重点提示：当前的文本扩展支持多个超链接，支持修改超链接规则和支持修改超链接颜色。
近期在邮件文本中用到了超链接。最初是在邮件窗口中新加一个按钮用来超链接跳转，之后发现效果表现不如直接在文本中添加，后经过几个小时的资料查询将遇到的解决方法和问题贴出来。
方案一：换用TMP组件
问题：需要制作字体库等额外操作，改动较大不太适合。
方案二：网上找相关Text组件扩展
问题：在大多数扩展中，仅支持一个超链接文本。当文本中出现多个超链接文本时，只会响应第一个匹配的超链接点击事件。
最后在GitHub中找到了一个比较适合的Text扩展，支持多个正则超链接规则：GitHub - setchi/uGUI-Hypertext: Hypertext for uGUI
这里的解决方案，就是在这个脚本上进行修改而来的。原脚本中，每个超链接对应独立的点击事件，以及超链接颜色修改。更详细可直接看支持库中的例子。
根据需要，绑定超链接唯一点击事件，添加颜色开关等等，具体可直接查看代码：
///
/// 《超链接文本》支持多个链接 支持正则表达式
/// 当前版本修改于 uGUI-Hypertext GitHub:https://github.com/setchi/uGUI-Hypertext/tree/master
/// 新增超链接颜色修改控制。
/// 统一事件点击回调
/// 默认支持href匹配
/// 版本：0.10.0
/// using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.EventSystems;
using UnityEngine.UI;namespace Hyperlink
{/// <summary>/// 顶点池子/// </summary>/// <typeparam name="T"></typeparam>internal class ObjectPool<T> where T : new(){private readonly Stack<T> _stack = new Stack<T>();private readonly Action<T> _getAction;private readonly Action<T> _releaseAction;/// <summary>/// 总数/// </summary>public int Count { get; set; }/// <summary>/// 没有被使用的数量/// </summary>public int UnusedCount => _stack.Count;/// <summary>/// 已经使用的数量/// </summary>public int UsedCount => Count - UnusedCount;public ObjectPool(Action<T> onGetAction, Action<T> onRelease){_getAction = onGetAction;_releaseAction = onRelease;}public T Get(){T element;if (_stack.Count == 0){element = new T();Count++;}else{element = _stack.Pop();}_getAction?.Invoke(element);return element;}public void Release(T element){if (_stack.Count > 0 && ReferenceEquals(_stack.Peek(), element)){UnityEngine.Debug.LogError("试图归还已经归还的对象。");}_releaseAction?.Invoke(element);_stack.Push(element);}}/// <summary>/// 超链接信息块/// </summary>internal class LinkInfo{public readonly int StartIndex;public readonly int Length;public readonly string Link = null;public readonly string Text;public readonly Color Color;public readonly bool OverwriteColor = false;public readonly ClickLinkEvent Callback;public List<Rect> Boxes;public LinkInfo(int startIndex, int length, Color? color, ClickLinkEvent callback){StartIndex = startIndex;Length = length;Link = null;Text = null;OverwriteColor = color.HasValue;if (color.HasValue){Color = color.Value;}Callback = callback;Boxes = new List<Rect>();}public LinkInfo(int startIndex, int length, string link, string text, Color? color, ClickLinkEvent callback){StartIndex = startIndex;Length = length;Link = link;Text = text;OverwriteColor = color.HasValue;if (color.HasValue){Color = color.Value;}Callback = callback;Boxes = new List<Rect>();}public LinkInfo(int startIndex, string link, string text, Color? color, ClickLinkEvent callback) : this(startIndex, text.Length, link, text, color,callback){}public LinkInfo(int startIndex, string link, string text, ClickLinkEvent callback) : this(startIndex, link, text, Color.blue, callback){}}/// <summary>/// 超链接点击事件/// </summary>[Serializable]public class ClickLinkEvent : UnityEvent<string,string>{}/// <summary>/// 超链接正则表达式/// </summary>[Serializable]public class RegexPattern{public string pattern;public Color color;public bool overwriteColor = false;public RegexPattern(string regexPattern, Color color,bool overwriteColor = true){this.pattern = regexPattern;this.overwriteColor = overwriteColor;this.color = color;}public RegexPattern(string regexPattern,bool overwriteColor = true):this(regexPattern,Color.blue,overwriteColor){}}public class TextHyperlink : Text, IPointerClickHandler{private const int CharVertex = 6;private const char Tab = '\t', LineFeed = '\n', Space = ' ', LesserThan = '<', GreaterThan = '>';/// <summary>/// 看不见顶点的字符/// </summary>private readonly char[] _invisibleChars ={Space,Tab,LineFeed};/// <summary>/// 超链接信息块/// </summary>private readonly List<LinkInfo> _links = new List<LinkInfo>();/// <summary>/// 字符顶点池/// </summary>private static readonly ObjectPool<List<UIVertex>> UIVerticesPool = new ObjectPool<List<UIVertex>>(null, l => l.Clear());/// <summary>/// 字符索引映射/// </summary>private int[] _charIndexMap;private Canvas _root;private Canvas RootCanvas => _root ? _root : (_root = GetComponentInParent<Canvas>());/// <summary>/// 超链接匹配规则/// </summary>public List<RegexPattern> linkRegexPattern = new List<RegexPattern>(){new(@"<a href=([^>\n\s]+)>(.*?)(</a>)"),};[SerializeField]private ClickLinkEvent _onClickLink = new ClickLinkEvent();/// <summary>/// 超链接点击事件/// </summary>public ClickLinkEvent onClickLink{get => _onClickLink;set => _onClickLink = value;}#region PopulateMeshprivate readonly UIVertex[] _tempVerts = new UIVertex[4];protected override void OnPopulateMesh(VertexHelper toFill){if (font == null){return;}m_DisableFontTextureRebuiltCallback = true;var extents = rectTransform.rect.size;var settings = GetGenerationSettings(extents);settings.generateOutOfBounds = true;cachedTextGenerator.PopulateWithErrors(text, settings, gameObject);var verts = cachedTextGenerator.verts;var unitsPerPixel = 1 / pixelsPerUnit;var vertCount = verts.Count;if (vertCount <= 0){toFill.Clear();return;}var roundingOffset = new Vector2(verts[0].position.x, verts[0].position.y) * unitsPerPixel;roundingOffset = PixelAdjustPoint(roundingOffset) - roundingOffset;toFill.Clear();if (roundingOffset != Vector2.zero){for (var i = 0; i < vertCount; ++i){var tempVertsIndex = i & 3;_tempVerts[tempVertsIndex] = verts[i];_tempVerts[tempVertsIndex].position *= unitsPerPixel;_tempVerts[tempVertsIndex].position.x += roundingOffset.x;_tempVerts[tempVertsIndex].position.y += roundingOffset.y;if (tempVertsIndex == 3){toFill.AddUIVertexQuad(_tempVerts);}}}else{for (var i = 0; i < vertCount; ++i){var tempVertsIndex = i & 3;_tempVerts[tempVertsIndex] = verts[i];_tempVerts[tempVertsIndex].position *= unitsPerPixel;if (tempVertsIndex == 3){toFill.AddUIVertexQuad(_tempVerts);}}}var vertices = UIVerticesPool.Get();toFill.GetUIVertexStream(vertices);GenerateCharIndexMap(vertices.Count < text.Length * CharVertex);_links.Clear();TryAddMatchLink();GenerateHrefBoxes(ref vertices);toFill.Clear();toFill.AddUIVertexTriangleStream(vertices);UIVerticesPool.Release(vertices);m_DisableFontTextureRebuiltCallback = false;}/// <summary>/// 生成超链接包围框/// </summary>/// <param name="vertices"></param>private void GenerateHrefBoxes(ref List<UIVertex> vertices){var verticesCount = vertices.Count;for (var i = 0; i < _links.Count; i++){var linkInfo = _links[i];var startIndex = _charIndexMap[linkInfo.StartIndex];var endIndex = _charIndexMap[linkInfo.StartIndex + linkInfo.Length - 1];for (var textIndex = startIndex; textIndex <= endIndex; textIndex++){var vertexStartIndex = textIndex * CharVertex;if (vertexStartIndex + CharVertex > verticesCount){break;}var min = Vector2.one * float.MaxValue;var max = Vector2.one * float.MinValue;for (var vertexIndex = 0; vertexIndex < CharVertex; vertexIndex++){var vertex = vertices[vertexStartIndex + vertexIndex];if (linkInfo.OverwriteColor){vertex.color = linkInfo.Color;}vertices[vertexStartIndex + vertexIndex] = vertex;var pos = vertices[vertexStartIndex + vertexIndex].position;if (pos.y < min.y){min.y = pos.y;}if (pos.x < min.x){min.x = pos.x;}if (pos.y > max.y){max.y = pos.y;}if (pos.x > max.x){max.x = pos.x;}}linkInfo.Boxes.Add(new Rect {min = min, max = max});}linkInfo.Boxes = CalculateLineBoxes(linkInfo.Boxes);}}/// <summary>/// 计算行包围框/// </summary>/// <param name="boxes"></param>/// <returns></returns>private static List<Rect> CalculateLineBoxes(List<Rect> boxes){var lineBoxes = new List<Rect>();var lineStartIndex = 0;for (var i = 1; i < boxes.Count; i++){if (boxes[i].xMin >= boxes[i - 1].xMin){continue;}lineBoxes.Add(CalculateAABB(boxes.GetRange(lineStartIndex, i - lineStartIndex)));lineStartIndex = i;}if (lineStartIndex < boxes.Count){lineBoxes.Add(CalculateAABB(boxes.GetRange(lineStartIndex, boxes.Count - lineStartIndex)));}return lineBoxes;}private static Rect CalculateAABB(IReadOnlyList<Rect> rects){var min = Vector2.one * float.MaxValue;var max = Vector2.one * float.MinValue;for (var i = 0; i < rects.Count; i++){if (rects[i].xMin < min.x){min.x = rects[i].xMin;}if (rects[i].yMin < min.y){min.y = rects[i].yMin;}if (rects[i].xMax > max.x){max.x = rects[i].xMax;}if (rects[i].yMax > max.y){max.y = rects[i].yMax;}}return new Rect {min = min, max = max};}/// <summary>/// 生成字节索引映射/// </summary>/// <param name="verticesReduced"></param>private void GenerateCharIndexMap(bool verticesReduced){if (_charIndexMap == null || _charIndexMap.Length < text.Length){Array.Resize(ref _charIndexMap, text.Length);}if (!verticesReduced){for (var i = 0; i < _charIndexMap.Length; i++){_charIndexMap[i] = i;}return;}var offset = 0;var inTag = false;for (var i = 0; i < text.Length; i++){var character = text[i];if (inTag){offset--;if (character == GreaterThan){inTag = false;}}else if (supportRichText && character == LesserThan){offset--;inTag = true;}else if (_invisibleChars.Contains(character)){offset--;}_charIndexMap[i] = Mathf.Max(0, i + offset);}}#endregionprivate Vector3 CalculateLocalPosition(Vector3 position, Camera pressEventCamera){if (!RootCanvas){return Vector3.zero;}if (RootCanvas.renderMode == RenderMode.ScreenSpaceOverlay){return transform.InverseTransformPoint(position);}RectTransformUtility.ScreenPointToLocalPointInRectangle(rectTransform,position,pressEventCamera,out var localPosition);return localPosition;}void IPointerClickHandler.OnPointerClick(PointerEventData eventData){var localPosition = CalculateLocalPosition(eventData.position, eventData.pressEventCamera);foreach (var linkInfo in _links){if (!linkInfo.Boxes.Any(t => t.Contains(localPosition))) continue;var subText = text.Substring(linkInfo.StartIndex, linkInfo.Length);var link = linkInfo.Link ?? subText;var content = linkInfo.Text ?? subText;linkInfo.Callback?.Invoke(link,content);}}#region Add Text Link/// <summary>/// 尝试添加超链接/// </summary>private void TryAddMatchLink(){foreach (var entry in linkRegexPattern){var matches = Regex.Matches(text, entry.pattern, RegexOptions.Singleline);foreach (Match match in matches){var regex = new Regex(entry.pattern, RegexOptions.Singleline);var regexMatch = regex.Match(match.Value);var overwriteColor = entry.overwriteColor == true ? entry.color : (Color?)null;if (regexMatch.Success){var group = match.Groups[1];AddLink(match.Index, group.Value,match.Value, overwriteColor, _onClickLink);}else{AddLink(match.Index, match.Value.Length, overwriteColor, _onClickLink);}}}}private void CheckLinkException(int startIndex, int length, ClickLinkEvent onClick){if (onClick == null){throw new ArgumentNullException(nameof(onClick));}if (startIndex < 0 || startIndex > text.Length - 1){throw new ArgumentOutOfRangeException(nameof(startIndex));}if (length < 1 || startIndex + length > text.Length){throw new ArgumentOutOfRangeException(nameof(length));}}private void AddLink(int startIndex, int length, Color? linkColor, ClickLinkEvent onClick){CheckLinkException(startIndex, length, onClick);_links.Add(new LinkInfo(startIndex, length, linkColor, onClick));}private void AddLink(int startIndex, string link, string content, Color? linkColor, ClickLinkEvent onClick){CheckLinkException(startIndex, content.Length, onClick);_links.Add(new LinkInfo(startIndex, link, content, linkColor, onClick));}protected void AddLink(int startIndex, string link, string content, ClickLinkEvent onClick){CheckLinkException(startIndex, content.Length, onClick);_links.Add(new LinkInfo(startIndex, link, content, onClick));}protected void CleanLink(){_links.Clear();linkRegexPattern.Clear();}#endregion#region Hyperlink_Test#if Hyperlink_Testprotected override void OnEnable(){base.OnEnable();onClickLink.AddListener(OnClickLinkText);}protected override void OnDisable(){base.OnDisable();onClickLink.RemoveListener(OnClickLinkText);}/// <summary>/// 当前点击超链接回调/// </summary>private void OnClickLinkText(string link,string content){Debug.Log($"超链接信息：{link}\n{content}");Application.OpenURL(link);}#endif#endregion}
}
编辑器面板扩展：
继承自UGUI-Text面板，在原有数据显示上，添加可编辑的扩展属性。
using UnityEditor;
using UnityEditor.UI;namespace Hyperlink.Editor
{[CustomEditor(typeof(TextHyperlink), true)][CanEditMultipleObjects]public class TextHyperlinkEditor : TextEditor{private SerializedProperty _linkRegexPattern;private SerializedProperty _onClickLink;protected override void OnEnable(){base.OnEnable();_linkRegexPattern = serializedObject.FindProperty("linkRegexPattern");_onClickLink = serializedObject.FindProperty("_onClickLink");}public override void OnInspectorGUI(){base.OnInspectorGUI();serializedObject.Update();EditorGUILayout.PropertyField(_linkRegexPattern);EditorGUILayout.Space();EditorGUILayout.PropertyField(_onClickLink);serializedObject.ApplyModifiedProperties();}}
}效果图：
在使用过程中，应策划需求加超链接下划线，参考这篇文档：Unity超链接：支持点击事件，下划线以及自定义颜色-CSDN博客
添加了下划线颜色和下划线符号。
/// <summary>/// 超链接默认颜色/// </summary>private static readonly Color LinkColor = new Color(75 / 255f, 122 / 255f, 247 / 255f, 1f); /// <summary>/// 下划线/// </summary>public string underline = "￣";#region Under Lineprivate void DrawUnderLine(VertexHelper vh){foreach (var link in _links){foreach (var rect in link.Boxes){var height = rect.height;// 左下var pos1 = new Vector3(rect.min.x, rect.min.y, 0);// 右下var pos2 = new Vector3(rect.max.x, rect.max.y, 0) - new Vector3(0, height, 0);MeshUnderLine(vh, pos1, pos2, link.Color);}}}private void MeshUnderLine(VertexHelper vh, Vector2 startPos, Vector2 endPos, Color lineColor){ var extents = rectTransform.rect.size;var setting = GetGenerationSettings(extents);var underlineText = new TextGenerator();underlineText.Populate(underline, setting);var lineVer = underlineText.verts; //"￣"的的顶点数组var pos = new Vector3[4];pos[0] = startPos + new Vector2(-8, 0);pos[3] = startPos + new Vector2(-8, -4f);pos[2] = endPos + new Vector2(8, -4f);pos[1] = endPos + new Vector2(8, 0);if (lineVer.Count != 4) return;var tempVerts = new UIVertex[4];for (var i = 0; i < 4; i++){tempVerts[i] = lineVer[i];tempVerts[i].color = lineColor;tempVerts[i].position = pos[i];tempVerts[i].uv0 = lineVer[i].uv0;tempVerts[i].uv1 = lineVer[i].uv1;tempVerts[i].uv2 = lineVer[i].uv2;tempVerts[i].uv3 = lineVer[i].uv3;}vh.AddUIVertexQuad(tempVerts);}#endregion优化后的完整代码：
///
/// 《超链接文本》支持多个链接 支持正则表达式
/// 当前版本修改于 uGUI-Hypertext GitHub:https://github.com/setchi/uGUI-Hypertext/tree/master
/// 新增超链接颜色修改控制。
/// 统一事件点击回调
/// 默认支持href匹配
/// 添加超链接下划线
/// 添加默认超链接颜色
/// 版本：0.10.1
/// using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.EventSystems;
using UnityEngine.UI;namespace Hyperlink
{/// <summary>/// 顶点池子/// </summary>/// <typeparam name="T"></typeparam>internal class ObjectPool<T> where T : new(){private readonly Stack<T> _stack = new Stack<T>();private readonly Action<T> _getAction;private readonly Action<T> _releaseAction;/// <summary>/// 总数/// </summary>public int Count { get; set; }/// <summary>/// 没有被使用的数量/// </summary>public int UnusedCount => _stack.Count;/// <summary>/// 已经使用的数量/// </summary>public int UsedCount => Count - UnusedCount;public ObjectPool(Action<T> onGetAction, Action<T> onRelease){_getAction = onGetAction;_releaseAction = onRelease;}public T Get(){T element;if (_stack.Count == 0){element = new T();Count++;}else{element = _stack.Pop();}_getAction?.Invoke(element);return element;}public void Release(T element){if (_stack.Count > 0 && ReferenceEquals(_stack.Peek(), element)){UnityEngine.Debug.LogError("试图归还已经归还的对象。");}_releaseAction?.Invoke(element);_stack.Push(element);}}/// <summary>/// 超链接信息块/// </summary>internal class LinkInfo{public readonly int StartIndex;public readonly int Length;public readonly string Link = null;public readonly string Text;public readonly Color Color = new Color(75 / 255f, 122 / 255f, 247 / 255f, 1f);public readonly bool OverwriteColor = false;public readonly ClickLinkEvent Callback;public List<Rect> Boxes;public LinkInfo(int startIndex, int length, Color? color, ClickLinkEvent callback){StartIndex = startIndex;Length = length;Link = null;Text = null;OverwriteColor = color.HasValue;if (color.HasValue){Color = color.Value;}Callback = callback;Boxes = new List<Rect>();}public LinkInfo(int startIndex, int length, string link, string text, Color? color, ClickLinkEvent callback){StartIndex = startIndex;Length = length;Link = link;Text = text;OverwriteColor = color.HasValue;if (color.HasValue){Color = color.Value;}Callback = callback;Boxes = new List<Rect>();}public LinkInfo(int startIndex, string link, string text, Color? color, ClickLinkEvent callback) : this(startIndex, text.Length, link, text, color,callback){}public LinkInfo(int startIndex, string link, string text, ClickLinkEvent callback) : this(startIndex, link, text, Color.blue, callback){}}/// <summary>/// 超链接点击事件/// </summary>[Serializable]public class ClickLinkEvent : UnityEvent<string,string>{}/// <summary>/// 超链接正则表达式/// </summary>[Serializable]public class RegexPattern{public string pattern;public Color color;public bool overwriteColor = false;public RegexPattern(string regexPattern, Color color,bool overwriteColor = true){this.pattern = regexPattern;this.overwriteColor = overwriteColor;this.color = color;}}public class TextHyperlink : Text, IPointerClickHandler{private const int CharVertex = 6;private const char Tab = '\t', LineFeed = '\n', Space = ' ', LesserThan = '<', GreaterThan = '>';/// <summary>/// 看不见顶点的字符/// </summary>private readonly char[] _invisibleChars ={Space,Tab,LineFeed};/// <summary>/// 超链接信息块/// </summary>private readonly List<LinkInfo> _links = new List<LinkInfo>();/// <summary>/// 字符顶点池/// </summary>private static readonly ObjectPool<List<UIVertex>> UIVerticesPool = new ObjectPool<List<UIVertex>>(null, l => l.Clear());/// <summary>/// 字符索引映射/// </summary>private int[] _charIndexMap;/// <summary>/// 超链接默认颜色/// </summary>private static readonly Color LinkColor = new Color(75 / 255f, 122 / 255f, 247 / 255f, 1f); private Canvas _root;private Canvas RootCanvas => _root ? _root : (_root = GetComponentInParent<Canvas>());[SerializeField]private ClickLinkEvent _onClickLink = new ClickLinkEvent();/// <summary>/// 超链接匹配规则/// </summary>public List<RegexPattern> linkRegexPattern = new List<RegexPattern>(){new(@"<a href=([^>\n\s]+)>(.*?)(</a>)", LinkColor),};/// <summary>/// 下划线/// </summary>public string underline = "￣";/// <summary>/// 超链接点击事件/// </summary>public ClickLinkEvent onClickLink{get => _onClickLink;set => _onClickLink = value;}#region PopulateMeshprivate readonly UIVertex[] _tempVerts = new UIVertex[4];protected override void OnPopulateMesh(VertexHelper toFill){if (font == null){return;}m_DisableFontTextureRebuiltCallback = true;var extents = rectTransform.rect.size;var settings = GetGenerationSettings(extents);settings.generateOutOfBounds = true;cachedTextGenerator.PopulateWithErrors(text, settings, gameObject);var verts = cachedTextGenerator.verts;var unitsPerPixel = 1 / pixelsPerUnit;var vertCount = verts.Count;if (vertCount <= 0){toFill.Clear();return;}var roundingOffset = new Vector2(verts[0].position.x, verts[0].position.y) * unitsPerPixel;roundingOffset = PixelAdjustPoint(roundingOffset) - roundingOffset;toFill.Clear();if (roundingOffset != Vector2.zero){for (var i = 0; i < vertCount; ++i){var tempVertsIndex = i & 3;_tempVerts[tempVertsIndex] = verts[i];_tempVerts[tempVertsIndex].position *= unitsPerPixel;_tempVerts[tempVertsIndex].position.x += roundingOffset.x;_tempVerts[tempVertsIndex].position.y += roundingOffset.y;if (tempVertsIndex == 3){toFill.AddUIVertexQuad(_tempVerts);}}}else{for (var i = 0; i < vertCount; ++i){var tempVertsIndex = i & 3;_tempVerts[tempVertsIndex] = verts[i];_tempVerts[tempVertsIndex].position *= unitsPerPixel;if (tempVertsIndex == 3){toFill.AddUIVertexQuad(_tempVerts);}}}var vertices = UIVerticesPool.Get();toFill.GetUIVertexStream(vertices);GenerateCharIndexMap(vertices.Count < text.Length * CharVertex);_links.Clear();TryAddMatchLink();GenerateHrefBoxes(ref vertices);toFill.Clear();toFill.AddUIVertexTriangleStream(vertices);DrawUnderLine(toFill);UIVerticesPool.Release(vertices);m_DisableFontTextureRebuiltCallback = false;}/// <summary>/// 生成超链接包围框/// </summary>/// <param name="vertices"></param>private void GenerateHrefBoxes(ref List<UIVertex> vertices){var verticesCount = vertices.Count;for (var i = 0; i < _links.Count; i++){var linkInfo = _links[i];var startIndex = _charIndexMap[linkInfo.StartIndex];var endIndex = _charIndexMap[linkInfo.StartIndex + linkInfo.Length - 1];for (var textIndex = startIndex; textIndex <= endIndex; textIndex++){var vertexStartIndex = textIndex * CharVertex;if (vertexStartIndex + CharVertex > verticesCount){break;}var min = Vector2.one * float.MaxValue;var max = Vector2.one * float.MinValue;for (var vertexIndex = 0; vertexIndex < CharVertex; vertexIndex++){var vertex = vertices[vertexStartIndex + vertexIndex];if (linkInfo.OverwriteColor){vertex.color = linkInfo.Color;}vertices[vertexStartIndex + vertexIndex] = vertex;var pos = vertices[vertexStartIndex + vertexIndex].position;if (pos.y < min.y){min.y = pos.y;}if (pos.x < min.x){min.x = pos.x;}if (pos.y > max.y){max.y = pos.y;}if (pos.x > max.x){max.x = pos.x;}}linkInfo.Boxes.Add(new Rect {min = min, max = max});}linkInfo.Boxes = CalculateLineBoxes(linkInfo.Boxes);}}/// <summary>/// 计算行包围框/// </summary>/// <param name="boxes"></param>/// <returns></returns>private static List<Rect> CalculateLineBoxes(List<Rect> boxes){var lineBoxes = new List<Rect>();var lineStartIndex = 0;for (var i = 1; i < boxes.Count; i++){if (boxes[i].xMin >= boxes[i - 1].xMin){continue;}lineBoxes.Add(CalculateAABB(boxes.GetRange(lineStartIndex, i - lineStartIndex)));lineStartIndex = i;}if (lineStartIndex < boxes.Count){lineBoxes.Add(CalculateAABB(boxes.GetRange(lineStartIndex, boxes.Count - lineStartIndex)));}return lineBoxes;}private static Rect CalculateAABB(IReadOnlyList<Rect> rects){var min = Vector2.one * float.MaxValue;var max = Vector2.one * float.MinValue;for (var i = 0; i < rects.Count; i++){if (rects[i].xMin < min.x){min.x = rects[i].xMin;}if (rects[i].yMin < min.y){min.y = rects[i].yMin;}if (rects[i].xMax > max.x){max.x = rects[i].xMax;}if (rects[i].yMax > max.y){max.y = rects[i].yMax;}}return new Rect {min = min, max = max};}/// <summary>/// 生成字节索引映射/// </summary>/// <param name="verticesReduced"></param>private void GenerateCharIndexMap(bool verticesReduced){if (_charIndexMap == null || _charIndexMap.Length < text.Length){Array.Resize(ref _charIndexMap, text.Length);}if (!verticesReduced){for (var i = 0; i < _charIndexMap.Length; i++){_charIndexMap[i] = i;}return;}var offset = 0;var inTag = false;for (var i = 0; i < text.Length; i++){var character = text[i];if (inTag){offset--;if (character == GreaterThan){inTag = false;}}else if (supportRichText && character == LesserThan){offset--;inTag = true;}else if (_invisibleChars.Contains(character)){offset--;}_charIndexMap[i] = Mathf.Max(0, i + offset);}}#region Under Lineprivate void DrawUnderLine(VertexHelper vh){foreach (var link in _links){foreach (var rect in link.Boxes){var height = rect.height;// 左下var pos1 = new Vector3(rect.min.x, rect.min.y, 0);// 右下var pos2 = new Vector3(rect.max.x, rect.max.y, 0) - new Vector3(0, height, 0);MeshUnderLine(vh, pos1, pos2, link.Color);}}}private void MeshUnderLine(VertexHelper vh, Vector2 startPos, Vector2 endPos, Color lineColor){ var extents = rectTransform.rect.size;var setting = GetGenerationSettings(extents);var underlineText = new TextGenerator();underlineText.Populate(underline, setting);var lineVer = underlineText.verts; //"￣"的的顶点数组var pos = new Vector3[4];pos[0] = startPos + new Vector2(-8, 0);pos[3] = startPos + new Vector2(-8, -4f);pos[2] = endPos + new Vector2(8, -4f);pos[1] = endPos + new Vector2(8, 0);if (lineVer.Count != 4) return;var tempVerts = new UIVertex[4];for (var i = 0; i < 4; i++){tempVerts[i] = lineVer[i];tempVerts[i].color = lineColor;tempVerts[i].position = pos[i];tempVerts[i].uv0 = lineVer[i].uv0;tempVerts[i].uv1 = lineVer[i].uv1;tempVerts[i].uv2 = lineVer[i].uv2;tempVerts[i].uv3 = lineVer[i].uv3;}vh.AddUIVertexQuad(tempVerts);}#endregion#endregionprivate Vector3 CalculateLocalPosition(Vector3 position, Camera pressEventCamera){if (!RootCanvas){return Vector3.zero;}if (RootCanvas.renderMode == RenderMode.ScreenSpaceOverlay){return transform.InverseTransformPoint(position);}RectTransformUtility.ScreenPointToLocalPointInRectangle(rectTransform,position,pressEventCamera,out var localPosition);return localPosition;}void IPointerClickHandler.OnPointerClick(PointerEventData eventData){var localPosition = CalculateLocalPosition(eventData.position, eventData.pressEventCamera);foreach (var linkInfo in _links){if (!linkInfo.Boxes.Any(t => t.Contains(localPosition))) continue;var subText = text.Substring(linkInfo.StartIndex, linkInfo.Length);var link = linkInfo.Link ?? subText;var content = linkInfo.Text ?? subText;linkInfo.Callback?.Invoke(link,content);}}#region Add Text Link/// <summary>/// 尝试添加超链接/// </summary>private void TryAddMatchLink(){foreach (var entry in linkRegexPattern){var matches = Regex.Matches(text, entry.pattern, RegexOptions.Singleline);foreach (Match match in matches){var regex = new Regex(entry.pattern, RegexOptions.Singleline);var regexMatch = regex.Match(match.Value);var overwriteColor = entry.overwriteColor == true ? entry.color : (Color?)null;if (regexMatch.Success){var group = match.Groups[1];AddLink(match.Index, group.Value,match.Value, overwriteColor, _onClickLink);}else{AddLink(match.Index, match.Value.Length, overwriteColor, _onClickLink);}}}}private void CheckLinkException(int startIndex, int length, ClickLinkEvent onClick){if (onClick == null){throw new ArgumentNullException(nameof(onClick));}if (startIndex < 0 || startIndex > text.Length - 1){throw new ArgumentOutOfRangeException(nameof(startIndex));}if (length < 1 || startIndex + length > text.Length){throw new ArgumentOutOfRangeException(nameof(length));}}private void AddLink(int startIndex, int length, Color? linkColor, ClickLinkEvent onClick){CheckLinkException(startIndex, length, onClick);_links.Add(new LinkInfo(startIndex, length, linkColor, onClick));}private void AddLink(int startIndex, string link, string content, Color? linkColor, ClickLinkEvent onClick){CheckLinkException(startIndex, content.Length, onClick);_links.Add(new LinkInfo(startIndex, link, content, linkColor, onClick));}protected void AddLink(int startIndex, string link, string content, ClickLinkEvent onClick){CheckLinkException(startIndex, content.Length, onClick);_links.Add(new LinkInfo(startIndex, link, content, onClick));}protected void CleanLink(){_links.Clear();linkRegexPattern.Clear();}#endregion#region Hyperlink_Test//#if Hyperlink_Testprotected override void OnEnable(){base.OnEnable();onClickLink.AddListener(OnClickLinkText);}protected override void OnDisable(){base.OnDisable();onClickLink.RemoveListener(OnClickLinkText);}/// <summary>/// 当前点击超链接回调/// </summary>private void OnClickLinkText(string link,string content){Debug.Log($"超链接信息：{link}\n{content}");Application.OpenURL(link);}//#endif#endregion}
}
编辑器面板：
using UnityEditor;
using UnityEditor.UI;namespace Hyperlink.Editor
{[CustomEditor(typeof(TextHyperlink), true)][CanEditMultipleObjects]public class TextHyperlinkEditor : TextEditor{private SerializedProperty _linkRegexPattern;private SerializedProperty _underline;private SerializedProperty _onClickLink;protected override void OnEnable(){base.OnEnable();_underline = serializedObject.FindProperty("underline");_linkRegexPattern = serializedObject.FindProperty("linkRegexPattern");_onClickLink = serializedObject.FindProperty("_onClickLink");}public override void OnInspectorGUI(){base.OnInspectorGUI();serializedObject.Update();EditorGUILayout.LabelField("Hyperlink", EditorStyles.boldLabel);EditorGUI.indentLevel++;EditorGUILayout.PropertyField(_underline);EditorGUILayout.PropertyField(_linkRegexPattern);EditorGUI.indentLevel--;EditorGUILayout.Space();EditorGUILayout.PropertyField(_onClickLink);serializedObject.ApplyModifiedProperties();}}
}效果图：
最后，目前是将超链接下划线的颜色和超链接颜色绑定起来，如果有需要可以在超链接信息块中定义下划线相关的配置。
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