Unity UGUI打字机效果

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

[RequireComponent(typeof(Text))]
public class TextTyper : MonoBehaviour
{
    public enum SplitMethod
    {
        BySpace,
        ByChar
    }
    public SplitMethod spliteMethod;
    public string content;
    public float deltaTime;
    public bool AutoPlay;

    bool isPlay = false;
    Text text;
    float tmpTime = 0;

    List<string> contentGroup;
    private void Start()
    {
        text = GetComponent<Text>();
        switch (spliteMethod)
        {
            case SplitMethod.ByChar:
                contentGroup = new List<string>();
                for (int i = 0; i < content.Length; i++)
                {
                    contentGroup.Add(content.Substring(i, 1));
                }
                break;
            case SplitMethod.BySpace:
                contentGroup = content.Split(' ').ToList();
                break;
        }
        if (AutoPlay)
            Play();
    }
    public void Play()
    {
        isPlay = true;
        index = 0;
        tmpTime = 0;
    }
    private int index;
    void Update()
    {
        if (isPlay)
        {
            if (index >= contentGroup.Count)
            {
                isPlay = false;
            }
            if ((tmpTime += Time.deltaTime) >= deltaTime)
            {
                tmpTime = 0;
                text.text += contentGroup[index++] + ((spliteMethod == SplitMethod.BySpace)?" ":"");
                
            }
        }
    }
}

*文字过长会导致突然自动换行，用空格填充即可。