從零開始用electron整個跨平台桌面應用---基礎配置篇



1.安裝node、npm

node以及npm都需要是最新版本(版本過低有坑)

2.安裝淘寶鏡像cnpm(建議,下載較快)

npm install -g cnpm --registry=https://registry.npm.taobao.org

3.安裝electron

cnpm install -g electron

4.安裝打包輸出工具

cnpm install -g electron-packager

5.安裝electron 客戶端工具(選擇性,其實沒必要)

Electron.exe

 鏈接:http://pan.baidu.com/s/1mieJnLI 密碼:x2i8

 安裝完成雙擊electron.exe文件

6.新建一個文件夾,命名為electron,在文件夾目錄下,創建三個文件,package.json,main.js,index.htmlpackage.json可以直接npm init生成

 

package.json文件:

{
  "name": "your-app",
  "version": "0.1.0",
  "main": "main.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "electron .",
    "pack": "electron-packager . myFirstElectron --win --out ./dist --arch=x64 --app-version=0.0.1 --electron-version=9.0.5"
  },
  "author": "",
  "license": "ISC",
  "description": "",
  "dependencies": {
    "sqlite3": "^4.2.0"
  }
}

main.js文件:

const electron = require('electron');
// Module to control application life.
const {app} = electron;
// Module to create native browser window.
const {BrowserWindow} = electron;

// 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,
      webPreferences: { //If you add this sentence, you will not report an error
        nodeIntegration: 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 OS X 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 OS X 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.
var sqlite3 = require('sqlite3').verbose();
const path = require('path');
var db = new sqlite3.Database(path.join(__dirname, 'db.db'));

index.html文件:

<!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>

7.運行electron

安裝了客戶端可以直接拖入
未安裝就直接自定義下package.json,順帶把打包指令配置下
注意后面的版本--electron-version=9.0.5寫你自己的enectron版本(cmd命令electron -v)

"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"start": "electron .",
"pack": "electron-packager . myFirstElectron --win --out ./dist --arch=x64 --app-version=0.0.1 --electron-version=9.0.5"
},

8.集成sqlite3數據庫

為什么選擇sqlite3?

  • Electron作為現今比較流行的客戶端框架,勢必會用本地緩存,在以往軟件的一些緩存中一般用到的文件、日志等,這里提到的是sqlite3——輕量級數據庫。
  • Electron是完全符合node.js語法,並且支持很多第三方庫,sqlite3也是其中一塊,使用它首先需要具備node.js環境,這里不再贅述,安裝sqlite3:

npm install sqlite3 --save

安裝以后,發現Electron不能正常使用,會報出很多錯誤,比如缺少sqlite3模塊,找不到,但是明明裝了,這里需要對Sqlite3單獨編譯,

原因是:通過npm安裝的sqlite3模塊只實現了對node.js原生環境的支持,如果electron需要使用的話必須對其進行二次編輯。

1.首先進入到安裝好的模塊sqlite3目錄下

cd .\node_modules\sqlite3

2.安裝nan,並run,如果run失敗可以跳過

 

npm install nan --save
npm run prepublish

 

3.編譯下(可能會出現報錯)

 

node-gyp configure --module_name=node_sqlite3 --module_path=../lib/binding/electron-v1.6.6-win32-ia32
node-gyp rebuild -target=1.6.6 -arch=win32 -target_platform=win32 -dist-url=https://atom.io/download/electron/ -module_name=node_sqlite3 -module_path=../lib/binding/electron-v1.6.6-win32-ia32

4.如果要修改electron的版本,直接修改下方圖片標紅處就可以了。

 

詳細講解請點擊

node報錯解決方案(在使用node指令時可能會報錯)gyp ERR! stack Error: Could not find any Visual Studio installation



步驟一

 

npm install --global --production windows-build-tools

npm install -g node-gyp


步驟二

上面步驟一如果沒有安裝好python2.7,則安裝下

 

npm install --python=python2.7


npm config set python python2.7

 

 

 


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