Unity3D UGUI实现缩放循环拖动卡牌展示效果

using UnityEngine;using UnityEngine.EventSystems;using UnityEngine.UI; public enum DragPosition{ Left, Right, Up, Down,} [RequireComponent(typeof(Image))]public class CDragOnCard : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler{ public bool dragOnSurfaces = true; public ScrollRect m_ScrollRect = null; public CFixGridRect m_FixGridRect = null; private RectTransform m_DraggingPlane;  public bool isVertical = false; private bool isSelf = false; private DragPosition m_dragPosition = DragPosition.Left;  public System.Action<DragPosition> DragCallBack = null;  public void OnBeginDrag(PointerEventData eventData) {  Vector2 touchDeltaPosition = Vector2.zero;#if UNITY_EDITOR  float delta_x = Input.GetAxis("Mouse X");  float delta_y = Input.GetAxis("Mouse Y");  touchDeltaPosition = new Vector2(delta_x, delta_y); #elif UNITY_ANDROID || UNITY_IPHONE touchDeltaPosition = Input.GetTouch(0).deltaPosition; #endif  if (isVertical)  {   if(touchDeltaPosition.y > 0)   {    UnityEngine.Debug.Log("上拖");    m_dragPosition = DragPosition.Up;   }   else   {    UnityEngine.Debug.Log("下拖");    m_dragPosition = DragPosition.Down;   }    if (Mathf.Abs(touchDeltaPosition.x) > Mathf.Abs(touchDeltaPosition.y))   {    isSelf = true;    var canvas = FindInParents<Canvas>(gameObject);    if (canvas == null)     return;     if (dragOnSurfaces)     m_DraggingPlane = transform as RectTransform;    else     m_DraggingPlane = canvas.transform as RectTransform;    }   else   {    isSelf = false;    if (m_ScrollRect != null)     m_ScrollRect.OnBeginDrag(eventData);   }  }  else //水平  {   if (touchDeltaPosition.x > 0)   {    UnityEngine.Debug.Log("右移");    m_dragPosition = DragPosition.Right;   }   else   {    UnityEngine.Debug.Log("左移");    m_dragPosition = DragPosition.Left;   }    if (Mathf.Abs(touchDeltaPosition.x) < Mathf.Abs(touchDeltaPosition.y))   {    isSelf = true;    var canvas = FindInParents<Canvas>(gameObject);    if (canvas == null)     return;     if (dragOnSurfaces)     m_DraggingPlane = transform as RectTransform;    else     m_DraggingPlane = canvas.transform as RectTransform;   }   else   {    isSelf = false;    if (m_ScrollRect != null)     m_ScrollRect.OnBeginDrag(eventData);   }  } }  public void OnDrag(PointerEventData data) {  if (isSelf)  {   }  else  {   if (m_ScrollRect != null)    m_ScrollRect.OnDrag(data);  } }  public void OnEndDrag(PointerEventData eventData) {  if (isSelf)  {   }  else  {   if (m_ScrollRect != null)    m_ScrollRect.OnEndDrag(eventData);   if (m_FixGridRect != null)    m_FixGridRect.OnEndDrag(eventData);  }   if (DragCallBack != null)   DragCallBack(m_dragPosition); }  static public T FindInParents<T>(GameObject go) where T : Component {  if (go == null) return null;  var comp = go.GetComponent<T>();   if (comp != null)   return comp;   Transform t = go.transform.parent;  while (t != null && comp == null)  {   comp = t.gameObject.GetComponent<T>();   t = t.parent;  }  return comp; }}

using UnityEngine;using System.Collections;using UnityEngine.UI; public class EnhanceItem : MonoBehaviour{ // 在ScrollViewitem中的索引 // 定位当前的位置和缩放 public int scrollViewItemIndex = 0; public bool inRightArea = false;  private Vector3 targetPos = Vector3.one; private Vector3 targetScale = Vector3.one;  private Transform mTrs; private Image mImage;  private int index = 1; public void Init(int cardIndex = 1) {  index = cardIndex;  mTrs = this.transform;  mImage = this.GetComponent<Image>();  mImage.sprite = Resources.Load<Sprite>(string.Format("Texture/card_bg_big_{0}", cardIndex % 6 + 1));  this.gameObject.GetComponent<Button>().onClick.AddListener(delegate () { OnClickScrollViewItem(); }); }  // 当点击Item，将该item移动到中间位置 private void OnClickScrollViewItem() {  Debug.LogError("点击" + index);  EnhancelScrollView.GetInstance().SetHorizontalTargetItemIndex(scrollViewItemIndex); }  /// <summary> /// 更新该Item的缩放和位移 /// </summary> public void UpdateScrollViewItems(float xValue, float yValue, float scaleValue) {  targetPos.x = xValue;  targetPos.y = yValue;  targetScale.x = targetScale.y = scaleValue;   mTrs.localPosition = targetPos;  mTrs.localScale = targetScale; }  public void SetSelectColor(bool isCenter) {  if (mImage == null)   mImage = this.GetComponent<Image>();   if (isCenter)   mImage.color = Color.white;  else   mImage.color = Color.gray; }}

using UnityEngine;using System.Collections;using System.Collections.Generic;using UnityEngine.UI; public class EnhancelScrollView : MonoBehaviour{ public AnimationCurve scaleCurve; public AnimationCurve positionCurve; public float posCurveFactor = 500.0f; public float yPositionValue = 46.0f;  public List<EnhanceItem> scrollViewItems = new List<EnhanceItem>(); private List<Image> imageTargets = new List<Image>();  private EnhanceItem centerItem; private EnhanceItem preCenterItem;  private bool canChangeItem = true;  public float dFactor = 0.2f;  private float[] moveHorizontalValues; private float[] dHorizontalValues;  public float horizontalValue = 0.0f; public float horizontalTargetValue = 0.1f;  private float originHorizontalValue = 0.1f; public float duration = 0.2f; private float currentDuration = 0.0f;  private static EnhancelScrollView instance;  private bool isInit = false; public static EnhancelScrollView GetInstance() {  return instance; }  void Awake() {  instance = this; }  public void Init() {  if ((scrollViewItems.Count % 2) == 0)  {   Debug.LogError("item count is invaild,please set odd count! just support odd count.");  }   if (moveHorizontalValues == null)   moveHorizontalValues = new float[scrollViewItems.Count];   if (dHorizontalValues == null)   dHorizontalValues = new float[scrollViewItems.Count];   if (imageTargets == null)   imageTargets = new List<Image>();   int centerIndex = scrollViewItems.Count / 2;  for (int i = 0; i < scrollViewItems.Count; i++)  {   scrollViewItems[i].scrollViewItemIndex = i;   Image tempImage = scrollViewItems[i].gameObject.GetComponent<Image>();   imageTargets.Add(tempImage);    dHorizontalValues[i] = dFactor * (centerIndex - i);    dHorizontalValues[centerIndex] = 0.0f;   moveHorizontalValues[i] = 0.5f - dHorizontalValues[i];   scrollViewItems[i].SetSelectColor(false);  }   //centerItem = scrollViewItems[centerIndex];  canChangeItem = true;  isInit = true; }  public void UpdateEnhanceScrollView(float fValue) {  for (int i = 0; i < scrollViewItems.Count; i++)  {   EnhanceItem itemScript = scrollViewItems[i];   float xValue = GetXPosValue(fValue, dHorizontalValues[itemScript.scrollViewItemIndex]);   float scaleValue = GetScaleValue(fValue, dHorizontalValues[itemScript.scrollViewItemIndex]);   itemScript.UpdateScrollViewItems(xValue, yPositionValue, scaleValue);  } }  void Update() {  if (!isInit)   return;  currentDuration += Time.deltaTime;  SortDepth();  if (currentDuration > duration)  {   currentDuration = duration;    //if (centerItem != null)   //{   // centerItem.SetSelectColor(true);   //}    if (centerItem == null)   {    var obj = transform.GetChild(transform.childCount - 1);    if (obj != null)     centerItem = obj.GetComponent<EnhanceItem>();    if (centerItem != null)     centerItem.SetSelectColor(true);   }   else    centerItem.SetSelectColor(true);   if (preCenterItem != null)    preCenterItem.SetSelectColor(false);   canChangeItem = true;  }   float percent = currentDuration / duration;  horizontalValue = Mathf.Lerp(originHorizontalValue, horizontalTargetValue, percent);  UpdateEnhanceScrollView(horizontalValue); }  private float GetScaleValue(float sliderValue, float added) {  float scaleValue = scaleCurve.Evaluate(sliderValue + added);  return scaleValue; }  private float GetXPosValue(float sliderValue, float added) {  float evaluateValue = positionCurve.Evaluate(sliderValue + added) * posCurveFactor;  return evaluateValue; }  public void SortDepth() {  imageTargets.Sort(new CompareDepthMethod());  for (int i = 0; i < imageTargets.Count; i++)   imageTargets[i].transform.SetSiblingIndex(i); }  public class CompareDepthMethod : IComparer<Image> {  public int Compare(Image left, Image right)  {   if (left.transform.localScale.x > right.transform.localScale.x)    return 1;   else if (left.transform.localScale.x < right.transform.localScale.x)    return -1;   else    return 0;  } }  private int GetMoveCurveFactorCount(float targetXPos) {  int centerIndex = scrollViewItems.Count / 2;  for (int i = 0; i < scrollViewItems.Count; i++)  {   float factor = (0.5f - dFactor * (centerIndex - i));    float tempPosX = positionCurve.Evaluate(factor) * posCurveFactor;   if (Mathf.Abs(targetXPos - tempPosX) < 0.01f)    return Mathf.Abs(i - centerIndex);  }  return -1; }  public void SetHorizontalTargetItemIndex(int itemIndex) {  if (!canChangeItem)   return;   EnhanceItem item = scrollViewItems[itemIndex];  if (centerItem == item)   return;   canChangeItem = false;  preCenterItem = centerItem;  centerItem = item;   float centerXValue = positionCurve.Evaluate(0.5f) * posCurveFactor;  bool isRight = false;  if (item.transform.localPosition.x > centerXValue)   isRight = true;   int moveIndexCount = GetMoveCurveFactorCount(item.transform.localPosition.x);  if (moveIndexCount == -1)  {   moveIndexCount = 1;  }   float dvalue = 0.0f;  if (isRight)   dvalue = -dFactor * moveIndexCount;  else   dvalue = dFactor * moveIndexCount;   horizontalTargetValue += dvalue;  currentDuration = 0.0f;  originHorizontalValue = horizontalValue; }  public void OnBtnRightClick() {  if (!canChangeItem)   return;  int targetIndex = centerItem.scrollViewItemIndex + 1;  if (targetIndex > scrollViewItems.Count - 1)   targetIndex = 0;  SetHorizontalTargetItemIndex(targetIndex); }  public void OnBtnLeftClick() {  if (!canChangeItem)   return;  int targetIndex = centerItem.scrollViewItemIndex - 1;  if (targetIndex < 0)   targetIndex = scrollViewItems.Count - 1;  SetHorizontalTargetItemIndex(targetIndex); }}

public int totalItemNum;//共有几个单元格  public int currentIndex;//当前单元格的索引  private float bilv ;  public float currentBilv = 0;  private void Awake() {   scrollRect = GetComponent<ScrollRect>();   scrollRect.horizontalNormalizedPosition =0; } // Use this for initialization void Start () { Button[] button = scrollRect.content.GetComponentsInChildren<Button>(); totalItemNum= button.Length; bilv = 1 / (totalItemNum - 1.00f);  }  public void OnBeginDrag(PointerEventData eventData) {   beginMousePositionX = Input.mousePosition.x; }  public void OnEndDrag(PointerEventData eventData) {  float offSetX = 0;  endMousePositionX = Input.mousePosition.x;  offSetX = beginMousePositionX - endMousePositionX;  if (Mathf.Abs(offSetX)>firstItemLength) {  if (offSetX>0)  {   //当前的单元格大于等于单元格的总个数  if (currentIndex >= totalItemNum-1 )  {    Debug.Log("左滑动-------");   return;  }   currentIndex += 1;   scrollRect.DOHorizontalNormalizedPos(currentBilv += bilv, 0.2f);   Debug.Log("左滑动");  }  else  {  Debug.Log("右滑动");   //当前的单元格大于等于单元格的总个数  if ( currentIndex < 1)  {    return;  }  currentIndex -= 1;   scrollRect.DOHorizontalNormalizedPos(currentBilv -= bilv, 0.2f);   } }  }

using System.Collections;using System.Collections.Generic;using UnityEngine;using DG.Tweening;using UnityEngine.UI; public class ThreePage1 : MonoBehaviour {  public GameObject[] images;  int currentIndex; public float DistancesNum = 250; public float min = 0.8f; public float max = 1.4f;  public float speed = 0.2f; public float Alpha = 0.8f;   void Start () { InitRectTranform(); } public void InitRectTranform() { currentIndex = images.Length / 2; for (int i = currentIndex + 1; i < images.Length; i++) {  images[i].GetComponent<RectTransform>().anchoredPosition = new Vector3((i - currentIndex) * DistancesNum, 0, 0); } int num = 0; for (int i = currentIndex; i >= 0; i--) {  images[i].GetComponent<RectTransform>().anchoredPosition = new Vector3(-num * DistancesNum, 0, 0);  num++; } foreach (var item in images) {  if (item != images[currentIndex])  {  item.GetComponent<RectTransform>().localScale = new Vector3(min, min);  item.GetComponent<Image>().color = new Color(1, 1, 1, Alpha);  }  else  {  item.GetComponent<RectTransform>().localScale = new Vector3(max, max);  } } } public void Left() {  ButtonManager._Instances.PlayInput();  OnLeftButtonClick(); }  public void OnLeftButtonClick() {  if (currentIndex < images.Length-1) {   foreach (GameObject item in images)  {  (item.GetComponent<RectTransform>()).DOAnchorPosX(item.GetComponent<RectTransform>().anchoredPosition.x- DistancesNum, speed);   }  images[currentIndex].GetComponent<Image>().color = new Color(1, 1, 1, Alpha);  images[currentIndex].GetComponent<RectTransform>().DOScale(min, speed);  currentIndex += 1;  images[currentIndex].GetComponent<RectTransform>().DOScale(max, speed);  images[currentIndex].GetComponent<Image>().color = new Color(1, 1, 1, 1f); } }  public void Right() {   ButtonManager._Instances.PlayInput();  OnRightButtonClick(); }  public void OnRightButtonClick() {   if (currentIndex > 0) {  foreach (GameObject item in images)  {  (item.GetComponent<RectTransform>()).DOAnchorPosX(item.GetComponent<RectTransform>().anchoredPosition.x + DistancesNum, speed);   }  images[currentIndex].GetComponent<RectTransform>().DOScale(min, speed);  images[currentIndex].GetComponent<Image>().color = new Color(1, 1, 1, Alpha);  currentIndex -= 1;  images[currentIndex].GetComponent<RectTransform>().DOScale(max, speed);  images[currentIndex].GetComponent<Image>().color = new Color(1, 1, 1, 1f); } }  private void OnEnable() { isOn = true; timess = 0; //jarodInputController.IsShiYong = true;  }  private void OnDisable() { InitRectTranform(); jarodInputController.IsShiYong = false; }}