electron学习

时间 2019-12-24

标签 electron 学习繁體版

原文原文链接

一、安装nodejsjavascript

二、用npm全局安装electron（能够不全局安装，后面在项目中安装）html

三、建立一个目录my_app，下面建立3个文件：package.json、main.js、index.htmljava

四、编缉index.html内容：node

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title>Hello World!</title>
  </head>
  <body>
    <h1>Hello World!</h1>
    We are using node <script>document.write(process.versions.node)</script>,
    Chrome <script>document.write(process.versions.chrome)</script>,
    and Electron <script>document.write(process.versions.electron)</script>.
  </body>
</html>

五、编缉main.js内容：web

const {app, BrowserWindow,globalShortcut,ipcMain} = require('electron')
const path = require('path')
const url = require('url')

// Keep a global reference of the window object, if you don't, the window will
// be closed automatically when the JavaScript object is garbage collected.
let win

function createWindow () {
  // Create the browser window.
  win = new BrowserWindow({width: 800, height: 600,resizable:false})
  //hide menubar
  win.setAutoHideMenuBar(true)
  // and load the index.html of the app.
  win.loadURL('file://'+__dirname+'/index.html')

  // Open the DevTools.
  //win.webContents.openDevTools()

  // Emitted when the window is closed.
  win.on('closed', () => {
    // Dereference the window object, usually you would store windows
    // in an array if your app supports multi windows, this is the time
    // when you should delete the corresponding element.
    win = null
  })
}

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.on('ready', createWindow)

// Quit when all windows are closed.
app.on('window-all-closed', () => {
  // On macOS it is common for applications and their menu bar
  // to stay active until the user quits explicitly with Cmd + Q
  if (process.platform !== 'darwin') {
    app.quit()
  }
})

app.on('activate', () => {
  // On macOS it's common to re-create a window in the app when the
  // dock icon is clicked and there are no other windows open.
  if (win === null) {
    createWindow()
  }
})

// In this file you can include the rest of your app's specific main process
// code. You can also put them in separate files and require them here.

六、编缉package.json内容：chrome

{
  "name": "demo_app",
  "version": "0.1.0",
  "main": "main.js",
}

七、运行npm

在demo_app目录下，执行electron .json

若是没有全局安装electron，能够在目录下执行npm install --save-dev electron. 而后在执行在demo_app/node_modules/.bin/目录下执行electron ../../windows

--save-dev会在package.json中加入一行：app

"devDependencies": {
"electron": "^1.4.15"
}

八、打包

使用electron-package进行打包，生成目录demo_app_release。

electron-packager ./demo_app --platform=win32 --out ../demo_app_release --version 1.4.13 --overwrite --icon=./images/app.ico

九、脚本与依赖

修改package.json:

{
  "name": "demo_app",
  "version": "0.1.0",
  "main": "main.js",
  "scripts": {
    "start": "electron .",
    "package": "electron-packager ./ demo_app --platform=win32 --out ../demo_app_release --version 1.4.13 --overwrite --icon=./images/app.ico"
  },
  "author": "gelare",
  "devDependencies": {
    "electron": "^1.4.15"
  },
  "dependencies": {
  "log4js": "^1.1.0"
  }
}

在demo_app目录下

执行npm install会安装依赖，包括electron与log4js。

执行npm start会运行程序。

执行npm run-script package进行打包。

十、快捷键

添加ctrl+q，退出程序，在createWindow函数最后加上：

globalShortcut.unregisterAll();
 globalShortcut.register('ctrl+q',function(){
    app.quit();
  });

注册快捷键向主页面发送事件：

globalShortcut.register('alt+c',()=>{
    win.webContents.send('global-shortcut','change');
  });

接收与处理事件：

修改index.html，引入脚本：

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title>Hello World!</title>
  </head>
  <body>
    <h1>Hello World!</h1>
    We are using node <script>document.write(process.versions.node)</script>,
    Chrome <script>document.write(process.versions.chrome)</script>,
    and Electron <script>document.write(process.versions.electron)</script>.
    <script src="index.js"></script>
  </body>
</html>

增长index.js:

const {
    ipcRenderer,
    desktopCapturer,
} = require('electron');

ipcRenderer.on('global-shortcut',(event,arg) => {
        switch(arg) {
            case 'change':
                var body = document.querySelector('body');
                body.style.backgroundColor = "lightblue";
                break;
        }
})

十一、菜单