主进程

// 保证窗口只有一个主程序
const gotTheLock = app.requestSingleInstanceLock();
if (gotTheLock) {
  app.on('second-instance', (event, commandLine, workingDirectory) => {
    console.log(event, workingDirectory);
    if (win) {
      if (win.isMinimized()) win.restore();
      win.focus();
    }
  });
} else {
  app.quit();
}