功能简介：
1、同一个Text内可以实现多个不同字符区域的点击；
2、适配了中文、英文、韩文、日文、阿拉伯语等，更多语种待测试；
C#脚本：
/******************************************************************
** 文件名: UIText_Link.cs
** 版 权: (C)
** 创建人: Summer
** 日 期: 2022/3/2
** 描 述: 超链接文本
*
"<a i=id>%s</a>"
*******************************************************************/
using System;
using UnityEngine;
using System.Text;
using UnityEngine.UI;
using System.Collections;
using UnityEngine.EventSystems;
using System.Collections.Generic;
using System.Text.RegularExpressions;
public class Text_Link : Text, IPointerClickHandler
{
protected override void Awake()
{
Set_TextLinkFuncCB((string i) =>
{
Debug.Log($"点击了：{
i}");
});
}
/// <summary>
/// 解析完最终的文本
/// </summary>
private string m_OutputText;
/// <summary>
/// 超链接信息列表
/// </summary>
private readonly List<HrefInfo_> m_HrefInfos = new List<HrefInfo_>();
/// <summary>
/// 文本构造器
/// </summary>
protected static readonly StringBuilder s_TextBuilder = new StringBuilder();
/// <summary>
/// 超链接正则
/// </summary>
private static readonly Regex s_HrefRegex =
new Regex(@"<a i=([^>\n\s]+)>(.*?)(</a>)", RegexOptions.Singleline);
//
private static readonly Regex s_VertexFilter = new Regex(@"(|[ \n\r\t]+)", RegexOptions.Singleline);
VertexHelper _toFill = null;
/// <summary>
/// 是否使用超链接 默认未False
/// </summary>
bool bool_IsLink = false;
private Action<string> linkFunc_Cb = null;
private RectTransform rect_Parent;
private RectTransform Rect_Parent
{
get
{
if (rect_Parent == null)
{
Transform trans = this.transform.parent != null ? this.transform.parent.transform : this.transform;
rect_Parent = trans.GetComponent<RectTransform>();
}
return rect_Parent;
}
}
//设置 文本 超链接的点击回调事件
public void Set_TextLinkFuncCB(Action<string> linkFunc_Cb)
{
bool_IsLink = true;
if (this.linkFunc_Cb != null)
{
this.linkFunc_Cb = null;
}
this.linkFunc_Cb = linkFunc_Cb;
OnPopulateMesh(_toFill);
}
//字符顶点数
const int perCharVerCount = 4;
/// <summary>
/// 文本构造器
/// </summary>
protected static readonly StringBuilder textRebuild = new StringBuilder();
protected override void OnPopulateMesh(VertexHelper toFill)
{
if (toFill == null)
{
return;
}
_toFill = toFill;
//TODO 编辑器状态下这里不执行， 方便调试看到效果用
if (!bool_IsLink)
{
m_Text = GetOutputText_Nomal(text);
base.OnPopulateMesh(toFill);
return;
}
var orignText = m_Text;
m_OutputText = GetOutputText_Init(text);
m_Text = m_OutputText;
text = m_OutputText;
base.OnPopulateMesh(toFill);
m_Text = orignText;
GetOutputText(text, toFill.currentVertCount);
UIVertex vert = new UIVertex();
// 处理超链接包围框
foreach (var hrefInfo in m_HrefInfos)
{
hrefInfo.boxes.Clear();
if (hrefInfo.startIndex >= toFill.currentVertCount)
{
continue;
}
// 将超链接里面的文本顶点索引坐标加入到包围框
toFill.PopulateUIVertex(ref vert, hrefInfo.startIndex);
var pos = vert.position;
var bounds = new Bounds(pos, Vector3.zero);
Vector3 previousPos = Vector3.zero;
for (int i = hrefInfo.startIndex, m = hrefInfo.endIndex; i < m; i++)
{
if (i >= toFill.currentVertCount)
{
break;
}
toFill.PopulateUIVertex(ref vert, i);
pos = vert.position;
if ((i - hrefInfo.startIndex) % 4 == 1)
{
previousPos = pos;
}
if (previousPos != Vector3.zero && (i - hrefInfo.startIndex) % 4 == 0 && pos.x < previousPos.x) // 换行重新添加包围框
{
hrefInfo.boxes.Add(new Rect(bounds.min, bounds.size));
bounds = new Bounds(pos, Vector3.zero);
}
else
{
bounds.Encapsulate(pos); // 扩展包围框
}
}
hrefInfo.boxes.Add(new Rect(bounds.min, bounds.size));
}
if (this.gameObject.activeInHierarchy)
{
StartCoroutine(RefrehLayout());
}
}
IEnumerator RefrehLayout()
{
yield return new WaitForEndOfFrame();
LayoutRebuilder.ForceRebuildLayoutImmediate(Rect_Parent);
}
//初始化超链接文本 获取最终结果的定点数用
string GetOutputText_Init(string outputText)
{
s_TextBuilder.Length = 0;
m_HrefInfos.Clear();
var indexText = 0;
foreach (Match match in s_HrefRegex.Matches(outputText))
{
s_TextBuilder.Append(outputText.Substring(indexText, match.Index - indexText));
s_TextBuilder.Append("<i><b><color=#f49037>"); // 超链接颜色
s_TextBuilder.Append(match.Groups[2].Value);
s_TextBuilder.Append("</color></b></i>");
indexText = match.Index + match.Length;
}
s_TextBuilder.Append(outputText.Substring(indexText, outputText.Length - indexText));
return s_TextBuilder.ToString();
}
/// <summary>
/// 获取超链接解析后的最后输出文本
/// </summary>
/// <returns></returns>
string GetOutputText(string outputText, int currentVertCount)
{
s_TextBuilder.Length = 0;
m_HrefInfos.Clear();
var indexText = 0;
int vertCount = Regex.Replace(Regex.Replace(outputText.ToString(), @"\s", ""), @"<(.*?)>", "").Length * 4;
int vercCount_Offset_Start = 0;
int vercCount_Offset_End = 0;
bool isLineCup = false;
if (currentVertCount > vertCount)
{
isLineCup = true;
vercCount_Offset_Start = 80;
vercCount_Offset_End = 88;
}
foreach (Match match in s_HrefRegex.Matches(outputText))
{
s_TextBuilder.Append(outputText.Substring(indexText, match.Index - indexText));
int offset_Len = 0;
if (isLineCup)
{
offset_Len = (s_TextBuilder.Length - Regex.Replace(s_TextBuilder.ToString(), @"<(.*?)>", "").Length) * 4;
}
s_TextBuilder.Append("<i><b><color=#f49037>"); // 超链接颜色
var str = Regex.Replace(s_TextBuilder.ToString(), @"\s", "");
var group = match.Groups[1];
var hrefInfo = new HrefInfo_
{
startIndex = Regex.Replace(str, @"<(.*?)>", "").Length * 4 + vercCount_Offset_Start + offset_Len, // 超链接里的文本起始顶点索引
endIndex = (Regex.Replace(str, @"<(.*?)>", "").Length +
Regex.Replace(Regex.Replace(match.Groups[2].ToString(), @"\s", "")
, @"<(.*?)>", "").Length - 1) * 4 + 3 + vercCount_Offset_End + offset_Len,
name = group.Value
};
m_HrefInfos.Add(hrefInfo);
//Debug.Log($"顶点信息，开始的：{hrefInfo.startIndex}，结束的：{hrefInfo.endIndex}");
s_TextBuilder.Append(match.Groups[2].Value);
s_TextBuilder.Append("</color></b></i>");
indexText = match.Index + match.Length;
}
s_TextBuilder.Append(outputText.Substring(indexText, outputText.Length - indexText));
return s_TextBuilder.ToString();
}
//获取祛除掉超链接 保留普通文本 保证配置里超链接标签的文本 在其他地方也可以正常使用，只有调用了超链接初始化的 才会给超链接形式的文本
string GetOutputText_Nomal(string outputText)
{
s_TextBuilder.Length = 0;
m_HrefInfos.Clear();
var indexText = 0;
MatchCollection matchs = s_HrefRegex.Matches(outputText);
if (matchs.Count <= 0)
{
return outputText;
}
foreach (Match match in matchs)
{
s_TextBuilder.Append(outputText.Substring(indexText, match.Index - indexText));
s_TextBuilder.Append(match.Groups[2].Value);
indexText = match.Index + match.Length;
}
s_TextBuilder.Append(outputText.Substring(indexText, outputText.Length - indexText));
return s_TextBuilder.ToString();
}
public void OnPointerClick(PointerEventData eventData)
{
Vector2 lp;
RectTransformUtility.ScreenPointToLocalPointInRectangle(
rectTransform, eventData.position, eventData.pressEventCamera, out lp);
foreach (var hrefInfo in m_HrefInfos)
{
var boxes = hrefInfo.boxes;
for (var i = 0; i < boxes.Count; ++i)
{
if (boxes[i].Contains(lp))
{
//Debug.Log("技能 超链接 点击了：" + hrefInfo.name);
linkFunc_Cb?.Invoke(hrefInfo.name);
return;
}
}
}
}
}
/// <summary>
/// 超链接信息类
/// </summary>
class HrefInfo_
{
public int startIndex;
public int endIndex;
public string name;
public readonly List<Rect> boxes = new List<Rect>();
}
使用方法
1、文本框内使用富文本，见截图
2、要使该文本的超链接功能生效，调用即可：
Set_TextLinkFuncCB((string i) =>
{
Debug.Log($"点击了：{
i}");
});
可以设置回调的灵活性就比较高了，各位自己扩展
Demo工程内截图
Demo地址：
https://github.com/Panda0000000000000/TextLink.git