[Game Development][Unity]The use of macro definitions

Several Ways of Writing Platform Judgment

The first way of writing #if and #endif

//Android平台
#if UNITY_ANDROID
   Debug.Log("Android");
#endif
//苹果平台
#if UNITY_IPHONE
    Debug.Log("IOS");
#endif
//Windows平台
#if UNITY_STANDALONE_WIN
    Debug.Log("Windows");
#endif

The second #if #else #endif writing method supports logical operators!

// #if !UNITY_EDITOR逻辑运算符!同样适用
#if UNITY_EDITOR    
    const string GAMEDLL = "__Internal";
#else
    const string GAMEDLL = "gamed";
#endif

The third way of writing #if #elif #endif

#if UNITY_EDITOR 
    const string GAMEDLL = "Editor";
#elif UNITY_IPHONE
    const string GAMEDLL = "IOS";
#elif UNITY_ANDROID
    const string GAMEDLL = "Android";
#endif

C# code judgment platform

if (Application.platform == RuntimePlatform.Android)
    {
        Debug.Log("Android");
    }else if(Application.platform == RuntimePlatform.IPhonePlayer)
    {
        Debug.Log("IOS");
    }
    else if (Application.platform == RuntimePlatform.WindowsEditor)
    {
        Debug.Log("Window");
    }
}

The platforms supported by Unity #define directives are as follows:

Attributes:	Function:
UNITY_EDITOR	#define directive for calling Unity editor scripts from game code.
UNITY_EDITOR_WIN	#define directive for editor code on Windows.
UNITY_EDITOR_OSX	#define directives for editor code on Mac OS X
UNITY_STANDALONE_OSX	#define directive specifically for compiling/executing code for Mac OS X (including Universal, PPC and Intel architectures).
UNITY_STANDALONE_WIN	#define directive for compiling/executing code specifically for Windows standalone applications.
UNITY_STANDALONE_LINUX	#define directive for compiling/executing code specifically for Linux standalone applications.
UNITY_STANDALONE	#define directive for compiling/executing code for any independent platform (Mac OS X, Windows or Linux).
UNITY_WII	Compile/execute #define directives for Wii console code.
UNITY_IOS	#define directive for compiling/executing iOS platform code.
UNITY_IPHONE	obsolete. Use UNITY_IOS instead.
UNITY_ANDROID	The #define directive for the Android platform.
UNITY_PS4	#define directive to run PlayStation 4 code.
UNITY_SAMSUNGTV	Execute the #define directive of the Samsung TV code.
UNITY_XBOXONE	A #define directive that executes Xbox One code.
UNITY_TIZEN	The #define directive for the Tizen platform.
UNITY_TVOS	The #define directive for the Apple TV platform.
UNITY_WSA	通用Windows平台的#define指令。此外，NETFX_CORE是在针对.NET Core编译C＃文件并使用.NET脚本后端时定义的。
UNITY_WSA_10_0	通用Windows平台的#define指令。另外，WINDOWS_UWP是在针对.NET Core编译C＃文件时定义的。
UNITY_WINRT	与UNITY_WSA相同。
UNITY_WINRT_10_0	相当于UNITY_WSA_10_0
UNITY_WEBGL	WebGL的#define指令。
UNITY_FACEBOOK	Facebook平台的#define指令（WebGL或Windows独立版）。
UNITY_ADS	从游戏代码调用Unity Ads方法的#define指令。版本5.2及以上。
UNITY_ANALYTICS	从游戏代码调用Unity Analytics方法的#define指令。版本5.2及以上。
UNITY_ASSERTIONS	断言控制过程的#define指令。

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