Unity Text超框 文字滚动循环显示

Unity Text超框 文字滚动循环显示

//container Text

using System.Collections;
using System.Collections.Generic;
using Unity.VisualScripting;
using UnityEngine;
using UnityEngine.UI;

public class AutoScrollText : MonoBehaviour
{

    private Text[] _texts = new Text[2];
    private RectTransform _container;
    private RectTransform _mask;



    [SerializeField] private string _txt; //显示文本
    [SerializeField] private float _speed = 30f; //滚动速度
    [SerializeField] private float _space; //间距

    [SerializeField] private float _overall; //字体长度
    [SerializeField] private float _overall2; //总长度
    [SerializeField] private float _leftBound = 0;// 左边界
    [SerializeField] private bool _scroll = false; //是否滚动
    private float _startTime;//开始滚动时间



    private void Awake()
    {
        _mask = this.GetComponent<RectTransform>();
        _container = transform.GetChild(0).GetComponent<RectTransform>();

        _texts[0] = _container.GetChild(0).GetComponent<Text>();
        _texts[1] = _container.GetChild(1).GetComponent<Text>();

        _container.pivot = new Vector2(0, 0.5f);
        _texts[0].rectTransform.pivot = new Vector2(0, 0.5f);
        _texts[1].rectTransform.pivot = new Vector2(0, 0.5f);
        var size = _texts[0].gameObject.GetOrAddComponent<ContentSizeFitter>();
        size.horizontalFit = ContentSizeFitter.FitMode.PreferredSize;

        size = _texts[1].gameObject.GetOrAddComponent<ContentSizeFitter>();
        size.horizontalFit = ContentSizeFitter.FitMode.PreferredSize;

    }

    private void Start()
    {
        //SetText(_txt,false);
    }

    private void FixedUpdate()
    {
        if (_scroll && Time.time > _startTime)
        {
            if (_container.localPosition.x < -10000000)
            {
                ResetContainer();
            }

            // 容器 移动
            _container.localPosition += Vector3.left * Time.fixedDeltaTime * _speed;

            //文本 位置 更新
            for (int i = 0; i < _texts.Length; ++i)
            {
                if (_texts[i].rectTransform.localPosition.x + _container.localPosition.x < _leftBound)
                {
                    SetToNextViewPos(i);
                }
            }
        }
    }


    public void StopScroll()//停止 滚动
    {
        ResetContainer(true);
    }

    public void StartScroll() //开始 滚动
    {
        ResetContainer();
    }

    public void SetText(string _txt, bool IsStopScroll = true)
    {
        this._txt = _txt;
        _texts[0].text = _txt;
        _texts[1].text = _txt;

        ResetContainer(IsStopScroll);
    }

    private void ResetContainer(bool IsStopScroll = false)//重置
    {
        _startTime = Time.time + 0.5f;
        _container.localPosition = new Vector2(_mask.rect.xMin + 5f, _container.localPosition.y);
        _texts[0].rectTransform.localPosition = new Vector2(0, _texts[0].rectTransform.localPosition.y);

        LayoutRebuilder.ForceRebuildLayoutImmediate(_texts[0].rectTransform);

        if (!IsStopScroll && _texts[0].rectTransform.rect.width > _mask.rect.width)
        {
            var relative = new Vector2(-_texts[0].rectTransform.rect.width + _mask.rect.min.x, _mask.rect.min.y);
            _leftBound = relative.x;
            _overall = _space + _texts[0].rectTransform.rect.width;
            _overall2 = _overall * 2;
            _texts[1].rectTransform.localPosition = _texts[0].rectTransform.localPosition + Vector3.right * _overall;
            _scroll = true;
            _texts[1].gameObject.SetActive(true);
        }
        else
        {
            _texts[1].gameObject.SetActive(false);
            _scroll = false;
        }
    }

    private void SetToNextViewPos(int index)//文本位置 交替
    {
        var count = Mathf.FloorToInt(-_container.localPosition.x / _overall2);
        var len = (-_container.localPosition.x) % _overall2;
        var x = len > _overall ? _overall2 * (count + 1) : _overall2 * count;
        x += index * _overall;

        _texts[index].rectTransform.localPosition = new Vector2(x, _texts[index].rectTransform.localPosition.y);
    }
}