unity平台的预处理

在开发中，特别是unity的跨平台中，我们常常会在各个平台游走，如安卓版，苹果版，PC版......。在此不同的平台上，有可能我们须要做不同的操作。然而我们就能够用unity的自带的平台宏定义方式来做平台的推断。Unity帮我们定义了例如以下平台预处理:

 名称 描写叙述UNITY_EDITORDefine for calling Unity Editor scripts from your game code.UNITY_STANDALONE_OSXPlatform define for compiling/executing code specifically for Mac OS (This includes Universal, PPC and Intel architectures).UNITY_DASHBOARD_WIDGETPlatform define when creating code for Mac OS dashboard widgets.UNITY_STANDALONE_WINUse this when you want to compile/execute code for Windows stand alone applications.UNITY_STANDALONE_LINUXUse this when you want to compile/execute code for Linux stand alone applications.UNITY_STANDALONEUse this to compile/execute code for any standalone platform (Mac, Windows or Linux).UNITY_WEBPLAYERPlatform define for web player content (this includes Windows and Mac Web player executables).UNITY_WIIPlatform define for compiling/executing code for the Wii console.UNITY_IPHONEPlatform define for compiling/executing code for the iPhone platform.UNITY_ANDROIDPlatform define for the Android platform.UNITY_PS3Platform define for running PlayStation 3 code.UNITY_XBOX360Platform define for executing Xbox 360 code.UNITY_NACLPlatform define when compiling code for Google native client (this will be set additionally to UNITY_WEBPLAYER).UNITY_FLASHPlatform define when compiling code for Adobe Flash. 

 

   以后我们能够依据如上宏定义就能够去轻而易举的非常easy去在我们代码中增加推断了。我举个简单样例，例如以下:

using UnityEngine;  using System.Collections;    public class Recompile : MonoBehaviour  {        private string platform = string.Empty;      // Use this for initialization      void Start()      {          DebugPlatformMesaage();      }        void DebugPlatformMesaage()      {   #if UNITY_EDITOR          platform = "hi,大家好,我是在unity编辑模式下";  #elif UNITY_XBOX360         platform="hi，大家好,我在XBOX360平台";  #elif UNITY_IPHONE         platform="hi，大家好,我是IPHONE平台";  #elif UNITY_ANDROID         platform="hi，大家好,我是ANDROID平台";  #elif UNITY_STANDALONE_OSX         platform="hi，大家好,我是OSX平台";  #elif UNITY_STANDALONE_WIN         platform="hi，大家好,我是Windows平台";  #endif          Debug.Log("Current Platform:" + platform);      }  }  

上面假设我是在Editor状态下的话，就能看见打印出:

我们也能够自定义宏定义，在PlayerSetting中定义：

比如我在上面圈起来的地方填写一个CUSTOM_ITF这个预编译指令。然后在DebugPlatformMesaage函数尾部增加这句话

//新加入的内容  #if CUSTOM_ITF          customMsg = "我自己定义了预编译";  #endif          Debug.Log(customMsg);  

然后我们执行看下，你就能在控制台看见我们输出的信息了：

 当我们把我们自己定义的宏定义给去掉的时候，我们打印的信息就不会出来。

 

除了这些，unity中还有各个版本号的宏定义，一般开发插件的大牛都会用到。

 

UNITY_2_6Platform define for the major version of Unity 2.6.UNITY_2_6_1Platform define for specific version 1 from the major release 2.6.UNITY_3_0Platform define for the major version of Unity 3.0.UNITY_3_0_0Platform define for the specific version 0 of Unity 3.0.UNITY_3_1Platform define for major version of Unity 3.1.UNITY_3_2Platform define for major version of Unity 3.2.UNITY_3_3Platform define for major version of Unity 3.3.UNITY_3_4Platform define for major version of Unity 3.4.UNITY_3_5Platform define for major version of Unity 3.5.UNITY_4_0Platform define for major version of Unity 4.0.UNITY_4_0_1Platform define for major version of Unity 4.0.1.UNITY_4_1Platform define for major version of Unity 4.1.UNITY_4_2Platform define for major version of Unity 4.2.