脚本

using UnityEngine;

using System.Collections;

using UnityEngine.UI;

public class TypewriterEffect : MonoBehaviour {

    public float charsPerSecond = 0.2f;//打字时间间隔

    private string words;//保存需要显示的文字

    private bool isActive = false;

    private float timer;//计时器

    private Text myText;

    private int currentPos=0;

    void Start () {

        timer = 0;

        isActive = true;

        charsPerSecond = Mathf.Max (0.2f,charsPerSecond);

        myText = GetComponent<Text> ();

        words = myText.text;

        myText.text = "";//获取Text的文本信息，保存到words中，然后动态更新文本显示内容，实现打字机的效果

    }

    void Update () {

        OnStartWriter ();

        }

    public void StartEffect(){

        isActive = true;

    }

    /// <summary>

    /// 执行打字任务

    /// </summary>

    void OnStartWriter(){

        if(isActive){

            timer += Time.deltaTime;

            if(timer>=charsPerSecond){//判断计时器时间是否到达

                timer = 0;

                currentPos++;

                myText.text = words.Substring (0,currentPos);//刷新文本显示内容

                if(currentPos>=words.Length) {

                    OnFinish();

                }

            }

        }

    }

    /// <summary>

    /// 结束打字，初始化数据

    /// </summary>

    void OnFinish(){

        isActive = false;

        timer = 0;

        currentPos = 0;

        myText.text = words;

    }

}