开启Sprite Pack
图集打包
Packing Tag设置成相同名字的图片就会被打包进同一个图集
a) 图集common_ui
b) 图集icon
查看图集
菜单 -> Window -> 2D -> Sprite Packer
获取图集中的Sprite
Sprite Pack打包的图集，Unity并没有给我们提供api来获取单个Sprite，只能通过先在编辑器中将Sprite绑定到脚本上的方式来获取。
1) 这边通过自定义Asset的方式来绑定Sprite
using System.Collections.Generic;
using UnityEngine;
[CreateAssetMenu]
public class Atlas : ScriptableObject
{
public List<Sprite> spriteList = new List<Sprite>();
private Dictionary<string, Sprite> _spriteDict;
public Sprite this[string name]
{
get
{
return GetSprite(name);
}
}
public Sprite GetSprite(string spriteName)
{
if (null == _spriteDict)
{
_spriteDict = new Dictionary<string, Sprite>();
foreach (var sprite in spriteList)
_spriteDict[sprite.name] = sprite;
}
if (!_spriteDict.TryGetValue(spriteName, out var sp))
Debug.LogError($"sprite not found: {spriteName} in atlas: {name}");
return sp;
}
}
2) 然后我们可以右键创建一个Atlas自定义资源
3) 然后我们可以选中新建的Atlas资源，然后将Sprite一个一个绑定到spriteList这个列表上
4) 在代码中使用
#if UNITY_EDITOR
using UnityEditor;
using UnityEngine;
using UnityEngine.UI;
public class AtlasUseDemo : MonoBehaviour
{
void Start()
{
//正式代码使用AssetBundle的方式来加载, 这边只是Demo直接用了UnityEditor的api来加载
var atlas = AssetDatabase.LoadAssetAtPath<Atlas>("Assets/Atlas/Atlas_ui/New Atlas.asset");
if (null == atlas)
{
Debug.Log($"atlas null");
return;
}
var img = GetComponent<Image>();
img.sprite = atlas.GetSprite("btn_back");
img.SetNativeSize();
}
}
#endif
一开始Image没有图片
运行起来后图片被设为btn_back
Atlas小工具
1) 自动把文件夹下的所有Sprite绑定到spriteList上
#if UNITY_EDITOR
using System.Collections.Generic;
using System.IO;
using UnityEditor;
using UnityEngine;
public class AtlasInitTool
{
[MenuItem("CONTEXT/Atlas/使用当前文件夹下的所有Sprite初始化")]
static void InitSpriteList(MenuCommand menuCMD)
{
var assetPath = AssetDatabase.GetAssetPath(menuCMD.context);
if (string.IsNullOrEmpty(assetPath)) return;
Debug.Log($"{assetPath}");
var atlas = menuCMD.context as Atlas;
if (null == atlas) return;
var dirPath = Path.GetDirectoryName(assetPath);
//Debug.Log($"dir: {dirPath}");
//文件夹下的所有Sprite添加到atlas下
var spriteList = new List<Sprite>();
FindAndAddSprite(spriteList, dirPath, "*.png");
FindAndAddSprite(spriteList, dirPath, "*.jpg");
FindAndAddSprite(spriteList, dirPath, "*.jpeg");
atlas.spriteList = spriteList;
EditorUtility.SetDirty(atlas);
Debug.Log($"finish");
}
private static void FindAndAddSprite(List<Sprite> spriteList, string dirPath, string pattern)
{
var files = Directory.GetFiles(dirPath, pattern, SearchOption.TopDirectoryOnly);
if (null == files || files.Length <= 0) return;
//Debug.Log($"{dirPath}, {pattern}, {files.Length}");
for (var i = 0; i < files.Length; ++i)
{
//Debug.Log($"sprite file: {files[i]}");
var arr = AssetDatabase.LoadAllAssetsAtPath(files[i]);
if (null != arr)
{
for (var j = 0; j < arr.Length; ++j)
{
var sprite = arr[j] as Sprite;
if (null != sprite)
{
spriteList.Add(sprite);
}
}
}
}
}
}
#endif
右键菜单就能看到
2) 导出图集工具，Unity只提供了预览工具，没法拿到图集图片
#if UNITY_EDITOR
using UnityEditor;
using UnityEditor.Sprites;
using UnityEngine;
using System.IO;
public class AtlasExportTool
{
[MenuItem("MyTools/PackSpritesAndExportSelectAtlas", true)]
static bool PackSpritesAndExportSelectAtlasValidate()
{
return null != Selection.activeObject;
}
[MenuItem("MyTools/PackSpritesAndExportSelectAtlas")]
static void PackSpritesAndExportSelectAtlas()
{
if (null == Selection.activeObject) return;
if (Application.isPlaying) return;
var assetPath = AssetDatabase.GetAssetPath(Selection.activeObject);
var imp = AssetImporter.GetAtPath(assetPath) as TextureImporter;
if (null == imp || TextureImporterType.Sprite != imp.textureType)
{
Debug.Log($"所选资源不是Sprite");
return;
}
if (string.IsNullOrEmpty(imp.spritePackingTag))
{
Debug.Log($"所选Sprite没有Packting Tag");
return;
}
string outDirPath = "_AtlasTemp";
if (!Directory.Exists(outDirPath))
{
Directory.CreateDirectory(outDirPath);
}
EditorUtility.DisplayProgressBar("RebuildAtlasCacheIfNeeded...", "RebuildAtlasCacheIfNeeded...", 0);
Packer.RebuildAtlasCacheIfNeeded(EditorUserBuildSettings.activeBuildTarget, true, Packer.Execution.ForceRegroup);
EditorUtility.ClearProgressBar();
Debug.Log($"atlasName: {imp.spritePackingTag}");
var textures = Packer.GetTexturesForAtlas(imp.spritePackingTag);
ExportTextures(outDirPath, textures);
Debug.Log($"finish");
}
[MenuItem("MyTools/PackSpritesAndExportAtlas")]
static void PackSpritesAndExportAtlas()
{
if (Application.isPlaying) return;
string outDirPath = "_AtlasTemp";
if (!Directory.Exists(outDirPath))
{
Directory.CreateDirectory(outDirPath);
}
EditorUtility.DisplayProgressBar("RebuildAtlasCacheIfNeeded...", "RebuildAtlasCacheIfNeeded...", 0);
Packer.RebuildAtlasCacheIfNeeded(EditorUserBuildSettings.activeBuildTarget, true, Packer.Execution.ForceRegroup);
EditorUtility.ClearProgressBar();
foreach (var atlasName in Packer.atlasNames)
{
Debug.Log($"atlasName: {atlasName}");
var textures = Packer.GetTexturesForAtlas(atlasName);
ExportTextures(outDirPath, textures);
}
Debug.Log($"finish");
}
static void ExportTextures(string outDirPath, Texture[] textures)
{
for (int i = 0; i < textures.Length; i++)
{
var tex = textures[i];
var tempRT = RenderTexture.GetTemporary(tex.width, tex.height, 0, RenderTextureFormat.ARGB32);
Graphics.SetRenderTarget(tempRT);
Graphics.Blit(tex, tempRT);
var resultTex = new Texture2D(tex.width, tex.height, TextureFormat.RGBA32, false);
resultTex.ReadPixels(new Rect(0, 0, tex.width, tex.height), 0, 0);
resultTex.Apply();
var bytes = resultTex.EncodeToPNG();
Graphics.SetRenderTarget(null);
RenderTexture.ReleaseTemporary(tempRT);
//var bytes = tex.EncodeToPNG();
var resultFilePath = "";
if (1 == textures.Length)
resultFilePath = Path.Combine(outDirPath, $"{tex.name}.png");
else
resultFilePath = Path.Combine(outDirPath, $"{tex.name}-Page{i}.png");
File.WriteAllBytes(resultFilePath, bytes);
}
}
}
#endif
导出的图集
参考
◄ Unity 『功能总结』►——创建ScriptableObject文件/填写/更改变量_臭臭~的博客-CSDN博客
Unity3d Ugui 22图集Sprite Packer_IT界老王的博客-CSDN博客_unity3d 图集
游戏开发unity资源管理系列：SpriteAtlas的Include in Build的作用探究（上）_Cloud Flower的博客-CSDN博客
标签：return,Sprite,Debug,var,using,图集,Pack From： https://www.cnblogs.com/sailJs/p/16477766.html