Unity3d 跑马灯

从右向左滚动的跑马灯：

using System;
using DG.Tweening;
using TMPro;
using UnityEngine;

namespace Ricimi.TimeLimit
{
    
    
    /// <summary>
    /// 跑马灯。
    /// </summary>
    public class UITimeLimit_Marquee : MonoBehaviour
    {
    
    
        [Header("滚动速度"), SerializeField]
        private float scrollDuration = 20f;
        
        [SerializeField]
        private Ease scrollEase = Ease.Linear;
        [SerializeField]
        private TextMeshProUGUI _scrollingText;
        [SerializeField]
        private RectTransform _scrollRectTransform;

        private Tweener _tweener;
        private int flag = -1;
        
        private void OnEnable()
        {
    
    
            StartScroll();
        }

        private void OnDisable()
        {
    
    
            _tweener ?.Kill();
        }

        private void StartScroll()
        {
    
    
            _tweener ?.Kill();

            float contentWidth = _scrollRectTransform.rect.width;
            
            _scrollRectTransform.DOKill();
            
            if (flag == -1)
            {
    
    
                _scrollRectTransform.anchoredPosition = new Vector2(contentWidth + 10, 0f);
                _scrollRectTransform.DOAnchorPosX(0, scrollDuration)
                    .SetEase(scrollEase)
                    .OnComplete(() => {
    
    
                        flag = 0;
                        DelayStartScroll();
                    });    
            }
            else if (flag == 0)
            {
    
    
                _scrollRectTransform.anchoredPosition = new Vector2(0, 0f);
                _scrollRectTransform.DOAnchorPosX(-contentWidth, scrollDuration)
                    .SetEase(scrollEase)
                    .OnComplete(() => {
    
    
                        flag = 0;
                        DelayStartScroll();
                    });    
            }
        }

        private void DelayStartScroll()
        {
    
    
            Invoke(nameof(StartScroll), 3);
        }

        public void SetText(string text)
        {
    
    
            _scrollingText.text = text;
        }
    }
}