, bounds.max);

					if (constraint.magnitude > 1f)
					{
						MoveAbsolute(offset * 0.5f);
						mMomentum *= 0.5f;
					}
					else
					{
						MoveAbsolute(offset);
					}
				}

				// We want to constrain the UI to be within bounds
				if (restrictWithinPanel &&
					mPanel.clipping != UIDrawCall.Clipping.None &&
					dragEffect != DragEffect.MomentumAndSpring)
				{
					RestrictWithinBounds(true, canMoveHorizontally, canMoveVertically);
				}
			}
		}
	}

	public void Scroll (float delta)
	{
		if (enabled && NGUITools.GetActive(gameObject) && scrollWheelFactor != 0f)
		{
			DisableSpring();
			mShouldMove = shouldMove;
			if (Mathf.Sign(mScroll) != Mathf.Sign(delta)) mScroll = 0f;
			mScroll += delta * scrollWheelFactor;
		}
	}

	void LateUpdate ()
	{
		if (!Application.isPlaying) return;
		float delta = RealTime.deltaTime;

		// Fade the scroll bars if needed
		if (showScrollBars != ShowCondition.Always)
		{
			bool vertical = false;
			bool horizontal = false;

			if (showScrollBars != ShowCondition.WhenDragging || mDragID != -10 || mMomentum.magnitude > 0.01f)
			{
				vertical = shouldMoveVertically;
				horizontal = shouldMoveHorizontally;
			}

			if (verticalScrollBar)
			{
				float alpha = verticalScrollBar.alpha;
				alpha += vertical ? delta * 6f : -delta * 3f;
				alpha = Mathf.Clamp01(alpha);
				if (verticalScrollBar.alpha != alpha) verticalScrollBar.alpha = alpha;
			}

			if (horizontalScrollBar)
			{
				float alpha = horizontalScrollBar.alpha;
				alpha += horizontal ? delta * 6f : -delta * 3f;
				alpha = Mathf.Clamp01(alpha);
				if (horizontalScrollBar.alpha != alpha) horizontalScrollBar.alpha = alpha;
			}
		}

		// Apply momentum
		if (mShouldMove && !mPressed)
		{
			if (movement == Movement.Horizontal || movement == Movement.Unrestricted)
			{
				mMomentum -= mTrans.TransformDirection(new Vector3(mScroll * 0.05f, 0f, 0f));
			}
			else if (movement == Movement.Vertical)
			{
				mMomentum -= mTrans.TransformDirection(new Vector3(0f, mScroll * 0.05f, 0f));
			}
			else
			{
				mMomentum -= mTrans.TransformDirection(new Vector3(
					mScroll * customMovement.x * 0.05f,
					mScroll * customMovement.y * 0.05f, 0f));
			}

			if (mMomentum.magnitude > 0.0001f)
			{
				mScroll = NGUIMath.SpringLerp(mScroll, 0f, 20f, delta);

				// Move the scroll view
				Vector3 offset = NGUIMath.SpringDampen(ref mMomentum, 9f, delta);
				MoveAbsolute(offset);

				// Restrict the contents to be within the scroll view's bounds
				if (restrictWithinPanel && mPanel.clipping != UIDrawCall.Clipping.None)
					RestrictWithinBounds(false, canMoveHorizontally, canMoveVertically);
				
				if (mMomentum.magnitude < 0.0001f && onDragFinished != null) 
					onDragFinished();
				
				return;
			}
			else
			{
				mScroll = 0f;
				mMomentum = Vector3.zero;
			}
		}
		else mScroll = 0f;

		// Dampen the momentum
		NGUIMath.SpringDampen(ref mMomentum, 9f, delta);
	}

#if UNITY_EDITOR

    /// <summary>
    /// Draw a visible orange outline of the bounds.
    /// </summary>

    void OnDrawGizmos()
    {
        if (mPanel != null)
        {
            Bounds b = bounds;
            Gizmos.matrix = transform.localToWorldMatrix;
            Gizmos.color = new Color(1f, 0.4f, 0f);
            Gizmos.DrawWireCube(new Vector3(b.center.x, b.center.y, b.min.z), new Vector3(b.size.x, b.size.y, 0f));
        }
    }
#endif
}

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using UnityEngine;

/// <summary>

/// 自定义ScrollView 和 UIScrollView 基本相同

/// </summary>

public class CustomScrollView : MonoBehaviour

{

public enum Movement

{

Horizontal,

Vertical,

Unrestricted,

Custom,

}

public enum DragEffect

{

None,

Momentum,

MomentumAndSpring,

}

public enum ShowCondition

{

Always,

OnlyIfNeeded,

WhenDragging,

}

public delegate void OnDragFinished ();

public Movement movement = Movement.Vertical;

public DragEffect dragEffect = DragEffect.MomentumAndSpring;

public bool restrictWithinPanel = true;

public bool disableDragIfFits = false;

public bool smoothDragStart = true;

public bool iOSDragEmulation = true;

public float scrollWheelFactor = 0.25f;

public float momentumAmount = 35f;

public UIScrollBar horizontalScrollBar;

public UIScrollBar verticalScrollBar;

public ShowCondition showScrollBars = ShowCondition.OnlyIfNeeded;

public Vector2 customMovement = new Vector2(1f, 0f);

public Vector2 relativePositionOnReset = Vector2.zero;

public OnDragFinished onDragFinished;

[HideInInspector][SerializeField] Vector3 scale = new Vector3(0f, 0f, 0f);

Transform mTrans;

UIPanel mPanel;

Plane mPlane;

Vector3 mLastPos;

bool mPressed = false;

Vector3 mMomentum = Vector3.zero;

float mScroll = 0f;

Bounds mBounds;

//bool mCalculatedBounds = false;

bool mShouldMove = false;

bool mIgnoreCallbacks = false;

int mDragID = -10;

Vector2 mDragStartOffset = Vector2.zero;

bool mDragStarted = false;

public UIPanel panel { get { return mPanel; } }

public Bounds bounds

{

get

{

return mBounds;

}

set

{

mBounds = value;

}

public bool canMoveHorizontally

{

get

{

return movement == Movement.Horizontal ||

movement == Movement.Unrestricted ||

(movement == Movement.Custom && customMovement.x != 0f);

}

public bool canMoveVertically

{

get

{

return movement == Movement.Vertical ||

movement == Movement.Unrestricted ||

(movement == Movement.Custom && customMovement.y != 0f);

}

public virtual bool shouldMoveHorizontally

{

get

{

float size = bounds.size.x;

if (mPanel.clipping == UIDrawCall.Clipping.SoftClip) size += mPanel.clipSoftness.x * 2f;

return size > mPanel.width;

}

public virtual bool shouldMoveVertically

{

get

{

float size = bounds.size.y;

if (mPanel.clipping == UIDrawCall.Clipping.SoftClip) size += mPanel.clipSoftness.y * 2f;

return size > mPanel.height;

}

protected virtual bool shouldMove

{

get

{

if (!disableDragIfFits) return true;

if (mPanel == null) mPanel = GetComponent<UIPanel>();

Vector4 clip = mPanel.finalClipRegion;

Bounds b = bounds;

float hx = (clip.z == 0f) ? Screen.width : clip.z * 0.5f;

float hy = (clip.w == 0f) ? Screen.height : clip.w * 0.5f;

if (canMoveHorizontally)

{

if (b.min.x < clip.x - hx) return true;

if (b.max.x > clip.x + hx) return true;

}

if (canMoveVertically)

{

if (b.min.y < clip.y - hy) return true;

if (b.max.y > clip.y + hy) return true;

}

return false;

}

public Vector3 currentMomentum { get { return mMomentum; } set { mMomentum = value; mShouldMove = true; } }

void Awake ()

{

mTrans = transform;

mPanel = GetComponent<UIPanel>();

if (mPanel.clipping == UIDrawCall.Clipping.None)

mPanel.clipping = UIDrawCall.Clipping.ConstrainButDontClip;

if (movement != Movement.Custom && scale.sqrMagnitude > 0.001f)

{

if (scale.x == 1f && scale.y == 0f)

{

movement = Movement.Horizontal;

}

else if (scale.x == 0f && scale.y == 1f)

{

movement = Movement.Vertical;

}

else if (scale.x == 1f && scale.y == 1f)

{

movement = Movement.Unrestricted;

}

else

{

movement = Movement.Custom;

customMovement.x = scale.x;

customMovement.y = scale.y;

}

scale = Vector3.zero;

#if UNITY_EDITOR

UnityEditor.EditorUtility.SetDirty(this);

#endif

}

if (Application.isPlaying) mPanel.onChange += OnPanelChange;

}

void OnDestroy ()

{

if (Application.isPlaying && mPanel != null)

mPanel.onChange -= OnPanelChange;

}

void OnPanelChange () { UpdateScrollbars(true); }

void Start ()

{

if (Application.isPlaying)

{

UpdateScrollbars(true);

if (horizontalScrollBar != null)

{

EventDelegate.Add(horizontalScrollBar.onChange, OnHorizontalBar);

horizontalScrollBar.alpha = ((showScrollBars == ShowCondition.Always) || shouldMoveHorizontally) ? 1f : 0f;

}

if (verticalScrollBar != null)

{

EventDelegate.Add(verticalScrollBar.onChange, OnVerticalBar);

verticalScrollBar.alpha = ((showScrollBars == ShowCondition.Always) || shouldMoveVertically) ? 1f : 0f;

}

public bool RestrictWithinBounds (bool instant) { return RestrictWithinBounds(instant, true, true); }

public bool RestrictWithinBounds (bool instant, bool horizontal, bool vertical)

{

Bounds b = bounds;

Vector3 constraint = mPanel.CalculateConstrainOffset(b.min, b.max);

if (!horizontal) constraint.x = 0f;

if (!vertical) constraint.y = 0f;

if (constraint.magnitude > 1f)

{

if (!instant && dragEffect == DragEffect.MomentumAndSpring)

{

Vector3 pos = mTrans.localPosition + constraint;

pos.x = Mathf.Round(pos.x);

pos.y = Mathf.Round(pos.y);

SpringPanel.Begin(mPanel.gameObject, pos, 13f);

}

else

{

MoveRelative(constraint);

mMomentum = Vector3.zero;

mScroll = 0f;

}

return true;

}

return false;

}

public void DisableSpring ()

{

SpringPanel sp = GetComponent<SpringPanel>();

if (sp != null) sp.enabled = false;

}

public virtual void UpdateScrollbars (bool recalculateBounds)

{

if (mPanel == null) return;

if (horizontalScrollBar != null || verticalScrollBar != null)

{

if (recalculateBounds)

{

//mCalculatedBounds = false;

mShouldMove = shouldMove;

}

Bounds b = bounds;

Vector2 bmin = b.min;

Vector2 bmax = b.max;

if (horizontalScrollBar != null && bmax.x > bmin.x)

{

Vector4 clip = mPanel.finalClipRegion;

float extents = clip.z * 0.5f;

if (mPanel.clipping == UIDrawCall.Clipping.SoftClip)

extents -= mPanel.clipSoftness.x;

float min = clip.x - extents - b.min.x;

float max = b.max.x - extents - clip.x;

float width = bmax.x - bmin.x;

min = Mathf.Clamp01(min / width);

max = Mathf.Clamp01(max / width);

float sum = min + max;

mIgnoreCallbacks = true;

horizontalScrollBar.barSize = 1f - sum;

horizontalScrollBar.value = (sum > 0.001f) ? min / sum : 0f;

mIgnoreCallbacks = false;

}

if (verticalScrollBar != null && bmax.y > bmin.y)

{

Vector4 clip = mPanel.finalClipRegion;

float extents = clip.w * 0.5f;

if (mPanel.clipping == UIDrawCall.Clipping.SoftClip)

extents -= mPanel.clipSoftness.y;

float min = clip.y - extents - bmin.y;

float max = bmax.y - extents - clip.y;

float height = bmax.y - bmin.y;

min = Mathf.Clamp01(min / height);

max = Mathf.Clamp01(max / height);

float sum = min + max;

mIgnoreCallbacks = true;

verticalScrollBar.barSize = 1f - sum;

verticalScrollBar.value = (sum > 0.001f) ? 1f - min / sum : 0f;

mIgnoreCallbacks = false;

}

else if (recalculateBounds)

{

//mCalculatedBounds = false;

}

public virtual void SetDragAmount (float x, float y, bool updateScrollbars)

{

DisableSpring();

Bounds b = bounds;

if (b.min.x == b.max.x || b.min.y == b.max.y) return;

Vector4 clip = mPanel.finalClipRegion;

clip.x = Mathf.Round(clip.x);

clip.y = Mathf.Round(clip.y);

clip.z = Mathf.Round(clip.z);

clip.w = Mathf.Round(clip.w);

float hx = clip.z * 0.5f;

float hy = clip.w * 0.5f;

float left = b.min.x + hx;

float right = b.max.x - hx;

float bottom = b.min.y + hy;

float top = b.max.y - hy;

if (mPanel.clipping == UIDrawCall.Clipping.SoftClip)

{

left -= mPanel.clipSoftness.x;

right += mPanel.clipSoftness.x;

bottom -= mPanel.clipSoftness.y;

top += mPanel.clipSoftness.y;

}

float ox = Mathf.Lerp(left, right, x);

float oy = Mathf.Lerp(top, bottom, y);

ox = Mathf.Round(ox);

oy = Mathf.Round(oy);

if (!updateScrollbars)

{

Vector3 pos = mTrans.localPosition;

if (canMoveHorizontally) pos.x += clip.x - ox;

if (canMoveVertically) pos.y += clip.y - oy;

mTrans.localPosition = pos;

}

if (canMoveHorizontally) clip.x = ox;

if (canMoveVertically) clip.y = oy;

Vector4 cr = mPanel.baseClipRegion;

mPanel.clipOffset = new Vector2(clip.x - cr.x, clip.y - cr.y);

if (updateScrollbars) UpdateScrollbars(false);

}

public void ResetPosition()

{

if (NGUITools.GetActive(this))

{

//mCalculatedBounds = false;

SetDragAmount(relativePositionOnReset.x, relativePositionOnReset.y, false);

SetDragAmount(relativePositionOnReset.x, relativePositionOnReset.y, true);

}

void OnHorizontalBar ()

{

if (!mIgnoreCallbacks)

{

float x = (horizontalScrollBar != null) ? horizontalScrollBar.value : 0f;

float y = (verticalScrollBar != null) ? verticalScrollBar.value : 0f;

SetDragAmount(x, y, false);

}

void OnVerticalBar ()

{

if (!mIgnoreCallbacks)

{

float x = (horizontalScrollBar != null) ? horizontalScrollBar.value : 0f;

float y = (verticalScrollBar != null) ? verticalScrollBar.value : 0f;

SetDragAmount(x, y, false);

}

public virtual void MoveRelative (Vector3 relative)

{

mTrans.localPosition += relative;

Vector2 co = mPanel.clipOffset;

co.x -= relative.x;

co.y -= relative.y;

mPanel.clipOffset = co;

UpdateScrollbars(false);

}

public void MoveAbsolute (Vector3 absolute)

{

Vector3 a = mTrans.InverseTransformPoint(absolute);

Vector3 b = mTrans.InverseTransformPoint(Vector3.zero);

MoveRelative(a - b);

}

public void Press (bool pressed)

{

if (smoothDragStart && pressed)

{

mDragStarted = false;

mDragStartOffset = Vector2.zero;

}

if (enabled && NGUITools.GetActive(gameObject))

{

if (!pressed && mDragID == UICamera.currentTouchID) mDragID = -10;

//mCalculatedBounds = false;

mShouldMove = shouldMove;

if (!mShouldMove) return;

mPressed = pressed;

if (pressed)

{

// Remove all momentum on press

mMomentum = Vector3.zero;

mScroll = 0f;

// Disable the spring movement

DisableSpring();

// Remember the hit position

mLastPos = UICamera.lastHit.point;

// Create the plane to drag along

mPlane = new Plane(mTrans.rotation * Vector3.back, mLastPos);

// Ensure that we're working with whole numbers, keeping everything pixel-perfect

Vector2 co = mPanel.clipOffset;

co.x = Mathf.Round(co.x);

co.y = Mathf.Round(co.y);

mPanel.clipOffset = co;

Vector3 v = mTrans.localPosition;

v.x = Mathf.Round(v.x);

v.y = Mathf.Round(v.y);

mTrans.localPosition = v;

}

else

{

if (restrictWithinPanel && mPanel.clipping != UIDrawCall.Clipping.None && dragEffect == DragEffect.MomentumAndSpring)

RestrictWithinBounds(false, canMoveHorizontally, canMoveVertically);

if (!smoothDragStart || mDragStarted)

{

if (onDragFinished != null)

onDragFinished();

}

public void Drag ()

{

if (enabled && NGUITools.GetActive(gameObject) && mShouldMove)

{

if (mDragID == -10) mDragID = UICamera.currentTouchID;

UICamera.currentTouch.clickNotification = UICamera.ClickNotification.BasedOnDelta;

// Prevents the drag "jump". Contributed by 'mixd' from the Tasharen forums.

if (smoothDragStart && !mDragStarted)

{

mDragStarted = true;

mDragStartOffset = UICamera.currentTouch.totalDelta;

}

Ray ray = smoothDragStart ?

UICamera.currentCamera.ScreenPointToRay(UICamera.currentTouch.pos - mDragStartOffset) :

UICamera.currentCamera.ScreenPointToRay(UICamera.currentTouch.pos);

float dist = 0f;

if (mPlane.Raycast(ray, out dist))

{

Vector3 currentPos = ray.GetPoint(dist);

Vector3 offset = currentPos - mLastPos;

mLastPos = currentPos;

if (offset.x != 0f || offset.y != 0f)

{

offset = mTrans.InverseTransformDirection(offset);

if (movement == Movement.Horizontal)

{

offset.y = 0f;

offset.z = 0f;

}

else if (movement == Movement.Vertical)

{

offset.x = 0f;

offset.z = 0f;

}

else if (movement == Movement.Unrestricted)

{

offset.z = 0f;

}

else

{

offset.Scale((Vector3)customMovement);

}

offset = mTrans.TransformDirection(offset);

}

// Adjust the momentum

mMomentum = Vector3.Lerp(mMomentum, mMomentum + offset * (0.01f * momentumAmount), 0.67f);

// Move the scroll view

if (!iOSDragEmulation)

{

MoveAbsolute(offset);

}

else

{

Vector3 constraint = mPanel.CalculateConstrainOffset(bounds.min, bounds.max);

if (constraint.magnitude > 1f)

{

MoveAbsolute(offset * 0.5f);

mMomentum *= 0.5f;

}

else

{

MoveAbsolute(offset);

}

// We want to constrain the UI to be within bounds

if (restrictWithinPanel &&

mPanel.clipping != UIDrawCall.Clipping.None &&

dragEffect != DragEffect.MomentumAndSpring)

{

RestrictWithinBounds(true, canMoveHorizontally, canMoveVertically);

}

public void Scroll (float delta)

{

if (enabled && NGUITools.GetActive(gameObject) && scrollWheelFactor != 0f)

{

DisableSpring();

mShouldMove = shouldMove;

if (Mathf.Sign(mScroll) != Mathf.Sign(delta)) mScroll = 0f;

mScroll += delta * scrollWheelFactor;

}

void LateUpdate ()

{

if (!Application.isPlaying) return;

float delta = RealTime.deltaTime;

// Fade the scroll bars if needed

if (showScrollBars != ShowCondition.Always)

{

bool vertical = false;

bool horizontal = false;

if (showScrollBars != ShowCondition.WhenDragging || mDragID != -10 || mMomentum.magnitude > 0.01f)

{

vertical = shouldMoveVertically;

horizontal = shouldMoveHorizontally;

}

if (verticalScrollBar)

{

float alpha = verticalScrollBar.alpha;

alpha += vertical ? delta * 6f : -delta * 3f;

alpha = Mathf.Clamp01(alpha);

if (verticalScrollBar.alpha != alpha) verticalScrollBar.alpha = alpha;

}

if (horizontalScrollBar)

{

float alpha = horizontalScrollBar.alpha;

alpha += horizontal ? delta * 6f : -delta * 3f;

alpha = Mathf.Clamp01(alpha);

if (horizontalScrollBar.alpha != alpha) horizontalScrollBar.alpha = alpha;

}

// Apply momentum

if (mShouldMove && !mPressed)

{

if (movement == Movement.Horizontal || movement == Movement.Unrestricted)

{

mMomentum -= mTrans.TransformDirection(new Vector3(mScroll * 0.05f, 0f, 0f));

}

else if (movement == Movement.Vertical)

{

mMomentum -= mTrans.TransformDirection(new Vector3(0f, mScroll * 0.05f, 0f));

}

else

{

mMomentum -= mTrans.TransformDirection(new Vector3(

mScroll * customMovement.x * 0.05f,

mScroll * customMovement.y * 0.05f, 0f));

}

if (mMomentum.magnitude > 0.0001f)

{

mScroll = NGUIMath.SpringLerp(mScroll, 0f, 20f, delta);

// Move the scroll view

Vector3 offset = NGUIMath.SpringDampen(ref mMomentum, 9f, delta);

MoveAbsolute(offset);

// Restrict the contents to be within the scroll view's bounds

if (restrictWithinPanel && mPanel.clipping != UIDrawCall.Clipping.None)

RestrictWithinBounds(false, canMoveHorizontally, canMoveVertically);

if (mMomentum.magnitude < 0.0001f && onDragFinished != null)

onDragFinished();

return;

}

else

{

mScroll = 0f;

mMomentum = Vector3.zero;

}

else mScroll = 0f;

// Dampen the momentum

NGUIMath.SpringDampen(ref mMomentum, 9f, delta);

}

#if UNITY_EDITOR

/// <summary>

/// Draw a visible orange outline of the bounds.

/// </summary>

void OnDrawGizmos()

{

if (mPanel != null)

{

Bounds b = bounds;

Gizmos.matrix = transform.localToWorldMatrix;

Gizmos.color = new Color(1f, 0.4f, 0f);

Gizmos.DrawWireCube(new Vector3(b.center.x, b.center.y, b.min.z), new Vector3(b.size.x, b.size.y, 0f));

}

#endif

}

using UnityEngine;
using System.Collections;

/// <summary>
/// 子类拖到处理类
/// </summary>
public class CustomDragScrollView : MonoBehaviour
{

	public CustomScrollView scrollView;

    [HideInInspector]
    [SerializeField]
    CustomScrollView draggablePanel;

	Transform mTrans;
    CustomScrollView mScroll;
	bool mAutoFind = false;


	void OnEnable ()
	{
		mTrans = transform;

        if (scrollView == null && draggablePanel != null)
		{
			scrollView = draggablePanel;
			draggablePanel = null;
		}
		FindScrollView();
	}

	void FindScrollView ()
	{

        CustomScrollView sv = NGUITools.FindInParents<CustomScrollView>(mTrans);

		if (scrollView == null)
		{
			scrollView = sv;
			mAutoFind = true;
		}
		else if (scrollView == sv)
		{
			mAutoFind = true;
		}
		mScroll = scrollView;
	}


	void Start () { FindScrollView(); }


	void OnPress (bool pressed)
	{
		if (mAutoFind && mScroll != scrollView)
		{
			mScroll = scrollView;
			mAutoFind = false;
		}

		if (scrollView && enabled && NGUITools.GetActive(gameObject))
		{
			scrollView.Press(pressed);
			
			if (!pressed && mAutoFind)
			{
                scrollView = NGUITools.FindInParents<CustomScrollView>(mTrans);
				mScroll = scrollView;
			}
		}
	}


	void OnDrag (Vector2 delta)
	{
		if (scrollView && NGUITools.GetActive(this))
			scrollView.Drag();
	}

	void OnScroll (float delta)
	{
		if (scrollView && NGUITools.GetActive(this))
			scrollView.Scroll(delta);
	}
}

using UnityEngine;

using System.Collections;

/// <summary>

/// 子类拖到处理类

/// </summary>

public class CustomDragScrollView : MonoBehaviour

{

public CustomScrollView scrollView;

[HideInInspector]

[SerializeField]

CustomScrollView draggablePanel;

Transform mTrans;

CustomScrollView mScroll;

bool mAutoFind = false;

void OnEnable ()

{

mTrans = transform;

if (scrollView == null && draggablePanel != null)

{

scrollView = draggablePanel;

draggablePanel = null;

}

FindScrollView();

}

void FindScrollView ()

{

CustomScrollView sv = NGUITools.FindInParents<CustomScrollView>(mTrans);

if (scrollView == null)

{

scrollView = sv;

mAutoFind = true;

}

else if (scrollView == sv)

{

mAutoFind = true;

}

mScroll = scrollView;

}

void Start () { FindScrollView(); }

void OnPress (bool pressed)

{

if (mAutoFind && mScroll != scrollView)

{

mScroll = scrollView;

mAutoFind = false;

}

if (scrollView && enabled && NGUITools.GetActive(gameObject))

{

scrollView.Press(pressed);

if (!pressed && mAutoFind)

{

scrollView = NGUITools.FindInParents<CustomScrollView>(mTrans);

mScroll = scrollView;

}

void OnDrag (Vector2 delta)

{

if (scrollView && NGUITools.GetActive(this))

scrollView.Drag();

}

void OnScroll (float delta)

{

if (scrollView && NGUITools.GetActive(this))

scrollView.Scroll(delta);

}

17 Comments

prince says:

2014 年 6 月 30 日 at am 8:50

Hi,

I’m interested in this article but I can’t read Chinese, so could you explain the main point that you optimized the UIScrollView?

Thank you.

Reply
- YangDan says:
  
  2014 年 6 月 30 日 at pm 8:44
  
  I mainly optimized Item are reused. Look at the core code “private void Validate ()”
  
  Reply
gakaki says:

2014 年 7 月 9 日 at pm 2:18

大哥源码消失了能不能上传到github或者oschina呢还可以给你改进 qq 82506111

Reply
黄 says:

2014 年 10 月 30 日 at pm 3:02

我想请教下，如果grid一行多列的特性怎么实现数据的更新，例如：1行4列

Reply
- YangDan says:
  
  2014 年 11 月 2 日 at pm 10:01
  
  其实原理都是一样的，行和列没有关系，只是修改一下xy的问题。请仔细查看CustomGrid 的 Validate方法，相信你能找到答案。
  
  Reply
- 林 says:
  
  2015 年 1 月 4 日 at pm 2:31
  
  你好，你解决那个多行多列的循环利用了吗？
  
  Reply
  - YangDan says:
    
    2015 年 1 月 5 日 at am 10:44
    
    你需要的是表格的多行多列的形式吗？如果是这个，我没有做喔。目前还没遇到这个需求
    
    Reply
argen says:

2014 年 11 月 14 日 at pm 3:53

你好，我用了你的这个优化的grid，但有个问题是如果grid的item比较复杂的话在滑动后就会显示不出来了，第一屏是可以显示的，因为是测试，所以滑动的时候也没有去改变item的值，只是验证性能，但滑动后就是显示不了，这是什么原因呢，能给个思路吗？
非常感谢

Reply
- YangDan says:
  
  2014 年 11 月 15 日 at pm 3:44
  
  谢谢，感谢你的使用！
  
  item 最终的渲染是在Validate这个方法里面，如果不显示，有可能是Item的坐标计算不对，处于可视范围以外造成的，你可以看看item的坐标。item的显示与它复杂没关系。
  
  如果有还是出现问题，可以直接联系我：QQ：133523686（注明来意 3Q）
  
  Reply
  - argen says:
    
    2014 年 11 月 17 日 at pm 3:46
    
    是我搞错了，是我把 UIPanel 的 static 选项勾上了导致的
    
    Reply
黄 says:

2014 年 11 月 17 日 at pm 2:05

已搞定，很不错的优化，3Q

Reply
星洲 says:

2015 年 1 月 27 日 at pm 8:25

感谢！

Reply
大众 says:

2015 年 3 月 3 日 at pm 2:55

你好请问这个有打unity包吗？初学者很感兴趣，想学习一下，谢谢！

Reply
- YangDan says:
  
  2015 年 3 月 3 日 at pm 4:10
  
  文章上面有一个下载链接，不能用了吗？不好意思现在在公司不方便访问云盘。你可以自己试试，如果还不行，我晚上回去会更新一下下载地址！
  
  Reply
  - 大众 says:
    
    2015 年 3 月 3 日 at pm 6:36
    
    不，能用，我没看清谢谢
    
    Reply
kason says:

2015 年 8 月 12 日 at pm 4:23

Assets/Grid/CustomScrollView.cs(202,32): error CS1061: Type UIPanel' does not contain a definition for onChange’ and no extension method onChange' of type UIPanel’ could be found (are you missing a using directive or an assembly reference?)

ngui3.5.8版本不知道哪个方法可以替代这个

Reply
- GameRisker says:
  
  2015 年 8 月 12 日 at pm 7:11
  
  你好，因为我手里没有3.5.8版本，无法明确告诉你用哪个方法替代，我只能给你一些建议，请你详细的看一下CustomGrid.cs类的头注释，CustomScrollView类，你应该可以直接使用3.5.8版本的只需要把bounds改为外部赋值，其他的依然用原来的类代码。慢慢的改一下相信你也能运行起来的，祝你成功！
  
  Reply

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[Unity3D学习]NGUI UIScrollView UIGrid性能优化

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