diff --git a/src/main/index.js b/src/main/index.js
index c68b758..7f9e79f 100644
--- a/src/main/index.js
+++ b/src/main/index.js
@@ -2,9 +2,10 @@
 const { app, BrowserWindow, protocol, ipcMain, dialog } = require('electron')
 const path = require('path')
 
+let mainWindow;
 function createWindow() {
   // Create the browser window.
-  const mainWindow = new BrowserWindow({
+  mainWindow = new BrowserWindow({
     width: 1080,
     height: 600,
     webPreferences: {
@@ -25,12 +26,13 @@ function createWindow() {
   // and load the index.html of the app.
   // mainWindow.loadFile('./dist/index.html')
   // mainWindow.loadURL('http://47.104.91.134:9000');
-  // mainWindow.loadURL('http://47.104.91.134:9000', { "extraHeaders": "pragma: no-cache\n" });
-  mainWindow.loadURL('http://localhost:8081');
+  mainWindow.loadURL('http://47.104.91.134:9000', { "extraHeaders": "pragma: no-cache\n" });
+  // mainWindow.loadURL('http://localhost:8081');
   // 隐藏菜单栏
   mainWindow.setMenuBarVisibility(false);
   // Open the DevTools.
-  mainWindow.webContents.openDevTools()
+  // mainWindow.webContents.openDevTools()
+  mainWindow.maximize();
 }
 
 // This method will be called when Electron has finished
@@ -63,6 +65,20 @@ app.on('window-all-closed', function () {
   if (process.platform !== 'darwin') app.quit()
 })
 
+const gotTheLock = app.requestSingleInstanceLock()
+if (!gotTheLock) {
+  app.quit()
+} else {
+  app.on('second-instance', (event, commandLine, workingDirectory) => {
+    // 当运行第二个实例时,将会聚焦到mainWindow这个窗口
+    if (mainWindow) {
+      if (mainWindow.isMinimized()) mainWindow.restore()
+      mainWindow.focus()
+      mainWindow.show()
+    }
+  })
+}
+
 // 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.