Unity图文混排实现

实现在文本中插入图片，图片替换符使用如下格式 //XML: &lt;quad index=0 size=60&gt; 代码中<quad index=0 size=60>

using System.Collections;using System.Collections.Generic;using System.Text.RegularExpressions;using UnityEngine;using UnityEngine.UI;[RequireComponent(typeof(Text))]public class TextTagHook : BaseMeshEffect{public class SpriteTagInfo{public int index;public int stringIndex;public Vector2 size;public bool isVisible = true;}//in XML: &lt;quad index=0 size=60&gt; <quad index=0 size=60>private static readonly Regex spriteTagRegex = new Regex(@"<quad\s+index=(\d+)\s+size=(\d*\.?\d+%?)(\s+width=(\d*\.?\d+%?))?\s*>", RegexOptions.Singleline);private static readonly Regex spriteTagReplacementRegex = new Regex(@"{}", RegexOptions.Singleline);private static readonly Regex tagRegex = new Regex(@"<.*?>", RegexOptions.Singleline);private static readonly Regex whitespaceRegex = new Regex(@"\s+", RegexOptions.Singleline);public RectTransform[] tagObjects = new RectTransform[] { };private Text _text;public Text text{get{if (_text == null){_text = GetComponent<Text>();}return _text;}}private List<SpriteTagInfo> spriteTags = new List<SpriteTagInfo>();private string lastContent;private bool lastBestFit;private int lastVertexCount;private bool isContentDirty{get{return true;}}private bool isValid;public override void ModifyMesh(VertexHelper vh){if (!IsActive()) return;if (isContentDirty){lastContent = text.text;lastBestFit = text.resizeTextForBestFit;lastVertexCount = text.cachedTextGenerator.vertexCount;spriteTags.Clear();try{foreach (Match match in spriteTagRegex.Matches(lastContent)){SpriteTagInfo spriteTag = new SpriteTagInfo();spriteTag.index = int.Parse(match.Groups[1].Value);spriteTag.stringIndex = match.Index;spriteTag.size = new Vector2(float.Parse(match.Groups[2].Value), float.Parse(match.Groups[2].Value));if (match.Groups[4].Success){spriteTag.size.x *= float.Parse(match.Groups[4].Value);}spriteTag.isVisible = text.cachedTextGenerator.vertexCount / 4 > spriteTag.stringIndex;spriteTags.Add(spriteTag);}if (text.cachedTextGenerator.vertexCount / 4 != text.cachedTextGenerator.characterCount){string toGenerateContent = spriteTagRegex.Replace(lastContent, "{}");toGenerateContent = tagRegex.Replace(toGenerateContent, string.Empty);toGenerateContent = whitespaceRegex.Replace(toGenerateContent, string.Empty);int index = 0;foreach (Match match in spriteTagReplacementRegex.Matches(toGenerateContent)){spriteTags[index].stringIndex = match.Index - index;spriteTags[index].isVisible = true;index++;}}isValid = true;}catch (System.Exception e){isValid = false;}}for (int i = 0; i < tagObjects.Length; i++){if (tagObjects[i] != null){tagObjects[i].localScale = Vector3.zero;}}if (isValid){for (int i = 0; i < spriteTags.Count; i++){SpriteTagInfo spriteTag = spriteTags[i];if (tagObjects.Length > spriteTag.index){var target = tagObjects[spriteTag.index];if (target == null) continue;if (spriteTag.isVisible){float unitsPerPixel = 1 / text.pixelsPerUnit;var verts = text.cachedTextGenerator.verts;Vector2 roundingOffset = new Vector2(verts[0].position.x, verts[0].position.y) * unitsPerPixel;roundingOffset = text.PixelAdjustPoint(roundingOffset) - roundingOffset;Vector3 pox1 = verts[spriteTag.stringIndex * 4 + 3].position;Vector3 pox2 = verts[spriteTag.stringIndex * 4 + 2].position;if (roundingOffset != Vector2.zero){pox1 *= unitsPerPixel;pox1.x += roundingOffset.x;pox1.y += roundingOffset.y;pox2 *= unitsPerPixel;pox2.x += roundingOffset.x;pox2.y += roundingOffset.y;}else{pox1 *= unitsPerPixel;pox2 *= unitsPerPixel;}target.localPosition = pox1;target.localScale = Vector3.one * (pox2.x - pox1.x) / spriteTag.size.x;}}}List<UIVertex> vertexList = new List<UIVertex>();vh.GetUIVertexStream(vertexList);for (int i = 0; i < spriteTags.Count; i++){if (!spriteTags[i].isVisible) continue;//UGUIText不支持<quad/>标签，表现为乱码，这里将他的uv全设置为0,清除乱码for (int m = spriteTags[i].stringIndex * 6; m < spriteTags[i].stringIndex * 6 + 6; m++){UIVertex tempVertex = vertexList[m];tempVertex.uv0 = Vector2.zero;tempVertex.uv1 = Vector2.zero;tempVertex.uv2 = Vector2.zero;tempVertex.uv3 = Vector2.zero;tempVertex.color = Color.clear;vertexList[m] = tempVertex;}}vh.Clear();vh.AddUIVertexTriangleStream(vertexList);}}}

将脚本挂到Text上，如下图，可以通过调整icon1和icon2的位置来调整图片显示的位置。