React + Electron + Antd 写一个简单的计算器客户端

秒速五厘米 2021-10-01 08:48 342阅读 0赞

### 创建react项目 ###

create-react-app calculator

### 引入electron ###

yarn add electron --dev

### 引入antd ###

yarn add antd

### 引入electron-is-dev,用来判断当前是开发环境还是生产环境 ###

yarn add electron-is-dev

### 在public目录下加入electron.js, preload.js ###

electron.js

// Modules to control application life and create native browser window
    const { app, BrowserWindow, Menu } = require("electron");
    const path = require("path");
    const isDev = require("electron-is-dev");
    
    let mainWindow;
    
    function createWindow() {
      // Create the browser window.
      mainWindow = new BrowserWindow({
        width: 800,
        height: 600,
        webPreferences: {
          nodeIntegration: true,
          preload: path.join(__dirname, "preload.js"),
        },
      });
    
      // 清除顶部菜单
      Menu.setApplicationMenu(null);
    
      if (isDev) {
        mainWindow.loadURL("http://localhost:3000");
        mainWindow.openDevTools();
        // mainWindow.webContents.openDevTools();
      } else {
        mainWindow.loadFile("./build/index.html");
      }
    
      mainWindow.on("closed", function () {
        // 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.
        mainWindow = 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.whenReady().then(() => {
      createWindow();
    
      app.on("activate", function () {
        // 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 (BrowserWindow.getAllWindows().length === 0) createWindow();
      });
    });
    
    // Quit when all windows are closed, except on macOS. There, it's common
    // for applications and their menu bar to stay active until the user quits
    // explicitly with Cmd + Q.
    app.on("window-all-closed", function () {
      if (process.platform !== "darwin") app.quit();
    });
    
    // 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.

preload.js

// All of the Node.js APIs are available in the preload process.
    // It has the same sandbox as a Chrome extension.
    window.addEventListener("DOMContentLoaded", () => {
      const replaceText = (selector, text) => {
        const element = document.getElementById(selector);
        if (element) element.innerText = text;
      };
    
      for (const type of ["chrome", "node", "electron"]) {
        replaceText(`${type}-version`, process.versions[type]);
      }
    });

### 修改package.json ###

{
      ...
       "main": "public/electron.js",
       "homepage": ".",
       "scripts": {
            "start": "react-scripts start",
            "build": "react-scripts build",
            "test": "react-scripts test",
            "electron": "electron ."
        }
      ...
    }

### 运行程序 ###

# 运行react
    yarn start
    
    # 运行electron
    yarn electron

每次都运行两个命令很麻烦，使用concurrently和wait-on，将两个命令放在一起运行

yarn add concurrently wait-on --dev

### 修改package.json ###

{
      ...
      "scripts": {
            "electron": "concurrently \"react-scripts start\" \"wait-on http://localhost:3000 && electron .\""
        }
      ...
    }

### 客户端渲染使用react ###

计算器一般分为两块，一块显示计算结果，一块为按钮操作区，新建两个组件input-button.js, input-text.js

// # input-text.js
    
    import React, { Component } from "react";
    import { Input } from "antd";
    
    const { TextArea } = Input;
    
    class inText extends Component {
      render() {
        return (
          <TextArea
            type="text"
            id="content"
            autoSize={false}
            value={this.props.value}
            readOnly={true}
          />
        );
      }
    }
    export default inText;

// # input-button.js
    import React, { Component } from "react";
    import { Button } from "antd";
    import PropTypes from "prop-types";
    
    class inButton extends Component {
      static propTypes = {
        className: PropTypes.string,
      };
      static defaultProps = {
        className: "same_size",
      };
      render() {
        return (
          <Button
            type="button"
            className={this.props.className}
            value={this.props.value}
          >
            {this.props.value}
          </Button>
        );
      }
    }
    export default inButton;

App.js

import React, { Component } from "react";
    import Button from "./input-button";
    import Text from "./input-text";
    
    class App extends Component {
      constructor(props) {
        super(props);
        this.state = {
          string: "",
        };
        this.handleButton = this.handleButton.bind(this);
      }
    
      handleButton(e) {
        if (e.target.value !== undefined) {
          let instring = e.target.value;
          let prvcontent = this.state.string;
          let content = "";
          if (
            instring === "+" ||
            instring === "-" ||
            instring === "*" ||
            instring === "/"
          ) {
            content = prvcontent + " " + instring + " ";
          } else if (instring === "附加") {
            content = "";
          } else if (instring === "C") {
            content = "";
          } else if (instring === "Back") {
            if (prvcontent) {
              let newcontent = String(prvcontent);
              if (
                newcontent[newcontent.length - 1] === " " &&
                newcontent[newcontent.length - 3] === " "
              ) {
                prvcontent = newcontent.slice(0, newcontent.length - 3);
              } else {
                prvcontent = newcontent.slice(0, newcontent.length - 1);
              }
            }
            content = prvcontent;
          } else if (instring === "=") {
            if (prvcontent) {
              if (prvcontent.indexOf(" ") !== -1) {
                let arr = prvcontent.split(" ");
                let ans = [];
                let i = 0;
                while (i < arr.length) {
                  if (arr[i] === "") {
                    i++;
                  } else if (arr[i] === "+") {
                    ans.push(arr[i + 1]);
                    i += 2;
                  } else if (arr[i] === "-") {
                    ans.push(-arr[i + 1]);
                    i += 2;
                  } else if (arr[i] === "*") {
                    let a;
                    let b = ans.pop();
                    if (arr[i + 1] === "-") {
                      a = -arr[i + 2];
                      i += 3;
                    } else {
                      a = arr[i + 1];
                      i += 2;
                    }
                    ans.push(b * a);
                  } else if (arr[i] === "/") {
                    let a;
                    let b = ans.pop();
                    if (arr[i + 1] === "0") {
                      content = "ERROR!";
                      return;
                    } else if (arr[i + 1] === "-") {
                      a = -arr[i + 2];
                      i += 3;
                    } else {
                      a = arr[i + 1];
                      i += 2;
                    }
                    ans.push(b / a);
                  } else {
                    ans.push(arr[i]);
                    i++;
                  }
                }
                let fin_ans = parseFloat(ans[0]);
                for (i = 1; i < ans.length; i++) {
                  fin_ans += parseFloat(ans[i]);
                }
                content = fin_ans;
              } else {
                content = prvcontent;
              }
            } else {
              content = "";
            }
          } else {
            if (prvcontent && parseInt(prvcontent) !== 0) {
              content = prvcontent + instring;
            } else {
              content = instring;
            }
          }
          this.setState({
            string: content,
          });
        }
      }
    
      render() {
        return (
          <div id="main">
            <div id="input_text">
              <Text value={this.state.string} />
            </div>
            <div id="input_button" onClick={this.handleButton}>
              <Button value={1} />
              <Button value={2} />
              <Button value={3} />
              <Button value={"Back"} />
              <Button value={"C"} />
              <Button value={4} />
              <Button value={5} />
              <Button value={6} />
              <Button value={"+"} />
              <Button value={"-"} />
              <Button value={7} />
              <Button value={8} />
              <Button value={9} />
              <Button value={"*"} />
              <Button value={"/"} />
              <Button value={"附加"} />
              <Button value={0} />
              <Button value={"."} />
              <Button value={"="} className={"equal_size"} />
            </div>
          </div>
        );
      }
    }
    
    export default App;

index.js

import React from "react";
    import ReactDOM from "react-dom";
    import "./index.css";
    import App from "./App";
    import reportWebVitals from "./utils/reportWebVitals";
    
    ReactDOM.render(<App />, document.getElementById("root"));
    
    // If you want to start measuring performance in your app, pass a function
    // to log results (for example: reportWebVitals(console.log))
    // or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
    reportWebVitals();

index.css

@import '~antd/dist/antd.css';
    
    #main{
      margin: 0 auto;
      width: 100%;
      height: 100vh;
    }
    
    #input_text{
      padding: 3%;
      height: 25%;
      display: flex;
    }
    #input_button{
      /*border: 1px solid black;*/
      margin: 0 2%;
      width: 96%;
      height: 70%;
      display: flex;
      flex-wrap: wrap;
    }
    
    #input_text #content{
      flex: auto;
      resize: none;
      margin: 0;
      width: 100%;
      padding: 10px;
      font-size: 2vw;
      border: 1px solid #d9d9d9;
    }
    #input_button .same_size{
      flex: auto;
      margin: 1%;
      width: 18%;
      height: 20%;
      font-size: 2vw;
    }
    #input_button .equal_size{
      flex: auto;
      margin: 1%;
      width: 38%;
      height: 20%;
      font-size: 1.5vw;
    }

运行项目可以看到客户端

yarn electron

![6587214-bc61e5ece9451cbc.png][]

image.png

### 打包 ###

引入electron-builder

yarn add electron-builder --dev

### 修改package.json打包配置 ###

"build": {
        "productName": "react electron antd",
        "appId": "com.charming",
        "asar": true,
        "files": [
          "build/**/*"
        ],
        "dmg": {
          "artifactName": "react_electron_antd.dmg",
          "contents": [
            {
              "type": "link",
              "path": "/Applications",
              "x": 410,
              "y": 150
            },
            {
              "type": "file",
              "x": 130,
              "y": 150
            }
          ]
        },
        "nsis": {
          "oneClick": false, // 一键安装（安装在C盘）
          "allowToChangeInstallationDirectory": true,   // 允许自定义安装
          "shortcutName": "react-electron-antd"
        },
        "mac": {
          "target": "dmg",
          "icon": "icon.ico"
        },
        "win": {
          "target": "nsis",
          "icon": "icon.ico"
        },
        "directories": {
          "output": "dist/" // 打包输出路径
        }
      },

加入打包命令

{
      ...
      "scripts": {
            "electron": "concurrently \"react-scripts start\" \"wait-on http://localhost:3000 && electron .\"",
            "build-win32": "react-scripts build && electron-builder --win --ia32",
            "build-win64": "react-scripts build && electron-builder --win --x64",
            "build-mac": "react-scripts build && electron-builder --mac",
        }
      ...
    }

### 运行打包 ###

# 64位windows程序
    yarn build-win64

运行完成以后在 `dist`目录下会生成一个.exe安装文件

码云地址：[https://gitee.com/charming-cheng/calculator.git][https_gitee.com_charming-cheng_calculator.git]

[6587214-bc61e5ece9451cbc.png]: /images/20210804/7bf4eeaabf2d40c18978e5908afabf59.png
[https_gitee.com_charming-cheng_calculator.git]: https://links.jianshu.com/go?to=https%3A%2F%2Fgitee.com%2Fcharming-cheng%2Fcalculator.git