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*********************************************************************************************************** C++部分 //MyTest.h

#ifdef  _WIN32_#ifdef  MY_TEST_EXPORTS#define MY_TEST_API __declspec(dllexport)#define API_STDCALL __stdcall#else#define MY_TEST_API __declspec(dllimport)#endif#else#define MY_TEST_API#define CALLBACK#define API_STDCALL#endif#ifndef _MY_TEST_H_#define _MY_TEST_H_#endif

//MyTest.cpp

#include "MyTest.h"#include 
   
    typedef void (CALLBACK *MyTestCallBack)(char *szBuffer);MyTestCallBack m_myTestCallBack;extern "C" MY_TEST_API void TestApi(const char* str,MyTestCallBack callback){   callback("hello,I recv your str:"+str);}
   

*********************************************************************************************************** C#部分

using System.Collections;using System.Runtime.InteropServices;using System;using System.Collections.Generic;using UnityEngine;public class CSTest{public delegate void Cpp2CsCallBack(string str);#if UNITY_ANDROID[DllImport("u3dmydll")]public static extern void CallCppDllApi(string str,Cpp2CsCallBack cb);#else[DllImport("u3dmydll.dll")]public static extern void CallCppDllApi(string str,Cpp2CsCallBack cb);#endifpublic static void onDllCallBack(string str){Debug.Log(str);}}

调用： CSTest.CallCppDllApi("hello dll",CSTest.onDllCallBack);

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