Unity 游戏框架搭建 (十二) 简易AssetBundle打包工具(二)

上篇文章中实现了基本的打包功能,在这篇我们来解决不同平台打AB包的问题。 本篇文章的核心api还是:

BuildPipeline.BuildAssetBundles (outPath, 0, EditorUserBuildSettings.activeBuildTarget);  

  在第三个参数中,只要传入不同平台 BuildTarget就可以了。目前只考虑Android和iOS平台。

区分iOS、Android平台。

  很简单,只要在上篇文章的QABEditor类中将原来的BuildAssetBundle方法分为BuildAssetBundleiOS和BuildAssetBundleAndroid即可。代码如下所示。

public class QABEditor      {        [MenuItem("QFramework/AB/Build iOS")]        public static void BuildABiOS()        {            string outputPath = QPath.ABBuildOutPutDir (RuntimePlatform.IPhonePlayer);            QIO.CreateDirIfNotExists (outputPath);            QABBuilder.BuildAssetBundles (BuildTarget.iOS);            AssetDatabase.Refresh ();        }        [MenuItem("QFramework/AB/Build Android")]        public static void BuildABAndroid()        {            string outputPath = QPath.ABBuildOutPutDir (RuntimePlatform.Android);            QIO.CreateDirIfNotExists (outputPath);            QABBuilder.BuildAssetBundles (BuildTarget.Android);            AssetDatabase.Refresh ();        }}

大家觉得代码中有几个类有些陌生。下面我来一一介绍下。

QPath.ABBuildOutPutDir(build target)

  QPath这个类在我的框架中是用来指定固定的路径用的,因为路径的代码全是字符串,不能让字符串暴露在各处都是,这样会影响代码的可读性。统一管理起来比较方便修改。ABBuildOutPutDir这个API的实现如下所示,就不多说了。

    /// <summary>    /// 所有的路径常量都在这里    /// </summary>    public class QPath     {        /// <summary>        /// 资源输出的路径        /// </summary>        public static string ABBuildOutPutDir(RuntimePlatform platform) {            string retDirPath = null;            switch (platform) {            case RuntimePlatform.Android:                retDirPath = Application.streamingAssetsPath + "/QAB/Android";                break;            case RuntimePlatform.IPhonePlayer:                retDirPath = Application.streamingAssetsPath + "/QAB/iOS";                break;            case RuntimePlatform.WindowsPlayer:            case RuntimePlatform.WindowsEditor:                retDirPath = Application.streamingAssetsPath + "/QAB/Windows";                break;            case RuntimePlatform.OSXPlayer:            case RuntimePlatform.OSXEditor:                retDirPath = Application.streamingAssetsPath + "/QAB/OSX";                break;            }            return retDirPath;        }        /// <summary>        /// 打包之前的源资源文件        /// </summary>        public static string SrcABDir  {            get {                return Application.dataPath + "/QArt/QAB";            }        }    }}

QIO.CreateDirIfNotExists (outputPath)

  QIO这个类是用来封装C#的System.IO和一些文件操作相关的API。CreateDirIfNotExists这个命名非常的傻瓜,会点英文就应该可以理解了。下面贴出实现代码,

using UnityEngine;  using System.Collections;  using System.IO;/// <summary>/// 各种文件的读写复制操作,主要是对System.IO的一些封装/// </summary>namespace QFramework {    public class QIO {        /// <summary>        /// 创建新的文件夹,如果存在则不创建        /// </summary>        public static void CreateDirIfNotExists(string dirFullPath)        {            if (!Directory.Exists (dirFullPath)) {                Directory.CreateDirectory (dirFullPath);            }        }    }}

QABBuilder

  QABBuilder只是封装了本文的核心API

BuildPipeline.BuildAssetBundles (outPath, 0, EditorUserBuildSettings.activeBuildTarget);  

  封装的原因是打AB包成功后,要对AB包进行一些处理,比如计算包尺寸,计算哈希或者md5值。主要是为了以后的热更新做准备的。看下QABBuilder核心实现.

    public class QABBuilder    {        public static string overloadedDevelopmentServerURL = "";        public static void BuildAssetBundles(BuildTarget buildTarget)        {            string outputPath = Path.Combine(QPlatform.ABundlesOutputPath,  QPlatform.GetPlatformName());            if (Directory.Exists (outputPath)) {                Directory.Delete (outputPath,true);            }            Directory.CreateDirectory (outputPath);            BuildPipeline.BuildAssetBundles(outputPath,BuildAssetBundleOptions.None,buildTarget);            GenerateVersionConfig (outputPath);            if(Directory.Exists(Application.streamingAssetsPath+"/QAB")){                Directory.Delete (Application.streamingAssetsPath+"/QAB",true);            }            Directory.CreateDirectory (Application.streamingAssetsPath+"/QAB");            FileUtil.ReplaceDirectory (QPlatform.ABundlesOutputPath,Application.streamingAssetsPath+"/QAB");            AssetDatabase.Refresh ();        }    }}

使用方式

  按这里  结果看这里(创建了iOS文件夹)

介绍完毕,睡觉了!