在有文字提示的時(shí)候，想要實(shí)現(xiàn)一個(gè)字一個(gè)字的往外面提示，

下面來介紹一下實(shí)現(xiàn)方式

面板中

方法一 使用計(jì)時(shí)器

TypewriterEffect .cs腳本

using UnityEngine;
using UnityEngine.UI;

public class TypewriterEffect : MonoBehaviour
{
    public float charsPerSecond = 0.2f;//打字時(shí)間間隔
    private string words;//保存需要顯示的文字

    private bool isActive = false;
    private float timer;//計(jì)時(shí)器
    private Text myText;
    private int currentPos = 0;//當(dāng)前打字位置

    // Use this for initialization
    void Start()
    {
        timer = 0;
        isActive = true;
        charsPerSecond = Mathf.Max(0.2f, charsPerSecond);
        myText = GetComponent<Text>();
        words = myText.text;
        myText.text = "";//獲取Text的文本信息，保存到words中，然后動(dòng)態(tài)更新文本顯示內(nèi)容，實(shí)現(xiàn)打字機(jī)的效果
    }

    // Update is called once per frame
    void Update()
    {
        OnStartWriter();
        //Debug.Log (isActive);
    }
    //public void StartEffect()
    //{
    //  isActive = true;
    //}
    /// <summary>
    /// 執(zhí)行打字任務(wù)
    /// </summary>
    void OnStartWriter()
    {

        if (isActive)
        {
            timer += Time.deltaTime;
            if (timer >= charsPerSecond)
            {//判斷計(jì)時(shí)器時(shí)間是否到達(dá)
                timer = 0;
                currentPos++;
                myText.text = words.Substring(0, currentPos);//刷新文本顯示內(nèi)容

                if (currentPos >= words.Length)
                {
                    OnFinish();
                }
            }

        }
    }
    /// <summary>
    /// 結(jié)束打字，初始化數(shù)據(jù)
    /// </summary>
    void OnFinish()
    {
        isActive = false;
        timer = 0;
        currentPos = 0;
        myText.text = words;
    }
}

方法二 使用DoTween插件

using DG.Tweening;
using UnityEngine;
using UnityEngine.UI;

public class DoTxt : MonoBehaviour
{
    public Text TxtTips;//text組件
    public string str;//文字
    public float time;//顯示時(shí)間
    //想要首航縮進(jìn)的話，空格不好用
    //①?gòu)?fù)制　　這是兩個(gè)空白的字符，需要的自行復(fù)制 

    //②在腳本中直接賦值text是最簡(jiǎn)單的 
    //TextTest.text =“\u3000\u3000”+"字符串";

    //2.UGUI的Text如果在編輯器直接輸入顯示我們可以自定義某幾個(gè)字符串的alpha值
    //  <color=#FFFFFF00>-----</color>
    void Start()
    {
        TxtTips.DOText(str,time).SetEase(Ease.Linear);//勻速顯示當(dāng)前文章
    }
}
```
### 方法三
```
private float letterPause = 0.2f;//等待時(shí)間
    private string str;

    public Text TxtTips;
    public Text TxtTitle;

private IEnumerator TypeText(string text, Text txt)
    {
        _Introduce.clip = BgClips;//打字聲音
        str = "";
        foreach (char letter in text.ToCharArray())
        {
            str += letter;
            //if (BgClips && !_Introduce.isPlaying)
            //{
            //  _Introduce.Play ();
            //}
            yield return new WaitForSeconds(letterPause);
            txt.text = str + "|";
            _Introduce.Stop();//打字聲音暫停
        }
        txt.text = text;
    }
```