UI随机出现金币dotween

        ```
    int rans = UnityEngine.Random.Range(0, 5);
    if (rans == 0) return;

    for (int i = 0; i < rans; i++)
    {
        GameObject go = Instantiate(coinObj, coinObj.transform.parent);
        

        go.transform.localPosition = Utils.WorldToUGUIPosition(enemyPos);
        go.SetActive(true);
        int vx = UnityEngine.Random.Range(0, 2);
        int vy = UnityEngine.Random.Range(0, 2);
        List<int> vxy = new List<int>() { -1, 1 };
        Vector3[] path = new Vector3[3];
        path[0] = go.transform.position;
        path[1] = go.transform.position - new Vector3(vxy[vx], vxy[vy], 0);
        path[2] = coinTarget.transform.position;

        Sequence sequence = DOTween.Sequence();
        sequence.Append(go.transform.DOScale(390.0f, 0.5f));
        sequence.Append(go.transform.DOScale(300.0f, 0.5f));

        go.transform.DORotate(new Vector3(0, 180, 0), 0.5f).SetLoops(-1);
        var tweenPath = go.transform.DOPath(path, 1f, PathType.CatmullRom);
        tweenPath.onComplete = () =>
        {
            if (!isScaleCoin)
            {
                isScaleCoin = true;
                Sequence coinSeq = DOTween.Sequence();
                coinSeq.Append(coinTarget.transform.DOScale(1.5f, 0.1f));
                coinSeq.Append(coinTarget.transform.DOScale(1f, 0.1f));
                coinSeq.AppendCallback(() =>
                {
                    isScaleCoin = false;
                });

            }

            Destroy(go);
            SoundManager.Instance.Play(Enums.SoundId.SoundCoin);
            DynamicData.Instance.coin++;
            OnRefresh();
        };
        tweenPath.SetEase(Ease.InOutSine);
    }

世界坐标转换
```public static Vector3 WorldToUGUIPosition(Vector3 pos) {
        Vector3 viewPos = Camera.main.WorldToViewportPoint(pos);
        return new Vector3((viewPos.x-0.5f)*UIMgr.Instance.width, (viewPos.y-0.5f)*UIMgr.Instance.height, 0);
    }