12-23-上传master

src/components/HeaderDropdown/index.less

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+@import '~antd/es/style/themes/default.less';
+
+.container > * {
+  background-color: @popover-bg;
+  border-radius: 4px;
+  box-shadow: @shadow-1-down;
+}
+
+@media screen and (max-width: @screen-xs) {
+  .container {
+    width: 100% !important;
+  }
+  .container > * {
+    border-radius: 0 !important;
+  }
+}

src/components/HeaderDropdown/index.tsx

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+import { DropDownProps } from 'antd/es/dropdown';
+import { Dropdown } from 'antd';
+import React from 'react';
+import classNames from 'classnames';
+import styles from './index.less';
+
+declare type OverlayFunc = () => React.ReactNode;
+
+export interface HeaderDropdownProps extends Omit<DropDownProps, 'overlay'> {
+  overlayClassName?: string;
+  overlay: React.ReactNode | OverlayFunc | any;
+  placement?: 'bottomLeft' | 'bottomRight' | 'topLeft' | 'topCenter' | 'topRight' | 'bottomCenter';
+}
+
+const HeaderDropdown: React.FC<HeaderDropdownProps> = ({ overlayClassName: cls, ...restProps }) => (
+  <Dropdown overlayClassName={classNames(styles.container, cls)} {...restProps} />
+);
+
+export default HeaderDropdown;