Unity UGUI Text组件首行不出现标点符号

本文转载自:https://blog.csdn.net/dengshunhao/article/details/86659401

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

public class TextFit : Text
{
    /// 
    /// 用于匹配标点符号(正则表达式)
    /// 
    private readonly string strRegex = @"\p{P}";

    /// 
    /// 用于存储text组件中的内容
    /// 
    private System.Text.StringBuilder MExplainText = null;

    /// 
    /// 用于存储text生成器中的内容
    /// 
    private IList<UILineInfo> MExpalinTextLine;
    protected override void OnPopulateMesh(VertexHelper toFill)
    {
        base.OnPopulateMesh(toFill);
        StartCoroutine(MClearUpExplainMode(this, text));
    }
    /// 
    /// 整理文字。确保首字母不出现标点
    /// 
    /// text组件
    /// 需要填入text中的内容
    /// 
    IEnumerator MClearUpExplainMode(Text _component, string _text)
    {
        _component.text = _text;

        //如果直接执行下边方法的话,那么_component.cachedTextGenerator.lines将会获取的是之前text中的内容,而不是_text的内容,所以需要等待一下
        yield return new WaitForSeconds(0.001f);


        MExpalinTextLine = _component.cachedTextGenerator.lines;

        //需要改变的字符序号
        int mChangeIndex = -1;

        MExplainText = new System.Text.StringBuilder(_component.text);

        for (int i = 1; i < MExpalinTextLine.Count; i++)
        {
            try
            {
                //首位是否有标点
                bool _b = Regex.IsMatch(_component.text[MExpalinTextLine[i].startCharIdx].ToString(), strRegex);

                if (_b)
                {

                    mChangeIndex = MExpalinTextLine[i].startCharIdx - 1;

                    MExplainText.Insert(mChangeIndex, "\n");
                }
            }
            catch (System.Exception e)
            {
                Debug.Log(e.Message);
            }
        }

        _component.text = MExplainText.ToString();
    }
}

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