Unity滚动字幕—信件展示为例

思路

1. 利用协程，逐句滚动
2. 在每局中再利用协程，逐字滚动

代码

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

public class LetterControl : MonoBehaviour
{
    [TextArea(1, 5)] public string[] letters;//信件内容
    public Text letterText;//信件展示区域

    public float letterSpeed;//每行滚动速度
    public float alphaSpeed;//字符滚动速度

    [SerializeField]private bool isLineFinished = true;//当前行是否展示完成，最开始为true
    [SerializeField] private int currentLine = 0;//当前展示的行数

    
    // Start is called before the first frame update
    void Start()
    {
        isLineFinished = true;
        letterText.text = "旅行者:"+"\n";//初始化

        StartCoroutine(ScrollingLetter());//开始展示
        
    }

    // Update is called once per frame
    void Update()
    {
        
    }

    private IEnumerator ScrollingLetter()
    {
        while(true)
        {
            //如果信件展示完了，加上落款并退出
            if(currentLine==letters.Length && isLineFinished)
            {
                letterText.text += "\n";
                letterText.text += "温迪";
                break;
            }
            else//否则就展示
            {
                //如果当前行展示完成，启动协程函数展示下一行
                if(isLineFinished)
                {
                    isLineFinished = false;//isLineFinished设置成false
                    StartCoroutine(ScrollingLine(letters[currentLine++]));//传入字符串
                }

                yield return new WaitForSeconds(letterSpeed);//回调
            }
        }
    }

    private IEnumerator ScrollingLine(string line)
    {
        letterText.text += "\u00A0\u00A0\u00A0\u00A0";//段首空两格

        //逐字输出
        foreach (char alpha in line.ToCharArray())
        {
            letterText.text += alpha;
            yield return new WaitForSeconds(alphaSpeed);
        }

        letterText.text += "\n";//换行
        isLineFinished = true;//当前行输出完成后，isLineFinished设置成true
    }
}

参数设置

效果