优化各项

electron/main.js

@@ -38,7 +38,8 @@ app.whenReady().then(() => {
   });
 
   ipcMain.on("quitHandler", (_, msg) => {
-    app.quit();
+    win = null;
+    app.exit();
   });
 
   // 给渲染进程返回打印机列表
@@ -242,6 +243,12 @@ app.whenReady().then(() => {
       }
     });
   }
+
+  // 阻止默认关闭
+  win.on("close", (e) => {
+    e.preventDefault();
+    win.webContents.send("showCloseDialog");
+  });
 });
 app.on("window-all-closed", () => {
   if (process.platform !== "darwin") app.quit();