UGUI中CustomFont（BMFont）字体使用与制作

首先使用工具Bitmap Font Generator生成.fnt和图集贴图,教程参考Unity3D-使用Bitmap Font Generator自定义字体 这里主要介绍根据Text格式的.fnt和贴图 在unity中自定义字体

• 生成字体教程 上代码（Unity版本5.6.0f3） 生成字体文件后必须重启unity才能生效，否则字体文件不能正确加载（unity bug或者我没找到方法刷新unity，知道的请指教）

  using UnityEngine;
  using UnityEditor;
  using System.Collections.Generic;
  
  
  public class BMFontEditor : EditorWindow {
      public TextAsset fontPosTbl;
      public Texture fontTexture;
      public Vector2 scrollPos;
  
      struct ChrRect {
          public int id;
          public int x;
          public int y;
          public int w;
          public int h;
          public int xofs;
          public int yofs;
  
          public int index;
          public float uvX;
          public float uvY;
          public float uvW;
          public float uvH;
          public float vertX;
          public float vertY;
          public float vertW;
          public float vertH;
          public float width;
      }
  
  
      // add menu
      [MenuItem("Tools/BMFontTools")]
      static void Init() {
          EditorWindow.GetWindow(typeof(BMFontEditor));
  
      }
  
      // layout window
      void OnGUI() {
          //EditorGUILayout.BeginScrollView(scrollPos);
          EditorGUILayout.BeginVertical();
  
          // use .fnt(.txt)
          fontTexture = (Texture)EditorGUILayout.ObjectField("Font Texture", fontTexture, typeof(Texture), false);
  
          EditorGUILayout.Space();
          EditorGUILayout.LabelField("Use BMFont fnt File", EditorStyles.boldLabel);
          EditorGUILayout.LabelField("(must Font Descriptor select Text)", EditorStyles.boldLabel);
  
          fontPosTbl = (TextAsset)EditorGUILayout.ObjectField("BMFont fnt (.fnt)", fontPosTbl, typeof(TextAsset), false);
          if (GUILayout.Button("Create(创建后必须重启生效)")) {
  
              if (fontTexture == null) this.ShowNotification(new GUIContent("No Font Texture selected"));
              else if (fontPosTbl == null) this.ShowNotification(new GUIContent("No Font Position Table file selected"));
              else {
                  CalcChrRect(fontPosTbl, fontTexture);
              }
          }
          EditorGUILayout.LabelField("(Must Restart unity  valid!)", EditorStyles.whiteBoldLabel);
          EditorGUILayout.LabelField("*********************************", EditorStyles.largeLabel);
          EditorGUILayout.EndVertical();
          //EditorGUILayout.EndScrollView();
      }
  
      void OnInspectorUpdate() {
          this.Repaint();
      }
  
  
      void CalcChrRect(TextAsset posTbl, Texture tex) {
          string fileName = AssetDatabase.GetAssetPath(fontPosTbl);
          string texName = AssetDatabase.GetAssetPath(tex);
          string fontName = System.IO.Path.GetFileNameWithoutExtension(fileName);
          string fontPath = fileName.Replace(".fnt", ".fontsettings");
          string matPath = fileName.Replace(".fnt", ".mat");
          float imgw = (float)tex.width;
          float imgh = (float)tex.height;
          string txt = posTbl.text;
  
          List<ChrRect> tblList = new List<ChrRect>();
          foreach (string line in txt.Split('\n')) {
              if (line.IndexOf("char id=") == 0) {
                  ChrRect d = GetChrRect(line, imgw, imgh);
                  tblList.Add(d);
              }
          }
          if(tblList.Count==0)
          {
              new GUIContent("Failed");
              return;
          }
  
          ChrRect[] tbls = tblList.ToArray();
          Font font = new  Font();
          font.name = fontName;
          SetCharacterInfo(tbls, font);
  
  
          Material mat = new Material(Shader.Find("Unlit/Transparent"));
          mat.mainTexture = tex;
          mat.name = fontName;
          font.material = mat;
  
  
           Debug.Log(System.IO.Path.GetFileNameWithoutExtension(fileName));
          Debug.Log(fileName);
  
          AssetDatabase.CreateAsset(mat, matPath);
          AssetDatabase.CreateAsset(font, fontPath);
          AssetDatabase.SaveAssets();
          this.ShowNotification(new GUIContent("Complete"));
          AssetDatabase.Refresh(ImportAssetOptions.ForceUpdate);
      }
  
      // over write custom font by new CharacterInfo
      void SetCharacterInfo(ChrRect[] tbls, Font fontObj) {
          CharacterInfo[] nci = new CharacterInfo[tbls.Length];
          for (int i = 0; i < tbls.Length; i++) {
              nci[i].index = tbls[i].index;
              nci[i].advance = (int)tbls[i].width;
              nci[i].uv.x = tbls[i].uvX;
              nci[i].uv.y = tbls[i].uvY;
              nci[i].uv.width = tbls[i].uvW;
              nci[i].uv.height = tbls[i].uvH;
              nci[i].vert.x = tbls[i].vertX;
              nci[i].vert.y = tbls[i].vertY;
              nci[i].vert.width = tbls[i].vertW;
              nci[i].vert.height = tbls[i].vertH;
          }
          fontObj.characterInfo = nci;
      }
  
      // get font table one line.
      ChrRect GetChrRect(string line, float imgw, float imgh) {
          ChrRect d = new ChrRect();
  
          foreach (string s in line.Split(' ')) {
              if (s.IndexOf("id=") >= 0) d.id = GetParamInt(s, "id=");
              else if (s.IndexOf("x=") >= 0) d.x = GetParamInt(s, "x=");
              else if (s.IndexOf("y=") >= 0) d.y = GetParamInt(s, "y=");
              else if (s.IndexOf("width=") >= 0) d.w = GetParamInt(s, "width=");
              else if (s.IndexOf("height=") >= 0) d.h = GetParamInt(s, "height=");
              else if (s.IndexOf("xoffset=") >= 0) d.xofs = GetParamInt(s, "xoffset=");
              else if (s.IndexOf("yoffset=") >= 0) d.yofs = GetParamInt(s, "yoffset=");
              else if (s.IndexOf("xadvance=") >= 0) d.width = GetParamInt(s, "xadvance=");
          }
          d.index = d.id;
          d.uvX = (float)d.x / imgw;
          d.uvY = (float)(imgh-(d.y)) / imgh;
          d.uvW = (float)d.w / imgw;
          //d.uvH = (float)-d.h / imgh;
          d.uvH = (float)-d.h / imgh;
  
          d.vertX = (float)d.xofs;
          d.vertY = (float)d.yofs;
          d.vertW = d.w;
          d.vertH = d.h;
  
          return d;
      }
  
      // "wd=int" to int
      int GetParamInt(string s, string wd) {
          if (s.IndexOf(wd) >= 0) {
              int v;
              if (int.TryParse(s.Substring(wd.Length), out v)) return v;
          }
          return int.MaxValue;
      }
  }
  

  将脚本放在Unity工程的Editor目录下 点击Tools→BMFontTools按钮

打开界面

托入资源，.fnt文件必须是Text文本结构的，不能是Xml和Binary(Bitmap Font Generator在这里面配置)

点击生成

生成后必须重启unity才能生效，否则字体文件不能正确加载（unity bug或者我没找到方法刷新unity） **

• 文字换行问题 设置字体的LineSpacing属性，为文字的高度，这里设置应该是128，一般不用