Unity实现老虎机滚动抽奖效果的示例代码

using System.Collections;
using UnityEngine;
using UnityEngine.UI;

public class ScollToDraw : MonoBehaviour
{
      // 抽奖按钮
      public Button DrowBtn;
      
      // 奖励图片
      public Image[] ArardImgArr;

      // 转盘速度
      public float AniMoveSpeed = 3f;

      // 进度
      private float[] progress = new[] {0f, 1f, 2f, 3f, 4f};

      // 转动动画位置
      private Vector3[] AniPosV3 = new[]
            {Vector3.up * 240, Vector3.up * 120, Vector3.zero, Vector3.down * 120, Vector3.down * 240};

      // 自动暂停标识
      private bool isAutoStop;
      // 抽奖结束 停止刷新界面UI
      private bool isStopUpdatePos;
      
      void Start()
      {
            DrowBtn.onClick.AddListener(DrawFun);
            isAutoStop = false;
            isStopUpdatePos = false;
      }

      void Update()
      {
            if (isStopUpdatePos) return;
            
            float t = Time.deltaTime * AniMoveSpeed;
            for (int i = 0; i < ArardImgArr.Length; i++)
            {
                  progress[i] += t;
                  ArardImgArr[i].transfORM.localPosition = MovePosition(i);
            }
      }
      
      // 获取下一个移动到的位置
      Vector3 MovePosition(int i)
      {
            int index = Mathf.FloorToInt(progress[i]);
            if (index > AniPosV3.Length - 2)
            {
                  //保留其小数部分，不能直接赋值为0
                  progress[i] -= index; 
                  index = 0;
                  // 索引为2的到底了，索引为0的就在正中心
                  if (i == 2 && isAutoStop)
                  {
                        isStopUpdatePos = true;
                        Debug.Log("展示奖励界面...");
                        // todo...获取奖励数据维护
                  }
                  return AniPosV3[index];
            }
            else
            {
                  return Vector3.Lerp(AniPosV3[index], AniPosV3[index + 1], progress[i] - index);
            }
      }
      
      /// <summary>
      /// 点击抽奖
      /// </summary>
      void DrawFun()
      {
            isAutoStop = false;
            isStopUpdatePos = false;
            StartCoroutine(SetMoveSpeed(2));
            // DoTween 按钮下拉动画
            // Transform tran = DrowBtn.transform;
            //tran.DOLocalMoveY(-60, 0.2f).OnComplete(() =>
            //{
            //      tran.DOLocalMoveY(50, 0.2f);
            //
            //});
      }
      
      // 抽奖动画速度控制
      IEnumerator SetMoveSpeed(int time)
      {
            AniMoveSpeed = 10;
            yield return new WaitForSeconds(time);
            AniMoveSpeed = 1;
            yield return new WaitForSeconds(time);
            isAutoStop = true;
      }
}