electron打包后，托盘图标报错的解决办法

const {app,BrowserWindow,Menu,Tray,dialog} = require('electron');
const path = require('path');

let tray;
let contextMenu;

function createWindow(){
   win = new BrowserWindow({
    show:false,
    webPreferences: {
        nodeIntegration: true
    }
   });
   
   win.loadFile('index.html');

   //添加托盘图标
   // tray = new Tray('./images/icon3.png');//之前用的是相对路径，打包后会报错
   tray = new Tray(path.join(__dirname, '/images/icon3.png'));//使用绝对路径，打包后正常
   
   //生成上下文菜单
   contextMenu = Menu.buildFromTemplate([
        {label:'复制',role:'copy'},
        {label:'粘贴',role:'paste'},
        {label:'剪切',role:'cut'}
    ]);
   tray.setToolTip('托盘图标提示文本');//鼠标移到托盘图标上会提示这段文本

   //托盘图标左键点击事件
   tray.on('click',(event)=>{
        win.show();
   });
   //托盘图标右键点击事件
   tray.on('right-click',(event)=>{
        tray.popUpContextMenu(contextMenu);
   });

   win.on('ready-to-show',()=>{
       win.show();
   });
   win.on('closed',()=>{
    console.log('closed');
    win = null;
   });

   //打开开发者工具
   win.webContents.openDevTools();
}

app.allowRendererProcessReuse = true;
app.on('ready',createWindow);
app.on('window-all-closed',()=>{
    console.log('window-all-closed');
    if(process.platform != 'darwin'){
        app.quit();
    }
});
app.on('activate',()=>{
    console.log('activate');
    if(win == null) {
        createWindow();
    }
});