最近由于工作需要学习UNITY3D，对于做PHP的程序猿挑战性灰常大，unity3D国内相关资料少得可怜唉！
根据需求做个防“天天爱消除”主界面左右滑动窗体的效果，百度搜到雨凇大神的一个帖子
NGUI研究院之自制 Scroll View实现触摸滚动相册效果（四）
不过效果不怎么理想，没有平滑的spring动画。研究NGUI自带的Example 7 - Scroll View (Panel) 例子
实现了如下效果：
UIDragSlider.cs
using UnityEngine;
/// <summary>
/// Ever wanted to be able to auto-center on an object within a draggable panel?
/// Attach this script to the container that has the objects to center on as its children.
/// </summary>
//[AddComponentMenu("NGUI/Interaction/Center On Child")]
public class UIDragSlider : MonoBehaviour
{
/// <summary>
/// The strength of the spring.
/// </summary>
public float springStrength = 8f;
/// <summary>
/// Callback to be triggered when the centering operation completes.
/// </summary>
public SpringPanel.OnFinished onFinished;
//用来放置灰色、白色小点
public Transform ponit;
//白色的小点
public GameObject prefabMaskDot;
//灰色的小点
public GameObject prefabBaseDot;
//白色小点的临时对象
private GameObject maskDot;
//灰色、白色小点下方的起始位置。
int start;
UIDraggablePanel mDrag;
GameObject mCenteredObject;
/// <summary>
/// Game object that the draggable panel is currently centered on.
/// </summary>
public GameObject centeredObject { get { return mCenteredObject; } }
void OnEnable ()
{
Recenter ();
//initSlider ();
}
void Start ()
{
initSlider ();
}
void OnDragFinished ()
{
if (enabled)
Recenter ();
}
/// <summary>
/// Recenter the draggable list on the center-most child.
/// </summary>
public void Recenter ()
{
if (mDrag == null) {
mDrag = NGUITools.FindInParents<UIDraggablePanel> (gameObject);
//mDrag = GameObject.Find("UIPanel (Clipped View)").GetComponent<UIDraggablePanel>();
if (mDrag == null) {
Debug.LogWarning (GetType () + " requires " + typeof(UIDraggablePanel) + " on a parent object in order to work", this);
enabled = false;
return;
} else {
//mDrag = mDrag.GetComponent<UIDraggablePanel>();
mDrag.onDragFinished = OnDragFinished;
//Debug.Log(mDrag.panel);
if (mDrag.horizontalScrollBar != null)
mDrag.horizontalScrollBar.onDragFinished = OnDragFinished;
if (mDrag.verticalScrollBar != null)
mDrag.verticalScrollBar.onDragFinished = OnDragFinished;
}
}
if (mDrag.panel == null)
return;
// Calculate the panel's center in world coordinates
Vector4 clip = mDrag.panel.clipRange;
Transform dt = mDrag.panel.cachedTransform;
Vector3 center = dt.localPosition;
center.x += clip.x;
center.y += clip.y;
center = dt.parent.TransformPoint (center);
// Offset this value by the momentum
Vector3 offsetCenter = center - mDrag.currentMomentum * (mDrag.momentumAmount * 0.1f);
mDrag.currentMomentum = Vector3.zero;
float min = float.MaxValue;
Transform closest = null;
Transform trans = transform;
// Determine the closest child
for (int i = 0, imax = trans.childCount; i < imax; ++i) {
Transform t = trans.GetChild (i);
float sqrDist = Vector3.SqrMagnitude (t.position - offsetCenter);
if (sqrDist < min) {
min = sqrDist;
closest = t;
}
}
if (closest != null) {
Debug.Log (closest.gameObject.name);
mCenteredObject = closest.gameObject;
// Figure out the difference between the chosen child and the panel's center in local coordinates
Vector3 cp = dt.InverseTransformPoint (closest.position);
Vector3 cc = dt.InverseTransformPoint (center);
Vector3 offset = cp - cc;
// Offset shouldn't occur if blocked by a zeroed-out scale
if (mDrag.scale.x == 0f)
offset.x = 0f;
if (mDrag.scale.y == 0f)
offset.y = 0f;
if (mDrag.scale.z == 0f)
offset.z = 0f;
// Spring the panel to this calculated position
SpringPanel.Begin (mDrag.gameObject, dt.localPosition - offset, springStrength).onFinished = onFinished;
//两个方法一个设置名字
//获取当前下标
/*
int index=0;
foreach(Transform child in transform){
if(child.gameObject==closest.gameObject){
Debug.Log("index:"+index);
setMaskPos(index);
}
index++;
}
*/
//第二个方法需要命名
string[] indexName = closest.gameObject.name.Split ('_');
setMaskPos (int.Parse (indexName [1]));
} else
mCenteredObject = null;
}
void initSlider ()
{
//因为下方灰色 白色的小点需要根据相册列表的数量来计算居中显示
int size = transform.childCount;
//乘以16表示计算所有小点加起来的宽度
int length = (size - 1) * 17;
//得到下方灰色 白色 小点的居中起始位置
start = (-length) >> 1;
for (int i=0; i< size; i++) {
//把每一个灰色小点加入3D世界
GameObject hui = (GameObject)Instantiate (prefabBaseDot);
//设置灰色小点的父类为另外一个面板
hui.transform.parent = ponit;
//设置每一个灰色小点的位置与缩放，总之让它们居中排列显示在相册列表下方。
hui.transform.localPosition = new Vector3 (start + i * 24, -240f, 0f);
hui.transform.localScale = new Vector3 (17, 17, 1);
//深度 因为是先在屏幕下方绘制4个灰色的小点， 然后在灰色上面绘制白色小点
//表示当前的窗口ID 所以深度是为了设置白色小点在灰色小点之上绘制
hui.GetComponent<UISprite> ().depth = 0;
}
//把白色小点也加载在3D世界中
maskDot = (GameObject)Instantiate (prefabMaskDot);
//设置它的深度高于 灰色小点，让白色小点显示在灰色小点之上
maskDot.GetComponent<UISprite> ().depth = 1;
//设置白色小点的开始位置
setMaskPos (0);
}
void setMaskPos (int index)
{
maskDot.transform.parent = ponit;
maskDot.transform.localPosition = new Vector3 (start + index * 24, -240f, -10f);
maskDot.transform.localScale = new Vector3 (17, 17, 1);
}
} 
如有疑问请站内
来源：oschina
链接：https://my.oschina.net/u/148563/blog/153494