UnityUI炸出金币再收集的特效

完成的效果，在指定位置生成一定数量的货币ICON，然后扩散出去。等待一定时间后，汇集到指定位置。

代码：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class UICurrencyCollect : MonoBehaviour
{
  
  [Header("[Count Param]")]
  public int maxIcon; //最大Icon数量
  public int minIcon; //最少Icon数量
  public int maxCurrency; //到达最大Icon数量时候的数量
  [Header("[Boomb Param]")]
  public float range; //炸出范围
  public float timeToBoom;  //飞出时间
  public float timeToStop;  //飞出后停滞的时间
  public float timeToCollect; //飞去固定位置的时间
  [Header("[UnityObj]")]

  public Image prefab; //复制的预设

  //--------------- status --------------
  public bool isPlaying { get { return ani != null; } }
  public Sprite sprite
  {
    get { return prefab.sprite; }
    set { prefab.sprite = value; }
  }
  public Vector3 startPos
  {
    get { return _startPos; }
    set { this._startPos = value; }
  }
  //--------------- private -------------
  Coroutine ani;
  Transform parentOfCurrency;
  Vector3 _startPos;


  private void Start()
  {
    _startPos = this.transform.position;
    prefab.gameObject.SetActive(false);
  }
  //--------------- function ------------
  public void BoombToCollectCurrency(int count, Vector3 to)
  {
    if (isPlaying) return;
    CreateParent();
    int coinCount = count / maxCurrency * maxIcon;
    coinCount = Mathf.Clamp(coinCount, minIcon, maxIcon);
    ani = StartCoroutine(_BoombToCollectCurrency(coinCount, to));
  }

  public void StopAni()
  {
    if (!isPlaying) return;
    StopAllCoroutines();
    ani = null;
    DestroyImmediate(parentOfCurrency.gameObject);
  }

  //----------- boomb ani -----------------

  IEnumerator _BoombToCollectCurrency(int count, Vector3 to)
  {
    List currencyObj = new List();
    for (int i = 0; i < count; i++)
    {
      currencyObj.Add(CreateCurrencyObj());
    }
    yield return StartCoroutine(ExporeOut(currencyObj));
    yield return new WaitForSeconds(timeToStop);
    yield return StartCoroutine(FlyToPos(currencyObj, to));
    Destroy(parentOfCurrency.gameObject);
    ani = null;
  }

  IEnumerator ExporeOut(List currencyObj)
  {
    List toPos = new List();
    List fromPos = new List();
    foreach (Transform obj in currencyObj)
    {
      Vector3 pos = Random.insideUnitCircle;
      pos = pos * range + obj.transform.position;
      toPos.Add(pos);
      fromPos.Add(obj.transform.position);
    }
    float timer = 0;
    while (timer < timeToBoom)
    {
      timer += Time.deltaTime;
      for (int i = 0; i < currencyObj.Count; i++)
      {
        Vector3 from = fromPos[i];
        Vector3 to = toPos[i];
        Transform obj = currencyObj[i];
        Vector3 pos = Vector3.Lerp(currencyObj[i].transform.position, to, timer / timeToBoom);
        obj.transform.position = pos;
      }
      yield return null;
    }
  }
  IEnumerator FlyToPos(List currencyObj, Vector3 to)
  {
    Vector3 toPos = to;
    List fromPos = new List();
    foreach (Transform obj in currencyObj)
      fromPos.Add(obj.transform.position);
    float timer = 0;
    while (timer < timeToCollect)
    {
      timer += Time.deltaTime;
      for (int i = 0; i < currencyObj.Count; i++)
      {
        Vector3 from = fromPos[i];
        Transform obj = currencyObj[i];
        Vector3 pos = Vector3.Lerp(from, to, timer / timeToCollect);
        obj.transform.position = pos;
      }
      yield return null;
    }
  }



  Transform CreateCurrencyObj()
  {
    GameObject obj = GameObject.Instantiate(prefab.gameObject);
    obj.SetActive(true);
    obj.transform.SetParent(parentOfCurrency);
    //obj.GetComponent().sprite = sprite;
    obj.transform.position = parentOfCurrency.transform.position;
    return obj.transform;
  }

  void CreateParent()
  {
    GameObject obj = new GameObject("parentOfCurrency");
    parentOfCurrency = obj.transform;
    parentOfCurrency.SetParent(this.transform);
    parentOfCurrency.position = startPos;

  }

}