一、环境

node 14.16.0
electron 12.2.3
darwin x64

二、安装

yarn add ffi-napi
yarn add -D @types/ffi-napi

npm install -g node-gyp

# python
c:/python3/python.exe

# 如果 报错 Could not install Visual Studio Build Tools.
# 则到 C:\Users\xx\.windows-build-tools 目录下 手工进行安装，安装成功后在执行上面的命令。
# windows 编译工具，需要用管理员身份运行 PowerShell
npm i -g --production windows-build-tools

cd node_modules/ref-napi
node-gyp configure
node-gyp build

cd node_modules/ffi-napi
yarn install

三、使用

import ffi from 'ffi-napi'
const ros = new ffi.Library('../dll/SDKlib_x64', {
  GetVersion: ['int', ['char']],
  Init: ['init', ['void']]
})

module.exports = {
  init() {
    return ros.Init()
  },
  getVersion(ver: number) {
    return ros.GetVersion(ver)
  }
}

<template>
  <div id="app">
    <div id="nav">
      <router-link to="/">Home</router-link> |
      <router-link to="/about">About</router-link>
    </div>
    <router-view />
  </div>
</template>

<script>
  import { init } from './assets/utils/sdk.ts'
  export default {
    name: 'App',
    created() {
      window.logger.info('init')
      init()
    }
  }
</script>

<style lang="less">
  #app {
    font-family: Avenir, Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-align: center;
    color: #2c3e50;
  }

  #nav {
    padding: 30px;

    a {
      font-weight: bold;
      color: #2c3e50;

      &.router-link-exact-active {
        color: #42b983;
      }
    }
  }
</style>

四、遇到的各种报错报错报错

No native build was found for platform=darwin arch=x64 runtime=electron abi=87 uv=1 libc=glibc node=14.16.0 electron=12.2.3 webpack=true

module.exports = {
  pluginOptions: {
    electronBuilder: {
      // node环境
      nodeIntegration: true,
      // webpack打包忽略 ffi-napi
      externals: ['ffi-napi', 'ref-napi']
    }
  }
}

could not find any vs

install vs
npm config set msvs_version 2022

Dynamic Linking Error: dlopen(../dll/IRSDKlib_x64.dylib, 2): image not found

不同系统下使用的动态链接库不同，mac 下是 .dylib, win 下是 .dll

var EXT = (Library.EXT = {
  linux: '.so',
  linux2: '.so',
  sunos: '.so',
  solaris: '.so',
  freebsd: '.so',
  openbsd: '.so',
  darwin: '.dylib',
  mac: '.dylib',
  win32: '.dll'
}[process.platform])

Uncaught Error: Dynamic Linking Error: Win32 error 126

路径问题，很可能就是没有找需要的 dll 动态库

Uncaught Error: Dynamic Linking Error: Win32 error 193

调用的动态库 dll 是 32 位的，而目标模块需要的是 64 位的

五、参考

node-ffi 使用指南