本文實例為大家分享了Unity實現(xiàn)卡牌翻動效果展示的具體代碼，供大家參考，具體內(nèi)容如下

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事實上這是項目需要，我改的一個代碼，實際上就是利用unity的一些基礎(chǔ)屬性實現(xiàn)其效果。啥也不多說了，先上原代碼：

/// Credit Mrs. YakaYocha 
/// Sourced from - https://www.youtube.com/channel/UCHp8LZ_0-iCvl-5pjHATsgw
/// Please donate: https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=RJ8D9FRFQF9VS
 
using UnityEngine.Events;
 
namespace UnityEngine.UI.Extensions
{
 [RequireComponent(typeof(ScrollRect))]
 [AddComponentMenu("Layout/Extensions/Vertical Scroller")]
 public class UIVerticalScroller : MonoBehaviour
 {
  [Tooltip("Scrollable area (content of desired ScrollRect)")]
  public RectTransform _scrollingPanel;
  [Tooltip("Elements to populate inside the scroller")]
  public GameObject[] _arrayOfElements;
  [Tooltip("Center display area (position of zoomed content)")]
  public RectTransform _center;
  [Tooltip("Select the item to be in center on start. (optional)")]
  public int StartingIndex = -1;
  [Tooltip("Button to go to the next page. (optional)")]
  public GameObject ScrollUpButton;
  [Tooltip("Button to go to the previous page. (optional)")]
  public GameObject ScrollDownButton;
  [Tooltip("Event fired when a specific item is clicked, exposes index number of item. (optional)")]
  public UnityEvent<int> ButtonClicked;
 
 
  private float[] distReposition;
  private float[] distance;
  //private int elementsDistance;
  private int minElementsNum;
  private int elementLength;
  //private int elementHalfLength;
  private float deltaY;
  private string result;
 
  public UIVerticalScroller() { }
 
  public UIVerticalScroller(RectTransform scrollingPanel, GameObject[] arrayOfElements, RectTransform center)
  {
   _scrollingPanel = scrollingPanel;
   _arrayOfElements = arrayOfElements;
   _center = center;
  }
 
 
  public void Awake()
  {
   var scrollRect = GetComponent<ScrollRect>();
   if (!_scrollingPanel)
   {
    _scrollingPanel = scrollRect.content;
   }
   if (!_center)
   {
    Debug.LogError("Please define the RectTransform for the Center viewport of the scrollable area");
   }
   if (_arrayOfElements == null || _arrayOfElements.Length == 0)
   {
    var childCount = scrollRect.content.childCount;
    if (childCount > 0)
    {
     _arrayOfElements = new GameObject[childCount];
     for (int i = 0; i < childCount; i++)
     {
      _arrayOfElements[i] = scrollRect.content.GetChild(i).gameObject;
     }     
    }
   }
  }
 
  public void Start()
  {
   if (_arrayOfElements.Length < 1)
   {
    Debug.Log("No child content found, exiting..");
    return;
   }
 
   elementLength = _arrayOfElements.Length;
   distance = new float[elementLength];
   distReposition = new float[elementLength];
 
   //get distance between buttons
   //elementsDistance = (int)Mathf.Abs(_arrayOfElements[1].GetComponent<RectTransform>().anchoredPosition.y - _arrayOfElements[0].GetComponent<RectTransform>().anchoredPosition.y);
   deltaY = _arrayOfElements[0].GetComponent<RectTransform>().rect.height * elementLength / 3 * 2;
   Vector2 startPosition = new Vector2(_scrollingPanel.anchoredPosition.x, -deltaY);
   _scrollingPanel.anchoredPosition = startPosition;
 
   for (var i = 0; i < _arrayOfElements.Length; i++)
   {
    AddListener(_arrayOfElements[i], i);
   }
 
   if (ScrollUpButton)
    ScrollUpButton.GetComponent<Button>().onClick.AddListener(() => { ScrollUp(); });
 
   if (ScrollDownButton)
    ScrollDownButton.GetComponent<Button>().onClick.AddListener(() => { ScrollDown(); });
 
   if (StartingIndex > -1)
   {
    StartingIndex = StartingIndex > _arrayOfElements.Length ? _arrayOfElements.Length - 1 : StartingIndex;
    SnapToElement(StartingIndex);
   }
  }
 
  private void AddListener(GameObject button, int index)
  {
   button.GetComponent<Button>().onClick.AddListener(() => DoSomething(index));
  }
 
  private void DoSomething(int index)
  {
   if (ButtonClicked != null)
   {
    ButtonClicked.Invoke(index);
   }
  }
 
  public void Update()
  {
   if (_arrayOfElements.Length < 1)
   {
    return;
   }
 
   for (var i = 0; i < elementLength; i++)
   {
    distReposition[i] = _center.GetComponent<RectTransform>().position.y - _arrayOfElements[i].GetComponent<RectTransform>().position.y;
    distance[i] = Mathf.Abs(distReposition[i]);
 
    //Magnifying effect
    float scale = Mathf.Max(0.7f, 1 / (1 + distance[i] / 200));
    _arrayOfElements[i].GetComponent<RectTransform>().transform.localScale = new Vector3(scale, scale, 1f);
   }
   float minDistance = Mathf.Min(distance);
 
   for (var i = 0; i < elementLength; i++)
   {
    _arrayOfElements[i].GetComponent<CanvasGroup>().interactable = false;
    if (minDistance == distance[i])
    {
     minElementsNum = i;
     _arrayOfElements[i].GetComponent<CanvasGroup>().interactable = true;
     result = _arrayOfElements[i].GetComponentInChildren<Text>().text;
    }
   }
 
   ScrollingElements(-_arrayOfElements[minElementsNum].GetComponent<RectTransform>().anchoredPosition.y);
  }
 
  private void ScrollingElements(float position)
  {
   float newY = Mathf.Lerp(_scrollingPanel.anchoredPosition.y, position, Time.deltaTime * 1f);
   Vector2 newPosition = new Vector2(_scrollingPanel.anchoredPosition.x, newY);
   _scrollingPanel.anchoredPosition = newPosition;
  }
 
  public string GetResults()
  {
   return result;
  }
 
  public void SnapToElement(int element)
  {
   float deltaElementPositionY = _arrayOfElements[0].GetComponent<RectTransform>().rect.height * element;
   Vector2 newPosition = new Vector2(_scrollingPanel.anchoredPosition.x, -deltaElementPositionY);
   _scrollingPanel.anchoredPosition = newPosition;
 
  }
 
  public void ScrollUp()
  {
   float deltaUp = _arrayOfElements[0].GetComponent<RectTransform>().rect.height / 1.2f;
   Vector2 newPositionUp = new Vector2(_scrollingPanel.anchoredPosition.x, _scrollingPanel.anchoredPosition.y - deltaUp);
   _scrollingPanel.anchoredPosition = Vector2.Lerp(_scrollingPanel.anchoredPosition, newPositionUp, 1);
  }
 
  public void ScrollDown()
  {
   float deltaDown = _arrayOfElements[0].GetComponent<RectTransform>().rect.height / 1.2f;
   Vector2 newPositionDown = new Vector2(_scrollingPanel.anchoredPosition.x, _scrollingPanel.anchoredPosition.y + deltaDown);
   _scrollingPanel.anchoredPosition = newPositionDown;
  }
 }
}

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網(wǎng)頁題目：Unity實現(xiàn)卡牌翻動效果-創(chuàng)新互聯(lián)
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