优化

dist-electron/main.js

@@ -1,6 +1,7 @@
 "use strict";
 const path = require("path");
 const electron = require("electron");
+const os = require("os");
 let win;
 electron.app.whenReady().then(() => {
   win = new electron.BrowserWindow({
@@ -35,6 +36,17 @@ electron.app.whenReady().then(() => {
       win.webContents.send("printList", res);
     });
   });
+  electron.ipcMain.on("getOSmacSync", () => {
+    let mac = "";
+    if (os.networkInterfaces().WLAN) {
+      mac = os.networkInterfaces().WLAN[0].mac;
+      console.log("wlan.mac===", mac);
+    } else {
+      mac = os.networkInterfaces()["以太网"][0].mac;
+      console.log("以太网.mac===", mac);
+    }
+    win.webContents.send("getOSmacRes", mac);
+  });
   const printWin = new electron.BrowserWindow({
     show: false,
     width: 464,
@@ -123,7 +135,7 @@ electron.app.whenReady().then(() => {
   });
   const tagPrintWin = new electron.BrowserWindow({
     show: false,
-    width: 320,
+    width: 360,
     height: 240,
     webPreferences: {
       nodeIntegration: true,
@@ -146,7 +158,7 @@ electron.app.whenReady().then(() => {
       silent: true,
       deviceName: name,
       pageSize: {
-        width: 4e4,
+        width: 45e3,
         height: 3e4
       },
       scaleFactor: 80,
@@ -164,6 +176,19 @@ electron.app.whenReady().then(() => {
       }
     });
   });
+  const gotTheLock = electron.app.requestSingleInstanceLock();
+  if (!gotTheLock) {
+    electron.app.quit();
+  } else {
+    electron.app.on("second-instance", (event, commandLine, workingDirectory) => {
+      if (win) {
+        if (win.isMinimized())
+          win.restore();
+        win.focus();
+        win.show();
+      }
+    });
+  }
 });
 electron.app.on("window-all-closed", () => {
   if (process.platform !== "darwin")